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plant growth and development practice 2

Total questions: 201

Worksheet time: 3hrs 40mins

Name
Class
Date
1.

a student conducts an experiment on decorative plants. He varies the type of fertilizers that been used for each pot, those are fertilizer A, B, and C. Data about plant height and number of flowers are recorded daily for 21 days. The independent variable of this experiment is ...

a)

decorative plant

b)

numbers of flower

c)

plant height

d)

types of fertilizer

e)

humidity of planting media

2.

The table below shows data of an experiment about the effect of media on the growth of groundnut. Same volume of media are used. Each set of plant is watered with the same amount of water and same frequency. Data started to be recorded when the first plumule emerges. What can be concluded from this experiment?

a)

groundnut stem elongation is inhibited by the presence of wet cotton

b)

groundnut can only grow if being planted in soil

c)

growth of groundnut is highly depend on the presence of water

d)

growth of groundnut is faster if the seeds are planted in soil

e)

growth of groundnut is not affected by wet cotton

3.

.... plays role on primary growth, while .... plays role on secondary growth.

a)

intercalary meristem, apical meristem

b)

lateral meristem; apical meristem

c)

lateral meristem; intercalary meristem

d)

apical meristem; lateral meristem

e)

apical meristem; intercalary meristem

4.

.... plays role on primary growth, while .... plays role on secondary growth.

a)

intercalary meristem, apical meristem

b)

lateral meristem; apical meristem

c)

lateral meristem; intercalary meristem

d)

apical meristem; lateral meristem

e)

apical meristem; intercalary meristem

5.

what is the correct order of layers in mature stem from the innermost to the outermost?

a)

pith-secondary xylem-primary xylem-vascular cambium-primary phloem-secondary phloem-cork-cork cambium

b)

pith-secondary phloem-primary phloem-vascular cambium-primary xylem-secondary xylem-cork-cork cambium

c)

-pith-secondary phloem-primary phloem-vascular cambium-primary xylem-secondary xylem-cork cambium-cork

d)

pith-primary xylem-secondary xylem-vascular cambium-secondary phloem-primary phloem-cork cambium-cork

e)

pith-primary phloem-secondary phloem-vascular cambium-secondary xylem-primary xylem-cork-cork cambium

6.

which of the following is not a principle of plant development?

a)

the presence of actively dividing cells in meristem makes plant able to develop continuously

b)

plant tissue culture is an example of artificial reverse development in plant

c)

development of plant is really flexible so that a cell can be a whole new plant

d)

once a plant produces fruits, its development process stops

e)

the final shape of a plant organ is determined by the rate of cell division in that part

7.

where does the intercalary meristem located?

a)

at the tip of radish root

b)

at the tip of mung bean bud

c)

at the top of coleus leaves

d)

at the internodes of sugarcane plant

e)

in between the xylem and phloem of mango tree

8.

in mature plant, function of protection is given by the presence of ...

a)

epidermis

b)

vascular cambium

c)

xylem

d)

cork

e)

phloem

9.

a phenomenon shown in picture below is mainly promoted by the presence of ...

a)

Auxin and ABA

b)

Ethylene and Cytokinin

c)

ABA and Gibberellin

d)

ABA and Ethylene

e)

Cytokinin and Auxin

10.

a farmer has problem about how to keep his product, that is cut flowers, to stay fresh during shipment. what can you suggest to solve this problem?

a)

he could try to spray artificial auxin to prolong the freshness

b)

he could try to infuse the flower with solution of gibberellin

c)

he could try to put the flowers in tubes containing ethylene

d)

he could try to apply cytokinin to prolong the freshness

e)

he could try to inject a proper amount of ABA to the flowers

11.

plant hormones that play role to stimulate fruit ripening is ...

a)

auxin and ethylene

b)

cytokinin and ABA

c)

auxin and gibberellin

d)

ethylene and ABA

e)

gibberellin and cytokinin

12.

A gardener wants to have her decorative plant becomes shady and leafy, not only growing upward. What can you suggest to her?

a)

spray the leaves with cytokinin so it can widen the size of leaves

b)

inject the stem with artificial gibberellin so it can breaks dormancy

c)

water the plant with auxin solution to promote primary growth

d)

cut the upper part of the shoot in order to minimize the apical dominance

e)

apply abscissic acid to promote abscission of leaf, flower, and fruit

13.

PGRs include –

a)

Only growth promoters

b)

Only growth inhibitors

c)

Both growth promoters and growth inhibitors

d)

Only solid hormones, not gaseous hormones

14.

Which of the following growth regulators can fit either of the groups (promoter and inhibitor) –

a)

C2H4

b)

ABA

c)

GA

d)

IAA

15.

3 terms – Inhibitor-B, Abscission II and Dormin are used for the same hormone. That hormone is –

a)

Auxin

b)

ABA

c)

C2H4

d)

GA

16.

