Formative Practice 2.1 (Form 5 Biology Textbook Exercise and Answer)

Question 1:
Name two external structures of a leaf.

Lamina and petiole

Question 2:
What is the importance of cuticle in leaves?

To prevent excessive loss of water through evaporation.

Question 3:
Name five internal structures of a leaf.

Upper epidermis, palisade mesophyll, spongy mesophyll, vascular bundle and lower epidermis.

Question 4:
State the functions of xylem and phloem.

Xylem – to transport water and mineral salts absorbed from the roots to the leaves.

Phloem – to transport organic substances produced during photosynthesis from the leaves to other parts of the plants.

Question 5:
The layer of cuticle and upper epidermis is transparent. Justify.

To allow sunlight to pass through it for photosynthesis.

Question 6:
Compare the layers of palisade mesophyll and spongy mesophyll.

Palisade mesophyll – Contains many and chloroplasts and closely arranged.
Spongy mesophyll – Contains less number of chloroplast and loosely arranged.

Leave a Comment