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WorksheetsCytokinin
Total questions: 71
Worksheet time: 56mins
which plant hormone produces opposite effects?
dormancy and cotyledons
dormancy and germination
auxin and cytokins
auxins and ethylene
What happens when you place an over ripe banana in a fruit bowl with other fruit?
Nothing will happen
The other fruit will grow in size
Ethylene gas will cause the fruit to grow mold
Ethylene gas will cause the other fruit to ripen
The ovary, style, and the stigma make up the female part of a plant called the ?
stamen
petals
stem
pistil
A process that is a series of chemical reactions to break down food into energy.
Auxin
Cellular Resperation
chloraphyll
day neutral plant
Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. Cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. Which system carries cytokinins produced in the roots to the rest of the plant?
vascular system
dermal system
reproductive system
none of these
Which is an example of a nastic response?
Ivy twisting around another plant
A stem bending towards a light source
A root growing downwards in the soil
A venus flytrap closing
Which hormone causes internodes to lengthen?
Gibberelins
Etiolation
Tropism
Cytokins
If you cut the top off a shoot the plant will
Die
Not grow
Grow straight up
Grow towards the light
Examples of dwarf plants where gibberellins cause rapid growth are
Grapes, Cabbage, Corn
Deciduous trees
Bananas, Avocado
Watermelon, Rockmelon, Honeydew melon
If auxins are released down the stem of a plant, why doesn't the plant also grow on its side?
Because there aren't as many auxins released down the stem of the plant compared to the amount that grow at the top
Because there are vesicles along the walls on the sides of a plant which prevent growth
Because the growing bud at the top of the plant produces auxins at the same time which means growth on the side of the plant stops
Because toxic chemicals kill half of the active auxins in the bud which causes them to kill the others surrounding them. By the time the auxins start moving down the stem, they've already been killed off
May oppose the effects of auxins
abscisic acid
auxin
cytokinins
gibberellin
ethylene
Which one of the following is a Precursor of Gibberellin?
Tryptophan
Kaurene
Zeatin
Methionine
Which of the following is not a characteristics of hormone?
It can works on more than one target organ.
It is protein in nature.
It is transported via the blood stream
It has only a long term effect on the biological system.
The response to stress is called
Stay or Stray Response
Fight or Stay Response
Flee or Stray Response
Fight or Flight Response
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.
I, II and III only.
I, II and IV only.
I, III and IV only.
II, III and IV only.
Which flower shows heliotropism
bougainvilla
rose
sunflower
datura
When creating seedless fruit, what type of flowers are sprayed with ethylene gas?
pollinated
unpollinated
older
small
Where are the body's blood cells produced?
thymus
Bone Marrow
spleen
GALT
The disease fighting protein produced by the body in response to a specific antigen:
antigen
neutrophil
antibody
monocyte
Ringworm is an example of which type of infectious agent?
Bacteria
Virus
Fungi
Protozoa
Which of the following statements best reflects the role of the nonspecific immune system?
it is designed to finish the job that the specific immune system started
it is designed as a first line of defense against microorganisms
it is designed to deal with microorganisms that the specific immune system can't deal with
it is designed to deal only with microbes that are not a threat to the body
antibodies
start a series of chemical reactions to kill pathogens
produce antigens
alert phagocytes
produce lymphocytes
It is a white blood cell that engulfs and destroys pathogens
by breaking them down.
b cell
phagocyte
T cell
antigen
Pulses usually lack amino acids
Methionine and tryptophan
Cysteine and tryptophan
Cysteine and methionine
methionine
Which part is most suitable for raising virus free plants in micropropagation ...
a) Bark
b) Meristem
c) Node
d) Vascular tissue
Cod liver oil is rich in
a) B vitamin
b) K vitamin
c) A and D vitamins
d) C vitamin
Cross between two species of the same genus is ...
Intraspecific hybridisation
Intervarietal hybridisation
Interspecific hybridisation
Intergeneric hybridisation
Biogas predominently comprises ...
CH4, N2 and H2
CH4 and CO
CH4 and CO2
CH4 and NO2
In tissue culture, callus can be induced to form shoot or root by altering the ratio of ...
Auxin to cytokinin
Gibberellin to cytokinin
Auxin to gibberellin
Ctokinin to ethylene
Pusa Komal variety of cow pea is resistanat to disease .
White rust
Leaf curl
Bacterial blight
Hill bunt
Which of the following is mainly produced by the activity of aerobic bacteria on sewage ...
Propane
Laughing gas
Marsh gas
Mustard gas
Select the correct statement from the following ...
Methanobacterium is an aerobic bacteria found in rumen of cattle
Biogas commnly called gobar gas in pure methane
Activated sludge sediment in settlement tanks of sewage treatment plant is rich source of aerobic bacteria
Biogas is produced by the activity of aerobic bacteria on animal waste
Secondary sewage tretment is mainly a ...