Which one(s) is acidic in nature?

a)

Auxins

b)

GAs

c)

ABA

d)

All

17.

Bolting is –

a)

Internodal elongation just prior to flowering in beet, cabbage and many plants with rosette habit.

b)

A type of grafting

c)

Nodal elongation in certain plants

d)

None

18.

Which one is false?

a)

GA3 is used to speed up the malting process in brewing industry

b)

Spraying juvenile conifers with GAs hastens the maturity, thus leading to early seed production

c)

GA3 is a commercially available gibberellin

d)

GA3 cannot increase the length of internode in sugarcane

19.

Two cytokinins are kinetin and Zeatin. What is the difference between the two?

a)

Kinetin is the active form of zeatin

b)

Zeatin is the active form of kinetin

c)

Zeatin is a synthetic cytokinin and kinetin is naturally occuring

d)

Zeatin is a naturally occuring plant cytokinin, kinetin is not

20.

Cytokinins are formed primarily in which area of the plant?

a)

Tips of shoot

b)

Root

c)

Stem

d)

Lateral buds and leaves

21.

Auxin and Cytokinin are antagonistic in which of the following functions?

a)

Cell division

b)

Phototropism

c)

Apical dominance

d)

Geotropism

22.

Natural cytokinins are synthesised in –

a)

Root apices

b)

Developing shoot buds

c)

Young fruits

d)

All

23.

Kinetin, a modified adenine (purine) was discovered from –

a)

the autoclaved herring sperm DNA

b)

Coconut milk

c)

Corn-Kernel

d)

Fungus

24.

Zeatin was extracted for the first time from –

a)

Maize

b)

Coconut

c)

Fungus

d)

Autoclaved herring sperm

25.

Cytokinins help to produce all except –

a)

New leaves

b)

Chloroplast in leaves

c)

Lateral shoot growth and adventitious shoot formation

d)

Rooting on stem cut

26.

Cytokinin helps in delay of leaf senescene by –

a)

Increasing more water absorption by root

b)

Increasing rate of translocation of organic solutes

c)

Promoting nutrients mobilization

d)

Formation of adventitious buds

27.

Which of the following is a potent weedicide ?

a)

IPA

b)

TIBA

c)

BAP

d)

2, 4-D

28.

Auxin was discovered by

a)

Charles Darwin

b)

F.W. Went

c)

Francis Darwin

d)

F. Skoog

29.

Precursor of Auxin is

a)

Tryptophan

b)

Acetyl Co-A

c)

Zinc

d)

N-acetyl glcosamine

30.

Select the odd one out with respect to Auxin

a)

Naphthalene Acetic Acid

b)

2,4-Dichloro phenoxy acid

c)

Indole Propionic Acid

d)

Indole Butyric Acid

31.

Decapitation is done in tea plantation to promote lateral growth. This fact is related to:

a)

Gibberallin

b)

Auxin

c)

Cytokinin

d)

Ethylene

32.

Shoot initiation is promoted mainly by-

a)

Auxin

b)

Cytokinin

c)

Gibberallin

d)

Ethylene

33.

Callus is-

a)

Ethylene derivative

b)

Auxin derivative

c)

Gibberellin derivative

d)

None of these

34.

Which of the following can be used in plant propagation to promote root growth-

a)

Auxin

b)

Cytokinin

c)

Gibberellin

d)

Ethylene

35.

Which of the following promotes senescence mainly?

a)

Auxin

b)

Cytokinin

c)

Gibberellin

d)

ABA

36.

Abscission is promoted mainly by-

a)

Auxin

b)

Cytokinin

c)

Giberellin

d)

ABA

37.

Simultaneous leaf senescence is found in-

a)

Annuals

b)

Biennials

c)

Perennials

d)

Evergreen plants

38.

Seed dormancy can be broken by :

a)

ABA and GA3

b)

GA3 and ethylene

c)

IAA and ABA

d)

ABA and IPA

39.

Which of the following is a potent weedicide ?

a)

IPA

b)

TIBA

c)

BAP

d)

2, 4-D

40.

Seedless fruits can be induced by

a)

ABA and IAA

b)

ABA and Zeatin

c)

IAA and GA3

d)

Ethylene and ABA

41.

Fruit and leaf drop at early stages can be prevented by the application of:

a)

Ethylene

b)

Auxins

c)

Gibberellic acid

d)

Cytokinins

42.

Which of the following plant activity is not an example of growth promotion activity?

a)

Germination of seeds

b)

Cell division

c)

Delay in senescence

d)

Abscission

43.

Cytokinin involves

a)

Kinetin, zeatin, BAP

b)

GA3, IBA, Kinetin

c)

Zeatin, GA3, BAP

d)

IAA, Zeatin, kinetin

44.

