(a) (i) Write the functions of the following parts of human female reproductive system : (I) Ovary (II)…
(a) (i) Write the functions of the following parts of human female reproductive system : (I) Ovary (II) Fallopian tube (III) Uterus (ii) State briefly two contraceptive methods used by human males.
Solution
(a) (i)
(I) Ovary: Produces female gamete (egg) and female ½,½
hormones(oestrogen).
(II) Fallopian tube: Site of Fertilization
(III) Uterus: Site of Implantation and embryonic development.
(ii) Methods of contraception used by males:
• Mechanical barrier - Condoms
• Surgical method – blocking the vas deferens in males
(Vasectomy)
OR
(b) (i)
Self-pollination Cross-pollination
Pollen grains are transferred Transfer of pollen grains from
from stamen to the stigma of the stamen of one flower to the 1+1
same flower. stigma of another flower of
same species.
(ii)
A – Stigma: Receives pollen and provides suitable environment
for its germination.
B –Pollen tube: Carries males germ cells (gametes) to the female
gamete situated in the ovary.
C – Egg Cell (Female germ cell): Fuses with male gamete and forms
zygote.