Biological process
Chemical process
Mechanical process
Physical process
Yield of Paddy field can be increased by application of ...
Iron bacteria
Nostoc/ Anabaena
Archaebacteria
Symbiotic bacteria
Pasteurisation is heating at ..
120° for 60 minutes
60° - 63° C for thirty minutes
70°C for 60 minutes
80° for 30 minutes
hormones that works antagonostically to auxin and gibberelin, it preserves plants from harsh environment condition is
A. abscisic acid
B. traumatin
C. cytokinins
D. ethylene
A big tree falls in a forest, but its roots are still in contact with the soil. The branches of this fallen tree grow straight up (vertically). This happens in response to
Water and light
Water and minerals
Gravity and water
Light and gravity
Iodine is necessary for the synthesis of which of the following hormone?
Adrenaline
Auxin
Thyroxine
Insulin
A doctor advised a person to take injection of insulin because his:
Blood pressure was high
Heart beat was high
Blood sugar was high
Thyroxine level in blood was high
Growth hormone is produced by
Adrenal
Pituitary
Pancreas
Thyroid
A person consuming sea food is least likely to develop
Diabetes
Goiter
Both A and B
Heart Diseases
Synaptic vesicles discharge _________ at the neuromuscular junction.
Acetylcholine
Adrenaline
Estradiol
Testosterone
Junction between two neurons is called ___________________
Synapse
Neuromuscular junction
Epinephrine
Interneuron
When the process of mitosis is complete, each daughter cell has:
half as many chromosomes as the parent cell.
twice as many chromosomes as the parent cell.
one-fourth as many chromosomes as the parent cell.
the same number of chromosomes as the parent cell.
These cells are the most abundant & not specialized.
Parenchyma
Collenchyma
Sclerenchyma
These cells have thicker primary walls & form bundles. Their thickness is uneven.
Parenchyma
Collenchyma
Sclerenchyma
These cells have thick secondary cell walls & form fibers & sclereids.
Parenchyma
Collenchyma
Sclerenchyma
What type of roots are these?
Fibrous Roots
Tap Roots
Prop Roots
Aerial Roots
These types or roots are __________ & they are usually found in ________ areas.
pneumatophores/dry
pneumatophores/wet
aerial/dry
aerial/wet
A morning dew is often caused by ___________ root pressure & is called ___________.
+/exudation
-/guttation
-/xylomatic flow
+/guttation
GMO tomatoes are now available in some stores. These organisms are modified to what?
Taste Better
Ripen Quicker
Be Resistant to Damage
Not Produce Ethylene
What causes the shoot of a plant to grow towards light?
What causes the shoot of a plant to grow towards light?
The shoot needs to grow longer to avoid competition for light
The shoot needs to grow longer to avoid competition for light
The concentration of auxin is higher in cells exposed to light
In the warm southwest United States rabbits are brown and have long ears. In polar regions rabbits are white and have shorter ears.Why do rabbits from polar regions have white fur?
The white fur is more attractive.
The white fur camouflages them in the snow.
The white fur reflects more light warming the rabbit.
The white fur makes the rabbits stand out in the snow.
Warblers are birds that live in Georgia. They leave Georgia during the winter and fly to places that are warmer. After winter is over, they fly back to Georgia. What is this called?
camouflage
hibernation
migration
mimicry
A stimulus is any change in the environment of an animal. Animals respond to a stimulus in order to keep themselves safe and healthy. Animals that do not respond to a stimulus do not survive for long.
Think about a day in the life of this rabbit. Which behavior would be a response to a stimulus in the rabbit's environment?
Hopping through the woods.
Nibbling clover in the field next to the woods.
Staying completely still when a predator runs by.
Returning to the rabbit hole at the end of the day.
The koala is an animal native to Australia. Despite the popular name, koala bear, they aren't bears, but marsupials like kangaroos, that keep their newborns in a stomach pouch.
They have developed very differently than other marsupials, in part because they spend most of their lives in the eucalyptus trees that serve as their main source of food.
What adaptation helps them lead this tree bound life?
The use of pouches to hold koala newborns.
Grey fur that keeps them hidden from predators.
Hands, feet, and claws that are perfect for gripping branches.
Distinct calls they use to communicate potential danger to one another.
Examine this photograph of a bird. Note that the beak of this bird is short and very strong. What type of food is a bird with kind of beak likely to eat?
fish
insects
worms and grubs
nuts and tough fruits
What adaptation helps protect a cactus against herbivores?
spines
deep roots
waxy stems
succulent leaves
Night blooming flowers are generally dull in color as pollinators cannot able to see the color in the dark
true
false
