Question

answer the following question
a) how is zygote formed
b) state the function of placenta in mother's body
c) at what intervals the egg is formed in human female's ovary
d) name two STDs caused by bacterial infection
e) why is prenatal sex determination prohibited

Answer 1

A) After the fusion of male and female gamate , the zygote is formed.

B) Placenta performs the function of transporting nutrients from mother to embryo

C) In human female egg is formed at the foetal stage.

D) To prevent female foeticide prenatal sex is prohibited.

Answer 2

Answer:

(a) Zygote is formed by the fusion of male and female gamete.

(b).Placenta is a special tissue through which the developing embryo/foetus gets nutrition from mother's blood. It also transports wastes of the embryo into mother's blood.

(c) Ovulation releases mature ovum from the ovary . It happen once during a menstrual cycle that is for roughly 28 days.

(d) STDs caused by bacterial infection are gonorrhoea and syphilis or aids.

(e) prenatal sex determination is misused and it may be the reason for female foeticide.