Nutrition in Flowering plants (Part 2)

Question 1

Palisade mesophyll

Answer 1

With many chloroplast at the upper part of the leaf.

To absorb maximum sunlight for maximum rate of photosynthesis

Question 2

Spongy mesophyll

Answer 2

Contains chloroplasts, to carry out photosynthesis.

With intercellular airspace for diffusion of gases

Question 3

Intercellular space (air space)

Answer 3

To allow diffusion of gases
- carbon dioxide diffuses into leaf
- oxygen and water vapour diffuses out of leaf

Question 4

Stomata

Answer 4

During photosynthesis, oxygen diffuses out of the leaf, carbon dioxide into leaf

More stomata is found at the lower epidermis because less water vapour will be loss at the cooler, shady, underside of the leaf

Question 5

Guard cell

Answer 5

Controls opening and closing of stoma

Contain chloroplast to carry out photosynthesis

Question 6

Lower epidermis and upper epidermis

Answer 6

To protect the inner layer of cells

Question 7

Xylem

Answer 7

To transport water and mineral salt to the leaf

Provide mechanical support

Question 8

Phloem

Answer 8

Transport food to other parts of the plants

Question 9

Cuticle

Answer 9

Waxy and waterproof to prevent excessive water loss