Which of the following statement is wrong about Abscisic acid :

a)

It helps in general plant metabolism

b)

It is antagonistic to GA3

c)

It helps in seed maturation & dormancy

d)

Morphogenesis

45.

Vernalization

a)

Help in shortening the period between germination and flowering

b)

Is useless for monocots

c)

Is high temperature treatment to some annual crops

d)

More than one option is correct.

46.

Removal of shoot tips is a very useful technique to boost the production of tealeaves. This is because :

a)

Gibberellins delay senescence of leaves.

b)

Gibberellins prevent bolting and are inactivated.

c)

Auxins prevent leaf drop at early stages.

d)

Effect of auxins is removed and growth of lateral buds is enhanced.

47.

In order to increase the yield of sugarcane crop, which of the following plant growth regulators should be sprayed?

a)

Cytokinins

b)

Ethylene

c)

Auxins

d)

Gibberellin

48.

Which one includes growth promoters?

a)

Auxin, Cytokinin, ABA

b)

GA, Cytokinin, C2H4

c)

C2H4, ABA

d)

Auxin, Cytokinin, GA

49.

Which one include growth inhibitors?

a)

ABA, Cytokinin

b)

GA, IAA

c)

ABA, C2H4

d)

None

50.

The hormone responsible for phototropism is –

a)

Auxin

b)

C2H4

c)

ABA

d)

GA

51.

The phenomenon of apical dominance is strengthened by –

a)

Removal of the tip

b)

Removal of leaves

c)

Auxin production

d)

Production of fruits

52.

If a shoot cutting is treated with auxin, which of the following is likely to result?

a)

Extensive root production

b)

Suppression of apical dominance

c)

Growth of lateral buds

d)

Bolting of the shoot

53.

Go through the following statements –

I. Promotes flowering in pineapple

II. Used to prepare weed free lawn

III. Promotes the abscission of older mature leaves and fruits

The above functions are carried out by –

a)

GA

b)

C2H4

c)

ABA

d)

Auxin

54.

Which GA was the first Giberrellin to be discovered?

a)

GA1

b)

GA2

c)

GA3

d)

GA4

55.

Gibberellins have many effects. Which one of the following is not an effect of gibberellins in plants?

a)

Bolting

b)

Delay senescence

c)

Increase the grapes stalk

d)

Induces dormancy

56.

The fruits can be left on the tree longer so as to extend the market period. This is due to which function of GA?

a)

Bolting

b)

Delay senescence

c)

Internodal elongation

d)

Parthenocarpy

57.

Which of the following hormones causes fruits like apple to elongate and improve its shape –

a)

GA

b)

ABA

c)

NAA

d)

2, 4 D

58.

Who isolated auxin from coleoptile seedling for the first time –

a)

Darwin

b)

Miller

c)

Skoog

d)

F. W. Went

59.

Auxin was first isolated from –

a)

Coleoptile of oat

b)

Human urine

c)

Maize

d)

tea

60.

The term “auxin” is used for –

a)

IAA

b)

NAA

c)

2, 4-D and 2, 4, 5-T

d)

All

61.

Which one is correct?

a)

IAA and IBA are natural but NAA , 2, 4-D and 2, 4, 5-T are synthetic auxins

b)

IAA and NAA are natural but IBA, 2, 4, 5-T and 2, 4-D are synthetic auxin

c)

NAA and 2, 4, 5-T are natural but IAA, IBA and 2, 4-D are synthetic hormones

d)

IAA, NAA, IBA, 2, 4-D and 2, 4, 5-T are synthetic auxins

62.

Plant growth substances generally –

a)

Have a single role

b)

Are species-specific

c)

Are produced in many parts of plant

d)

Affect mainly the cells that produce them

63.

Which process is not directly affected by auxin?

a)

Apical dominance and root initiation

b)

Parthenocarpy

c)

Synthesis of -amylase by barley seeds

d)

Leaf abscission

64.

Branching is inhibited by __________ from the tip of a growing shoot, but this effect is encountered by ____________ from the root.

a)

Cytokinin, auxin

b)

Auxin, Cytokinin

c)

GA, Cytokinin

d)

GA, ABA

65.

Which of the following statements correctly explains why a plant becomes bushier when the tip of its shoot is removed?

a)

The removal of the plant tip also removes the auxin that is keeping lower buds from developing

b)

Programmed cell death allows the plant to change its form

c)

The concentration of the morphogens sent from the root to stem is increased

d)

None of the above

66.

Which of the following plant hormones can cause the base of a shoot to form new root, prevents fruit and leaf drop at early stage, to be used as herbicide / weedicide, also controls xylem differentiation and helps in cell division –

a)

GA

b)

Cytokinin

c)

Auxin

d)

ABA

67.

