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Gases Exchange in Plants

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

How do plants breathe?

a)

Through the stem

b)

Through the stomata

c)

Through the chloroplast

2.
In which part of the cell does photosynthesis take place?
a)
vacuole
b)
mitochondria
c)
cell wall
d)
chloroplast
3.

What gas is needed in order to perform respiration at the cellular level?

a)

oxygen

b)

carbon dioxide

c)

hydrogen

d)

nitrogen

4.

Rate of transpiration is low in

a)

.water plants

b)

Forest plant

c)

Desert plant

d)

All of the above

5.

What do the plants release during the respiration?

a)

Oxygen

b)

O2

c)

Carbon Dioxide

d)

CO2

6.

When zoom into a leaf, structure as shown. Name B which can open and close for gaseous exchange in plants.

a)

Lenticel

b)

Stoma

c)

Guard cell

d)

Chloroplast

7.

What is the chemical equation for cellular respiration?

a)

Glucose + Oxygen -> Carbon dioxide + Water + Energy

b)

Oxygen + Carbon dioxide + Energy -> Glucose + Water

c)

Carbon dioxide + Glucose -> Oxygen + Water + Energy

d)

Water + Carbon dioxide + Energy -> Oxygen + Glucose

8.
What is the equation for photosynthesis? 
a)
Water + Carbon dioxide + Energy -> Oxygen + Glucose
b)
Carbon dioxide + Glucose -> Oxygen + Water + Energy
c)
Oxygen + Carbon dioxide + Energy  -> Glucose + Water
d)
Glucose + Oxygen -> Carbon dioxide + Water + Energy
9.
Cellular respiration is similar in both plants and animals in what way?
a)
Energy is required and oxygen is released.
b)
Nitrogen is required and energy is released.
c)
Oxygen is required and energy is released.
d)
Oxygen is required and carbon is released.
10.
How do water enter the roots from the soil?
a)
diffusion
b)
osmosis
c)
transpiration
d)
active transport
11.
This is the definition for which word:The movement of particles down a concentration gradient (from a high concentration to a low concentration)
a)
Osmosis
b)
Diffusion
c)
Active transport
d)
Transpiration
12.
This is the definition for which word:The movement of water molecules from a high concentration of water to a low concentration of water across a partially permeable membrane.
a)
Osmosis
b)
Diffusion
c)
Active transport
d)
Transpiration
13.
Why is the evaporation of water from leaves important?
a)
It cools leaves and helps move water up the plant.
b)
It makes the plant wilt
c)
It helps the plant to respire
14.
Osmosis is the diffusion of _____ across a selectively permeable membrane.
a)
food
b)
air
c)
water
d)
oxygen
15.

Parts of plants that provide a large surface area for gaseous exchange

a)

Leaves

b)

Stems

c)

Roots

d)

Flowers

e)

Fruits

16.

Plan taking in oxygen and giving out Carbon dioxide

a)

During the day

b)

During the night

17.

Stoma is bounded by a pair of...

(a)  

18.

Stomata of plants closed when

a)

Photosynthesis occur

b)

Presence of light

c)

No lights at the surrounding

d)

Plant loses a lot of water

19.

Effects of pollutants from factories and vehicles

(a)  

20.

Effects of haze and dust on the survival of plants

a)

Reduce sunlight intensity

b)

Reduce rate of photosynthesis

c)

Stoma clogged with dust

d)

Increase acidity

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