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Leaf structure and function

Total questions: 18

Worksheet time: 9mins

Name
Class
Date
1.
What is photosynthesis?
a)
Water loss by a plant.
b)
When a photographer takes a photo.
c)
To get your pictures from the photo lab.
d)
The process in which plants make their food.
2.
Which organelle from the plant cell is primarily responsible for converting sunlight to energy?
a)
Mitochondria
b)
Nucleus
c)
Vacuole
d)
Chloroplast
3.

What is the name of the clear layer of cells (H) on top of the leaf?

a)

Cuticle

b)

Air space

c)

Guard cell

d)

Upper epidermis

4.
The leaf has a shiny, waxy cuticle around it to
a)
increase the rate of photosynthesis
b)
attract more light
c)
control water loss
d)
stop carbon dioxide and oxygen gases escaping
5.

What is the name of the tall and long, packed cells (part G) directly under the upper epidermis?

a)

Palisade cells

b)

Guard cell

c)

Spongy layer

d)

Lower epidermis

6.

What is the name of cells (part D) that surround the pores of a leaf?

a)

Palisade cells

b)

Guard cell

c)

Spongy layer

d)

Lower epidermis

7.
The role of the guard cell is to
a)
help control the temperature of the plant
b)
control how much water enters the leaf
c)
control how much glucose is stored
d)
control the movement of water vapour & gases 
8.

If guard cells are swollen with water, then they are more likely to be ...

a)

OPEN with stomata

b)

CLOSED with no stomata

c)

Cannot tell - the water amount doesn't affect it at all.

9.

Which carries water and minerals from roots to other parts of the plant?

a)

xylem

b)

phloem

c)

stoma

d)

guard cell

10.

When water evaporates out of the leaf's stomata it is called

a)

photosynthesis

b)

transpiration

c)

transport

d)

xylem

11.
Transpiration helps the plant
a)
make more sugars at night
b)
move water from the roots to the stem and leaves
c)
move sugars from the leaf to be stored in the stem & roots
d)
make more chloroplasts
12.
Which cells of a leaf undergo the MOST photosynthesis?
a)
Guard cells
b)
Palisade cells
c)
Epidermal cells
d)
Cells in the spongy layer
13.
Most plants appear green because chlorophyll
a)
absorbs green light.
b)
absorbs violet light.
c)
reflects green light.
d)
does not absorb violet light.
14.
What is chlorophyll's main function?
a)
to make the plant a vegetable
b)
to blend into their environment
c)
to capture energy from sunlight for photosynthesis
d)
to help prevent water loss
15.
In a chemical equation, which is true? 
a)
reactants--> products 
b)
products--> reactants
16.
Plants need ________ as a reactant for photosynthesis.
a)
oxygen
b)
soil
c)
carbon dioxide
d)
sugar
17.
Carbon dioxide enters plant leaves through the __________.
a)
stomata
b)
chloroplasts
c)
xylem
d)
cuticle
18.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water

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