Removal of shoot tips (decapitation) means loss of apical dominance and it is widely applied in –

a)

Tea plantation

b)

Hedge-making

c)

Both a and b

d)

Bolting

68.

C2H4 is synthesised in large amounts by –

a)

Shoot tip

b)

Root tip

c)

Young leaves

d)

Tissue undergoing senescence and ripening fruits

69.

I. C2H4 promotes leaf senescence

II. C2H4 speeds the ripening of fruits

III. C2H4 causes apical hook formation

IV. C2H4 promotes horizontal growth of seedling and swelling of axis

V. C2H4 promotes male flowers in cucumber thereby increasing the yield

Which one is false?

a)

All

b)

I and V

c)

II and IV

d)

V

70.

During ripening of the fruits, rate of respiration is increased under the influence of hormone. It is called Climacteric respiration. The hormone is –

a)

ABA

b)

Auxin

c)

C2H4

d)

GA

71.

Which hormone is used to initiate flowering and synchronising fruit set in pineapple?

a)

C2H2

b)

C2H4

c)

GA3

d)

IAA

72.

Seed dormancy is regulated by –

a)

C2H4

b)

ABA

c)

IAA

d)

GA3

73.

I. Cytokinin is primarily concerned with cell division

II. C2H4 breaks seed and bud dormany

III. ABA stimulates the opening of stomata

IV. C2H4 initiates germination in peanut seeds, sprouting of potato tubers

V. ABA is synergistic to GA

The false statement is –

a)

I, II, IV

b)

III, V

c)

III, IV

d)

IV, V

74.

Which one is stress hormone –

a)

ABA

b)

C2H4

c)

GA7

d)

IAA

75.

I. “Y” hormone induces flowering in mango and also promotes rapid internode / petiole elongation in deep water rice plants and hence helping leaves or upper part of shoot above water.

II. “X” hormone promotes root growth and root hairs formation

III. “Z” hormone inhibits the seed germination, increases the tolerance of plant to various stresses, play important role in seed development, maturation and dormancy.

Identify the correct names of hormones

a)

Y = ABA; X = Auxin; Z = GA

b)

Z = GA; X = Auxin; Y = C2H4

c)

Y = Auxin; X = C2H4; Z = GAA

d)

Y = C2H4; X = C2H4; Z = ABA

76.

The most widely used compound as a source of C2H4 is –

a)

Kinetin

b)

Zeatin

c)

IBA

d)

Ethephon

77.

Ethephon hastens the fruit ripening in tomatoes and apple and accelerates abscission in flowers and fruits.

Above statement indicates that ethephon must release –

a)

ABA

b)

C2H4

c)

IAA

d)

GA7

78.

Which of the following is incorrect?

a)

Any PGR has diverse physiological effects on plants

b)

Diverse PGRs manifest similar effect

c)

PGRs may act synergistically and antagonistically

d)

None

79.

Intrinsic heterophylly is seen in all except –

a)

Cotton

b)

Coriander

c)

Buttercup

d)

Larkspur

80.

Intrinsic factors affecting development include –

a)

Intracellular (genetic) factors

b)

Intercellular factors like light

c)

Intercellular factors like PGRs

d)

a and c

81.

ABA was discovered during –

a)

Mid 1960s

b)

Mid 1906

c)

Mid 1966

d)

Mid 1967

82.

The discovery of auxin is traced back to the work of Charles and Francis Darwin. In their experiments, they studied

a)

Photonastic movement

b)

Photoperiodism

c)

Phototropism

d)

Photosynthesis

83.

Growth:

Increase in size, weight and number of cells

a)

True

b)

False

84.

Graph of measurement of physical changes against time known as ...

a)

growth curve

b)

growth rate

c)

development curve

d)

development rate

85.

What is growth?

a)

it is the quantitative change in form in an organism over a period of time

b)

it is quantitative increase in size in an organism over a period of time

c)

it is the change in the degree of specialization of tissues

d)

it is a measure of an increase in size of an object

86.

The process where meristematic cells become specialized is called

a)

cell differentiation

b)

cell derivation

c)

cell enlargement

d)

cell division

87.

Which statement about unlimited growth curve is correct?

a)

Continue to grow until they are restricted by environment factors

b)

Growth is complete when the organism achieves its maximum size

c)

The growth of an organism within the organs grow at the same rates with the other parts of the body

d)

Shows the correlation between the growth and development of the organism

88.

Which of the following are related to growth phases?


I Cell enlargement

II Cell division

III Cell maturation

a)

I only

b)

I and II only

c)

II and III only

d)

I, II and III

89.

Which of the following is the most accurate parameter to use for measuring the growth of a plant?

a)

Dry mass

b)

Weight mass

c)

Height

d)

Surface area

90.

