plants pg89

Question 1

What is the primary function of leaves?

Answer 1

Photosynthesis and water loss during transpiration

Question 2

What attaches the leaf blade to the stem?

Answer 2

Petiole

Question 3

What types of vascular tissue are found in leaves?

Answer 3

Xylem and phloem

Question 4

What is the outermost layer of the leaf that protects it from damage?

Answer 4

Epidermis

Question 5

What does the upper epidermis have that helps reduce water loss?

Answer 5

Waxy cuticle

Question 6

Do epidermal cells contain chloroplasts?

Answer 6

No

Question 7

What are the two layers of mesophyll in a leaf?

Answer 7

• Palisade mesophyll layer
• Spongy mesophyll layer

Question 8

What is the role of the palisade mesophyll layer?

Answer 8

Contains elongated cells for photosynthesis

Question 9

What is the function of the spongy mesophyll layer?

Answer 9

Contains rounded cells with air spaces for gas exchange

Question 10

Where are vascular bundles located in the leaf?

Answer 10

Within the mesophyll

Question 11

What does xylem transport in the leaf?

Answer 11

Water and minerals

Question 12

What is the role of lignin in the xylem vessels?

Answer 12

Strengthens the leaf

Question 13

What does phloem transport from the leaf?

Answer 13

Food made in the leaf

Question 14

What surrounds the stomata in the epidermis?

Answer 14

Guard cells

Question 15

What is the function of guard cells?

Answer 15

Open and close the stomata

Question 16

Fill in the blank: The leaf blade is attached to the stem by the _______.

Answer 16

Petiole

Question 17

True or False: The upper epidermis contains chloroplasts.

Answer 17

False

Question 18

What do chloroplasts in mesophyll cells carry out?

Answer 18

Photosynthesis

Question 19

What is the primary component of the upper half of the vascular bundle?

Answer 19

Xylem

Question 20

What is the primary component of the lower side of the vascular bundle?

Answer 20

Phloem