A) A specialised cell is a cell which is modified to perform a specific function.

a) A specialised cell is a cell which is modified to perform a specific function.

b)

• (i) C: Sperm cell
• (ii) N: Nerve cell
• (iii) E: Mesophyll cell
• (iv) R: Root hair cell

c)

• Cell C (Sperm cell): Has a long tail (flagellum) which enables it to swim towards the egg for fertilisation.
• Cell N (Nerve cell): Has a long axon to transmit electrical impulses rapidly over long distances. It also has dendrites to receive signals.
• Cell R (Root hair cell): Possesses a long, thin extension that increases its surface area for efficient absorption of water and mineral salts from the soil.