$(a)$ Give the functions of the following :
$(i)$ Pollen Tube
$(ii)$ Ovary
$(b)$ List any two changes observed in the body of a female during puberty.

(N/A) $(i)$ The function of the pollen tube is to provide a pathway for the male gametes to travel from the stigma to the ovule for fertilization.
$(ii)$ The function of the ovary is the production of female gametes (ova) and the secretion of female sex hormones like estrogen and progesterone.
$(b)$ Two changes observed in the body of a female during puberty are:
$(i)$ Development and enlargement of mammary glands (breasts).
$(ii)$ Onset of the menstrual cycle (menarche).