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leaf structures

Total questions: 20

Worksheet time: 16mins

Name
Class
Date
1.
The water needed for photosynthesis comes into the leaves through the
a)
upper epidermis
b)
stomata
c)
guard cells
d)
xylem cells
2.
The important gases, carbon dioxide and oxygen, enter and leave the leaf through the
a)
upper epidermis
b)
phloem
c)
stomata
d)
guard cells
3.
Which structures open and close stomata to allow gas exchange but prevent water loss in leaves?
a)
Epidermis
b)
Vascular tissue
c)
Guard cells
d)
Spongy mesophyll
4.
Which structure helps prevent water loss and protects the leaf?
a)
Palisades mesophyll
b)
Spongy mesophyll
c)
Vascular tissue
d)
Cuticle
5.

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

a)

Palisade cells

b)

Guard cell

c)

Spongy layer

d)

Lower epidermis

6.

The column-like cells that lie directly underneath the epidermis makes up the

a)

spongy mesophyll

b)

palisade mesophyll

c)

cuticle

d)

bundle sheath

7.

What is letter "A" pointing to?

a)

cuticle

b)

upper epidermis

c)

lower epidermis

d)

palisade mesophyll

8.

What is letter "D" pointing to?

a)

upper epidermis

b)

palisade mesophyll

c)

spongy mesophyll

d)

bundle sheath

9.

Which number is pointing to the xylem of the leaf?

a)

3

b)

4

c)

5

d)

6

10.

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

a)

B

b)

C

c)

D

d)

E

11.

Which number is pointing to the stomata?

a)

6

b)

7

c)

8

d)

9

12.

Which part of the leaf consists of xylem and phloem?

a)

vascular bundle

b)

bundle sheath

c)

palisade mesophyll

d)

spongy mesophyll

13.

Most photosynthesis occurs in this part of the leaf:

a)

upper epidermis

b)

cuticle

c)

palisade mesophyll

d)

spongy mesophyll

14.

The outermost layer of CELLS of the leaf is the

a)

cuticle

b)

epidermis

c)

spongy mesophyll

d)

bundle sheath

15.

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

a)

spongy mesophyll

b)

palisade mesophyll

c)

chloroplast

d)

upper epidermis

16.

The cell organelle where photosynthesis occurs in plant cells is the

a)

chloroplast

b)

mitochondrion

c)

vacuole

d)

nucleus

17.

The vascular tissue which transports sugar (food) in both directions within the leaf is the

a)

xylem

b)

phloem

c)

bundle sheath

d)

chloroplast

18.

Which two layers of the plant contain chloroplasts?

a)

xylem and phloem

b)

upper and lower epidermis

c)

cuticle and upper epidermis

d)

palisade and spongy mesophyll

19.

Which number is pointing to the vein or vascular bundle of the leaf?

a)

2

b)

3

c)

4

d)

7

20.

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

a)

guard cells

b)

upper epidermis

c)

lower epidermis

d)

cuticle