Free Printable 2.2 Gas Exchange in Plants

Worksheets

2.2 Gas Exchange in Plants

Total questions: 22

Worksheet time: 13mins

Name

Class

Date

The leaf has a shiny, waxy cuticle around it to

increase the rate of photosynthesis

attract more light

control water loss

stop carbon dioxide and oxygen gases escaping

Most of the chloroplast cells are found in the

upper epidermis

pallisade mesophyll layer

lower epidermis

stomata

The water needed for photosynthesis comes into the leaves through the

upper epidermis

stomata

guard cells

xylem cells

The important gases, carbon dioxide and oxygen, enter and leave the leaf through the

upper epidermis

phloem

stomata

guard cells

The reactants needed for photosynthesis to occur are:

carbon dioxide & water

carbon dioxide & oxygen

oxygen & water

carbon dioxide, oxygen & water

The role of the guard cell is to

help control the temperature of the plant

control how much water enters the leaf

control how much glucose is stored

control the movement of water vapour & gases

Plants need to take in oxygen gas for respiration

only at night

only during the day

both during the day & the night

Which structures open and close stomata to allow gas exchange but prevent water loss in leaves?

Epidermis

Vascular tissue

Guard cells

Spongy mesophyll

What is letter "A" pointing to?

cuticle

upper epidermis

lower epidermis

palisade mesophyll

10.

What is letter "D" pointing to?

upper epidermis

palisade mesophyll

spongy mesophyll

bundle sheath

11.

Which of the following is pointing to the "guard cell"?

12.

Which part of the leaf consists of xylem and phloem?

vascular bundle

bundle sheath

palisade mesophyll

spongy mesophyll

13.

The outermost layer of CELLS of the leaf is the

cuticle

epidermis

spongy mesophyll

bundle sheath

14.

This layer of cells is where photosynthesis occurs within the leaf; there are air spaces within this layer

spongy mesophyll

palisade mesophyll

chloroplast

upper epidermis

15.

The cell organelle where photosynthesis occurs in plant cells is the

chloroplast

mitochondrion

vacuole

nucleus

16.

The majority of the stomata of a leaf can usually be found within the

guard cells

upper epidermis

lower epidermis

cuticle

17.

A plant that grows only on or in water.

pondweed

salamander

wetlands

hydrophyte

18.

Plants with spines and waxy leaves are well suited for life in which environment?

Desert

Temperate forest

Grassland

Tropical Rainfroest

19.

What part of the plant absorbs oxygen?

stem

roots

leaves

flower

20.

Deserts are hot and dry so an example of a plant adaptation here is...

long and deep root systems to absorb ground water

plants grow on each other to reach sunlight

dark in color to absorb sunlight

grow on each other to protect from wind

21.

How do xerophytes reduce water loss?

Pitted/sunken stomata

Hairs to trap moisture

Curled leaves with thick cuticle to trap moisture

All of the above

22.

How are hydrophytes adapted to on water?

Most stomata on upper epidermis

Most stomata on lower epidermis

No stomata at all

Stomata in equal numbers on upper and lower epidermis

Reset

2.2 Gas Exchange in Plants

Total questions: 22

Worksheet time: 13mins

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