What is\are the disadvantage(s) of using the wet mass of an organism to measure growth?


I The measurement is not accurate

II Water content in the organism is inconsistent

III It is used only to measure organism living in water

a)

I only

b)

I and II only

c)

II and III only

d)

I, II and III

91.

Which of the following is/are TRUE about intermittent growth?


I It is also known as discontinuous growth

II Length is not an ideal parameter to measure intermittent growth

III It is a step-like pattern growth curve

a)

I only

b)

I and II only

c)

II and III only

d)

I, II and III

92.

The figure shows the growth phases of an organism. Describe what happen during log phase?

a)

Cells are still dividing but at a rate replacing the cells that have died

b)

Growth slow down because limited by internal or external factors

c)

The fastest organism growth

d)

Organisms is trying to adapt to the new environment

93.

What does an absolute growth curve show?

a)

It shows the actual growth of the organism

b)

It shows the rate of growth of the organism

c)

It shows the lifespan of an organism

d)

It shows the amount of growth per unit time

94.

Auxins are responsible for _____________ of a plant

a)

Colour change

b)

Watering

c)

Phototropism

d)

Growth

95.
The root of a plant growing down. 
a)
Positive Gravitropism 
b)
Negative Gravitropism 
c)
Thigmotropism
d)
Hydrotropism
96.

what type of tropism is occurring here?

a)

phototropism

b)

thigmotropism

c)

geotropism

d)

tropictropism

97.

The diagram shows the same plant. Which of the following statements is not true

a)

Plant b will be shorter than plant A

b)

plant b produces lateral branches since the apical bud is removed

c)

plant A shows apical dominance

d)

plant a produces abscisic acid to prevend side branches from forming

98.

What is the phenomenon that is affecting the growth of the bean shoot

a)

gravitrophism

b)

phototropism

c)

thigmotrophism

d)

rapid movement

99.

which plant hormone produces opposite effects?

a)

dormancy and cotyledons

b)

dormancy and germination

c)

auxin and cytokins

d)

auxins and ethylene

100.
Which plant hormone is a gas?
a)
auxin
b)
gibberellin
c)
ethene
d)
cytokinin
101.

Where is auxin formed

a)

Tip of stem and root

b)

Leaves

c)

Embryo

d)

All

102.

Apical dominance which suppresses lateral bud development is caused by what hormone?

a)

auxin

b)

gibberellin

c)

ethylene

d)

imbibition

103.

Which of the following are plant hormones

a)

Auxin

b)

Cytokinin

c)

Gibberellin

d)

Abcissic acid, ethylene

e)

All

104.
Poison Ivy growing on a tree by touch.
a)
Gravitropism 
b)
Phototropism
c)
Thigmotropism
d)
Hydrotropism
105.
A plant growing in response to the sunlight. 
a)
Gravitropism 
b)
Phototropism
c)
Thigmotropism
d)
Hydrotropism
106.
Roots of a tree growing towards the water line of a house. 
a)
Gravitropism 
b)
Phototropism
c)
Thigmotropism
d)
Hydrotropism
107.
Roots of a tree growing towards the water line of a house. 
a)
Gravitropism 
b)
Phototropism
c)
Thigmotropism
d)
Hydrotropism
108.
 A stimulus is ___________
a)
a change in an organisms surroundings.
b)
 process in which organisms grow larger.
c)
a reaction to a change in surroundings
d)
the result of sexual reproduction.
109.
What does this picture represent? 
a)
Thigmotropism
b)
Phototropism
c)
Hydrotropism
d)
Geotropism (Gravitropism)
110.
When we see growth or a seed sprouts it shows _______.
a)
pollination
b)
sun
c)
germination
d)
reproduction
111.
Seeds need _______ , warm temperatures, and nutrients in order to start growing.
a)
grass
b)
water
c)
leaves
d)
stems
112.

any change in an organism’s environment that

causes a response is ................................

a)

Photosynthesis

b)

cellular respiration

c)

Stimuli

d)

Tropism

113.

The roots have negative

a)

phtotropism

b)

Thigmotropism

c)

Gravitropism

d)

Hormones

114.

Stem has

a)

negative phototropism

b)

positive gravitropism

c)

Positive Phototropism

d)

no answer

115.

What tropism is being depicted

a)

Thigmotropism

b)

Phototropism

c)

Gravitropism

d)

Hydrotropism

116.

What is a result of tropisms?

a)

New species of plants are created.

b)

Plants develop new characteristics.

c)

Plants adapt to environmental change.

d)

Flowers are pollinated and fertilized.

117.

What is a result of tropisms?

a)

Plants develop flowers and leaves.

b)

Plants produce seeds and reproduce.

c)

Plants become dormant for a period of time.

d)

Plants grow toward favorable conditions.

118.

