Plants and Food

Question 1

Spongy Mesophyll

Answer 1

This layer contains cells with chloroplasts and is a major site of photosynthesis.

Question 2

Wax Cuticile

Answer 2

A thin, waxy layer that covers the upper epidermis of the leaf, preventing the loss of water.

Question 3

Lower Epidermis

Answer 3

A single layer of cells that contain stomata and guard cells.

Question 4

Stomata

Answer 4

An opening in the lower epidermis that allows carbon dioxide into the leaf and water and oxygen out of the leaf. Transpiration is the loss of water by a leaf.

Question 5

Why does the plant need glucose?

Answer 5

Plants can turn glucose produced in photosynthesis into starch for storage, and turn it back into glucose when it is needed for respiration.

Question 6

What can the plant use the glucose for?

Answer 6

Some glucose is used for respiration and some is used to make cellulose and proteins such as enzymes and chlorophyll.

Question 7

What is photosynthesis?

Answer 7

Light energy converted into a chemical store of energy. This happens in chloroplasts. The pigment chlorophyll ‘captures’ the light energy.

Question 8

Formula

Answer 8

6CO2 + 6H2O —–> C6H12O6 + 6O2

carbon dioxide + water –> glucose + oxygen

Question 9

Palisade Mesophyll

Answer 9

This layer contains long columnar cells that are packed tightly together. These cells contain chloroplasts and are the main cells carrying out photosynthesis.