5.2.1 The Leaf: Adaptations for Photosynthesis

Question 1

upper epidermis

Answer 1

• the thin layer of cells on the upper surface of the leaf

Question 2

cuticle

Answer 2

• waxy waterproof layer that is secreted by the upper epidermis

Question 3

mesophyll

Answer 3

• cells in the middle section of the leaf. Within the mesophyll are veins that run continuously throughout the plant

Question 4

chloroplasts

Answer 4

• organelles that contain light-absorbing pigments called chlorophyll.

Question 5

lower epidermis

Answer 5

• the layer of cells on the underside of the leaf

Question 6

stoma

Answer 6

• openings found within the lower epidermis. Each opening is formed by two guard cells. Carbon dioxide is able to enter the leaf through the stomata. Water evaporates from the mesophyll and out of the stomata.
  Water from the veins then moves up to replace the water that evaporated.

Question 7

The major site of photosynthesis in plants occurs in the

Answer 7

• the leaf

Question 8

Chloroplasts are mostly located in the __________.

Answer 8

• mesophyll

Question 9

The mesophyll of the leaf

Answer 9

• is a tissue composed of cells separated by numerous air spaces

Question 10

True or false?

The cuticle is also referred to as the upper epidermis.

Answer 10

• false

Question 11

Which statment regarding stomata is false?

Answer 11

• Stomata allow for uptake of water vapor from the atmosphere

Question 12

Carbon dioxide is taken in and water vapor and oxygen are released through the

Answer 12

• stoma