What hormone speeds up the rate at which a plant's cells grow?

a)

hormone

b)

auxin

c)

darknessium

d)

visuals

119.

Where is auxin formed

a)

Tip of stem and root

b)

Leaves

c)

Embryo

d)

All

120.

Apical dominance which suppresses lateral bud development is caused by what hormone?

a)

auxin

b)

gibberellin

c)

ethylene

d)

imbibition

121.
Is light an internal or external stimulus?
a)
Internal
b)
External
122.

Rearrange the FOUR phases of a typical sigmoid curve into the CORRECT sequence

I Log phase

II Stationary phase

III Linear phase

IV Lag phase

a)

I, IV, III, II

b)

I, IV, II, III

c)

IV, I, III, II

d)

IV, I, II,III

123.

During __________, growth rate is slow but growth rate will accelerate in _________, due to sufficient of food supply.

a)

Log phase, linear phase

b)

Lag phase, stationary phase

c)

Lag phase, log phase

d)

Linear phase, log phase

124.

The figure shows the growth phases of an organism. Describe what happen during log phase?

a)

Cells are still dividing but at a rate replacing the cells that have died

b)

Growth slow down because limited by internal or external factors

c)

The fastest organism growth

d)

Organisms is trying to adapt to the new environment

125.

Graph of measurement of physical changes against time known as ...

a)

growth curve

b)

growth rate

c)

development curve

d)

development rate

126.

Plotting the increase in weight of a germinating pea seedling against time, produces

a)

an exponential curve.

b)

an inclined straight line.

c)

a sigmoid curve.

d)

a horizontal straight line.

127.

What is /are the disadvantages of using the wet mass of an organism to measure growth


I. the measurement is not accurate

II. water content in the organism is inconsistent

III. it is used only to measure organisms living in water

a)

I only

b)

I and II only

c)

II and III only

d)

I, II and III

128.
Is the pictured graph growth, decay, or linear or none?  
a)
Exponential Growth
b)
Exponential Decay
c)
Linear
d)
None
129.
Plant growth regulators can be both ____________ and __________.
a)
Natural, synthetic
b)
Hard, soft
c)
Synthetic, helpful
d)
Inhibiting, dormant
130.
Which PGR is a natural growth inhibitor?
a)
Auxin
b)
Gibberellin
c)
Cytokinin
d)
Abscisic Acid
131.

Select all that apply.

The vascular cambium ______________.

a)

lies between the xylem and the phloem

b)

encircles the tree from the root to almost the top of the shoot

c)

is made of cells that divide

132.
A section of a plant capable of developing into a new plant.
a)
Bulb
b)
Cutting
c)
Runner
133.

Plant growth is

a)

dry weather

b)

size increase by cell division and enlargement

c)

size increase by vegetative state

d)

seed germination

134.

Plant development is the plants ...

a)

progress through its lifecycle

b)

ability to withstand heat

c)

progress through its germination

d)

ability to be diverse

135.

Some stages of development are

a)

seed germination, growth of vegetative organs, and senescence

b)

seed germination, growth of vegetative organs and dry weight

c)

fertilization and genetic factors

d)

fertilization and environmental factors

136.

Apical meristems are

a)

vegetative buds at the shoot tips

b)

in the axils of leaves

c)

actively dividing

d)

all of the choices

137.

The thickening of trunks of trees is due to

a)

non-meristemic tissue

b)

the vascular cambium

c)

the solar cambium

d)

lack of cambium

138.

The vascular cambium is located between

a)

the meristem

b)

the seed pod

c)

the xylem and the pholem

d)

the xylem and the root

139.

The cork cambium produces

a)

vascular cambium

b)

cork in the vascular cambium

c)

cork in the xylem

d)

cork in the bark layer

140.

Select all that apply.

In mature plants, apical meristems

a)

can produce flowers needed to produce seeds

b)

can become cork cambium

c)

can become vascular caambium

d)

can become reproductive meristems

141.

A type of plant will grow tendrils and wind round a support. Name this type of reaction.

a)

Tropism.

b)

Nastic response.

c)

Reflex action.

d)

Taxis response.

142.

What is the role of auxin that causes a plant to bend towards light?

a)

The concentration of auxin in the plant increases when there is light.

b)

Auxin causes uniform growth on every stem.

c)

Auxin causes cells that are on the dark side to grow faster.

d)

Auxin causes the increase in the number of plant cells.

143.

The growth hormone that is used to speed up the ripening of fruits for export is

a)

giberellin.

b)

ethylene.

c)

cytokinin.

d)

auxin.

144.

What is the reaction that is shown by the plant in the figure above?

a)

Positive hydrotropism.

b)

Negative phototropism.

c)

Positive thigmotropism.

d)

Negative geotropism.

145.

