Identify the coleorhiza, name two substances transported by root hairs, and classify two plants. Also, state two functions of oxytocin in females.

10. a) On diagram Q, the coleorhiza is the protective sheath covering the embryonic root (radicle), located at the lower end of the embryo.

b) Two substances transported along the paths labelled L (root hairs) in diagram R are:

i) Water

ii) Mineral salts

c) Classification of the two plants:

	SUBDIVISION	SUB-DIVISION	CLASS
PLANT Q	Angiospermatophyta	X	Monocotyledoneae
PLANT R	Angiospermatophyta	X	Monocotyledoneae

11. a) Two functions of oxytocin hormone in females are:

i) It stimulates contractions of the uterine muscles during childbirth.

ii) It causes milk ejection (let-down) from the mammary glands during breastfeeding.