Formative Practice 3.2 (Form 5 Biology Textbook Exercise and Answer)

Question 1:
What tissues form the root?

Answer:
Epidermal tissue, cortex tissue, vascular tissue and endodermis tissue.

Question 2:
Explain the adaptations of root epidermal cells to carry out their functions in the absorption of water and mineral salts.

Answer:
Adaptations of the epidermal tissue of the root:
• Epidermal cells are closely arranged
• Thin cell walls and water-permeable cell membranes facilitate water movement in their roots.
• There are epidermal cells which form roots hair by elongating towards lateral sides from the outer walls.
• The root hair cells are not layered with cuticle.
• The roots hair cells also have big vacuoles to store water and mineral salts.

Question 3:
Compare monocot and eudicot roots in terms of cortex tissues, endodermis tissues and Casparian strip.

Answer:
Cortex tissues are between the epidermis and the vascular cyclinder in dicot roots and monocot roots. Casparian strips while not all roots in eudicots have Casparian strips.