The figure above shows a mimosa plant. What is the conclusion that can be derived based on the reaction in the figure.

a)

The mimosa plant shows a seismonastic reaction.

b)

The leaf of the mimosa becomes sturgid when touched.

c)

The osmotic pressure in the mimosa cell increases when touched.

d)

The temperature of the glass rod becomes very high until the leaf fades when touched.

146.

The figure above shows the reaction of a plants to a stimulus. What is the reaction shown by the plants?

a)

Thermonasty.

b)

Thigmonasty.

c)

Photonasty.

d)

Seismonasty.

147.

The movement of Euglena sp and Volvox sp. towards moderate light itensity is a type of reaction to an external stimulus. What is the reaction?

a)

Photonasty.

b)

Phototaxis.

c)

Thermonasty.

d)

Phototropism.

148.

The figure above shows four coleoptiles P, Q, R and S that are exposed to unilateral light. After two days, which coleoptile will move towards the light?

a)

P only.

b)

R only.

c)

P and R only.

d)

P, Q and S only.

149.

The figure above shows an experiment

that is done on two plants of the same species. Both plants are left in the open.

What will happen to the two plants after two weeks


I Plant B bends towards the opening of

the box.

II The auxin in stem A is distributed

uniformly.

III The auxin in stem B is not distributed

uniformly.

IV Plant A bends to the right.

a)

I, II and III only.

b)

I, II and IV only.

c)

I, III and IV only.

d)

II, III and IV only.

150.

The figure below above shows an experiment to study the effect of auxin towards the growth of the coleoptiles. Which of the following conclusions are true about the experiment?


I Auxin is produced at the tip of the

coleoptiles and diffuses to the bottom to stimulate

growth.

II The supply of auxin is cut off in the

dark.

III Auxin cannot penetrate a mica plate.

IV Auxin can diffuse through a block of

agar-agar.

a)

I, II and III only.

b)

I, III and IV only.

c)

II, III and IV only.

d)

I, II, III and IV.

151.

What is the reaction that is shown by the plant in the figure above?

a)

Positive hydrotropism.

b)

Negative phototropism.

c)

Positive thigmotropism.

d)

Negative geotropism.

152.

The growth hormone that is used to speed up the ripening of fruits for export is

a)

giberellin.

b)

ethylene.

c)

cytokinin.

d)

auxin.

153.

Auxins are responsible for _____________ of a plant

a)

Colour change

b)

Watering

c)

Phototropism

d)

Growth

154.
The root of a plant growing down. 
a)
Positive Gravitropism 
b)
Negative Gravitropism 
c)
Thigmotropism
d)
Hydrotropism
155.

what type of tropism is occurring here?

a)

phototropism

b)

thigmotropism

c)

geotropism

d)

tropictropism

156.

What is the phenomenon that is affecting the growth of the bean shoot

a)

gravitrophism

b)

phototropism

c)

thigmotrophism

d)

rapid movement

157.

which plant hormone produces opposite effects?

a)

dormancy and cotyledons

b)

dormancy and germination

c)

auxin and cytokins

d)

auxins and ethylene

158.

Which plant hormone is a gas?

a)

auxin

b)

gibberellin

c)

ethylene

d)

cytokinin

159.

Where is auxin formed

a)

Tip of stem and root

b)

Leaves

c)

Embryo

d)

All

160.

Which of the following are plant hormones

a)

Auxin

b)

Cytokinin

c)

Gibberellin

d)

Abcissic acid, ethylene

e)

All

161.

What happens when you place an over ripe banana in a fruit bowl with other fruit?

a)

Nothing will happen

b)

The other fruit will grow in size

c)

Ethylene gas will cause the fruit to grow mold

d)

Ethylene gas will cause the other fruit to ripen

162.

Phototropism is

a)

The plant response to water

b)

The plant response to light

c)

The plant response to gravity

d)

The plant response to soil

163.

Geotropism is

a)

The plant response to light

b)

The plant response to water

c)

The plant response to soil

d)

The plant response to gravity

164.
Which hormone promotes seed germination?
a)
abscisic acid
b)
ethylene
c)
gibberellin
d)
auxin
165.

Breaks seed dormancy and promotes growth (can make fruit bigger)

a)

Auxin

b)

Gibberellin

c)

Cytokinins

d)

Ethylene

166.

Helps fruit ripen

a)

Auxin

b)

Gibberellin

c)

Cytokinins

d)

Ethylene

167.

Stimulates cell division

a)

abscisic acid

b)

auxin

c)

cytokinins

d)

gibberellin

e)

ethylene

168.

