Parts Of A Leaf

Question 1

air space

Answer 1

intercellular gaps within the spongy mesophyll.

These gaps are filled with CO2 and water vapor

Question 2

Lower epidermis

Answer 2

Covers the lower surfaces of the leaf.

• single layer of tightly-packed cells
• mediates exchanges between the plant and its environment, limiting water loss, controlling gas exchange, transmitting sunlight for photosynthesis, and discouraging herbivores.

Question 3

Upper epidermis

Answer 3

Covers the upper surfaces of the leaf.

• single layer of tightly-packed cells
• mediates exchanges between the plant and its environment, limiting water loss, controlling gas exchange, transmitting sunlight for photosynthesis, and discouraging herbivores.

Question 4

Stoma (stomata)

Stoma is singular/ stomata is plura

Answer 4

Openings which regulate water loss, O2 release, and CO2 intake

Question 5

Guard Cells

Answer 5

Sausage shaped cells are pairs of epidermal cells that surround the stoma that changes shape to open/close stoma

Question 6

Spongy Layer

Answer 6

Temporary storage of sugars and amino acids synthesized in the palisade layer.

They also aid in the exchange of gases between the leaf and the environment

Question 7

Air space

Answer 7

These are large air spaces in the spongy Mesophyll that help move Carbon dioxide around the leaf

Question 8

Chloroplast

Answer 8

Where photosynthesis takes place

Question 9

Palisade Mesophyll

Answer 9

Contains the chlorophyll

Mesophylls are the internal ground tissue present in leaves.

There are two types of mesophyll cells in the leaves namely palisade mesophyll and spongy mesophyll.

Mesophyll cells are provided with a large number of chloroplast.

Photosynthesis occurs in the chloroplast.

Hence mesophyll cells of leaves are the principal center of photosynthesis.

Question 10

Cuticle

Answer 10

• The outer thick waxy covering of theplants and leaves.
• Cuticle protects plant from dryingout by reducing water loss.
• Does not let oxygen or carbon dioxide pass through it

Question 11

Spongy Mesophyll

Answer 11

irregularly shaped cells with many air spaces between the cells.

Communicates with the guard cells to open and close depending on the concentration of CO2 and O2

Question 12

Vein (vascular bundles

Answer 12

provide support for leaf and transport of food/water