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Worksheets

Tropisms and Phototropism

Total questions: 38

Worksheet time: 47mins

Name
Class
Date
1.

Which plant would be stiff and rigid?

a)

A

b)

B

2.

Which plant would be wilted or limp?

a)

A

b)

B

3.

What is the force inside the central vacuole called?

a)

The Force

b)

Turgor Pressure

c)

Water Pressure

d)

Thigmotropism

4.

Which plant would be stiff and rigid?

a)

The plant with the full vacuole in the cell

b)

The plant with the empty vacuole in the cell

c)

All plants the water in the vacuole does not matter

5.

This plant will most likely be _______________.

a)

Limp or wilted

b)

stiff and rigid

6.

This plant would most likely be __________________.

a)

Limp or wilted

b)

Stiff and rigid

7.

Which cell shows a plant that is stiff and rigid?

a)

The cell on the left

b)

The middle cell

c)

The cell on the right

8.

Which plant would most likely be wilted and limp (sad)?

a)

The cell on the left

b)

The cell on the middle

c)

The cell on the right

9.

Vines that are growing on a tree exhibit (show)

a)

Hydrotropism

b)

Geotropism / Gravitropism

c)

Thigmotropism

d)

Phototropism

10.

Plants following the sun exhibit (show)

a)

Phototropism

b)

Geotropism

c)

Hydrotropism

d)

Thigmotropism

11.

The plant is following the light.

a)

Phototropism

b)

Thigmotropism

c)

Hydrotropism

d)

Geotropism

12.

Gravitropism and ______________________ are the same thing.

a)

Geotropism

b)

Phototropism

c)

Thigmotropism

d)

Triangular Prism

13.

What is this process called?

a)

Germination

b)

Starvation

c)

Plant Growth

d)

Thigmotropism

14.

Germination is ...

a)

when a seed becomes a plant

b)

when a plant grows from 1 foot to 2 feet

c)

when a tree becomes a firewood

d)

when a plant becomes a tree

15.

Plants reacting to gravity is called:

a)

Phototropism

b)

Geotropism/Gravitropism

c)

Germination

d)

Thigmotropism

16.

Wilting is a plant's response to:

a)

High turgor pressure

b)

Low turgor pressure

c)

Gravity

d)

Sunlight

17.

When plants grow in towards the light, this is called:

a)

Phototropism

b)

Geotropism

c)

Germination

d)

Thigmotropism

18.

Turgor pressure is a result of water in what plant cell organelle?

a)

Mitochondrion

b)

Nucleus

c)

Cell wall

d)

Vacuole

19.

True or False? Plants have tissues and organs.

a)

True

b)

False

20.

True or false? These seeds are alive.

a)

True

b)

False

21.

What term refers to a plant growing or moving away from a stimulus?

a)

Touch

b)

Dormancy

c)

Tropism

d)

Development

22.

Through which process do plants obtian energy?

a)

Transpiration

b)

Respiration

c)

Photosynthesis

d)

Precipitation

23.
Which of the following is NOT a difference in a the plant and animal cells?
a)
Chloroplasts
b)
Cell Wall
c)
Cell membrane
d)
Size of vacuole
24.
Plant’s roots grow down, anchoring it into the soil. To what stimulus is the plant responding?
a)
thigmotropism
b)
hydrotropism
c)
phototropism
d)
geotropism
25.
What force or substance causes turgor pressure?
a)
light
b)
gravity
c)
glucose
d)
water
26.
What force allows a plant to become more rigid and stand upright?
a)
turgor pressure
b)
geotropism
c)
photosynthesis
d)
phototropism
27.
A plant's root grow in a downward direction in response to what force? 
a)
sunlight
b)
gravity
c)
soil
d)
turgor pressure
28.
Why do plants wilt?
a)
low turgor pressure
b)
high turgor pressure
c)
too much water
d)
no cell membrane
29.

What are the levels of organization in plants?

a)

Plants have cells, but not tissues.

b)

Plants are made up of cells, tissues, organs, and organ systems

c)

Plants contain cells and tissues, but not organs.

30.

What is the function of the plant organelle called the vacuole?

a)

The vacuole stores water, nutrients, and waste.

b)

The vacuole produces proteins.

c)

The vacuole stores DNA.

31.

What is the main function of the chloroplast cell organelle?

a)

The chloroplast organelle's main function is to produce green pigment.

b)

The chloroplast organelle's main function is to convert light energy into chemical energy through photosynthesis.

c)

The chloroplast organelle's main function is to produce DNA

32.

___________________________ is growth that happens in organisms in response to light, such as a stem bending toward a light source.

a)

transpiration

b)

gravitropism

c)

phototropism

33.

A houseplant is placed on a window sill that gets direct, bright sunlight every afternoon. The plant starts to grow toward the window. What kind of response is described by this situation?

a)

Gravitropism

b)

A negative response to a stimulus

c)

Gravitropism

d)

Phototropism

34.

Which homeostasis mechanism is the plant version of an animal drinking when it gets thirsty?

a)

A plant's growth response toward light

b)

A plant's growth response to gravitation

c)

A plant wilting when the soil dries out

d)

A plant making sugar through photosynthesis

35.

Stimulus refers to _____.

a)

food that gives your body energy

b)

a thing or event that causes a reaction

c)

outside reactions that monitor your bodily systems

36.

_________________ is something that causes a response from an organism.

a)

geotropism

b)

emergence

c)

stimulus

d)

water

37.

When the plant cells contain a lot of water, the water exerts force on their cell walls. This force is called _____________________>

a)

force pressure

b)

transpiration

c)

turgor pressure

d)

out side pressure

38.

Germination occurs when the plant embryo uses stored food and begins to grow again. The force of the growing embryo causes it to push out of the seed. This is known as ___________________.

a)

emergence of a seedling

b)

tropism

c)

photoperiodism

d)

dormancy