Hydrotropism is

a)

The plant response to water

b)

The plant response to light

c)

The plant response to gravity

d)

The plant response to soil

169.
Which plant hormone is a gas?
a)
auxin
b)
gibberellin
c)
ethylene
d)
cytokinin
170.
What polysaccharide is the primary component of plant cell walls?
a)
Expansin
b)
Cellulose
c)
Glycogen
d)
Endosperm
171.
Which hormone promotes seed germination?
a)
abscisic acid
b)
ethylene
c)
gibberellin
d)
auxin
172.
Negative gravitropism is exhibited in ____, because there is more auxin on _____ side of a shoot.  
a)
shoots, shaded
b)
shoots, light
c)
roots, shaded
d)
roots, light
173.
Response to light in which plant stems bend toward a light source
a)
gravitropism
b)
phototropism
c)
negative gravitropism
d)
negative phototropism
174.
When the plant responds to gravtiy
a)
Phototropism
b)
Thigmotropism
c)
Gravitropism
d)
Hydrotropism
175.
Hormone related to the growth of the plant in response to tropisms
a)
Auxin
b)
Cytokinins
c)
Ethene
d)
Absisic acid
176.
When the plant grows toward the stimuli
a)
Positive
b)
Negative
177.
Breaks seed dormancy and promotes growth (can make fruit bigger)
a)
Auxin
b)
Gibberellin
c)
Cytokinins
d)
Ethene
178.
Helps fruit ripen
a)
Auxin
b)
Gibberellin
c)
Cytokinins
d)
Ethene
179.
The root of a plant growing down. 
a)
Positive Gravitropism 
b)
Negative Gravitropism 
c)
Thigmotropism
d)
Hydrotropism
180.
The shoot of a plant growing up. 
a)
Positive Gravitropism 
b)
Negative Gravitropism 
c)
Thigmotropism
d)
Hydrotropism
181.
A plant growing in response to the sunlight. 
a)
Gravitropism 
b)
Phototropism
c)
Thigmotropism
d)
Hydrotropism
182.
A period of a plant when is does NOT grow
a)
spore
b)
stamen
c)
nutrient
d)
dormancy
183.
The time when a seed sprouts when its need for water, air, and warmth is met
a)
pollination
b)
germinate
c)
dormancy
d)
pistil
184.
If a plant gets light from only one direction the shoots will.....
a)
grow straight up
b)
grow down
c)
grow toward the light source
d)
grow faster
185.

What hormone speeds up the rate at which a plant's cells grow?

a)

hormone

b)

auxin

c)

darknessium

d)

visuals

186.
A seed can move by wind, water, and ________.
a)
clouds
b)
singing
c)
cars
d)
animals
187.
Which is not a requirement for germination of a seed?
a)
Favorable Temperature
b)
light
c)
fertilizer
d)
sufficient moisture
188.

If you cut the top off a shoot the plant will

a)

Die

b)

Not grow

c)

Grow straight up

d)

Grow towards the light

189.

Auxins are responsible for _____________ of a plant

a)

Colour change

b)

Watering

c)

Phototropism

d)

Growth

190.
The root of a plant growing down. 
a)
Positive Gravitropism 
b)
Negative Gravitropism 
c)
Thigmotropism
d)
Hydrotropism
191.

what type of tropism is occurring here?

a)

phototropism

b)

thigmotropism

c)

geotropism

d)

tropictropism

192.

The diagram shows the same plant. Which of the following statements is not true

a)

Plant b will be shorter than plant A

b)

plant b produces lateral branches since the apical bud is removed

c)

plant A shows apical dominance

d)

plant a produces abscisic acid to prevend side branches from forming

193.

What is the phenomenon that is affecting the growth of the bean shoot

a)

gravitrophism

b)

phototropism

c)

thigmotrophism

d)

rapid movement

194.

which plant hormone produces opposite effects?

a)

dormancy and cotyledons

b)

dormancy and germination

c)

auxin and cytokins

d)

auxins and ethylene

195.
Which plant hormone is a gas?
a)
auxin
b)
gibberellin
c)
ethene
d)
cytokinin
196.

Where is auxin formed

a)

Tip of stem and root

b)

Leaves

c)

Embryo

d)

All

197.

Apical dominance which suppresses lateral bud development is caused by what hormone?

a)

auxin

b)

gibberellin

c)

ethylene

d)

imbibition

198.

Which of the following are plant hormones

a)

Auxin

b)

Cytokinin

c)

Gibberellin

d)

Abcissic acid, ethylene

e)

All

199.

Bananas are ripened by which hormone?

a)

Cytokinin

b)

ABA

c)

Ethene

d)

Gibberellin

200.

Which hormone is most likely involved in Mitosis?

a)

Auxin

b)

Cytokinin

c)

ABA

d)

Ethene

201.

Under certain conditions, seeds need to prevent growth of a new plant, for example, when there is a drought and a new plant would not survive. Which hormone is involved in making seeds dormant?

a)

Gibberellin

b)

Auxin

c)

Cytokinin

d)

ABA

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