A change in the amount of yolk and its distribution in the egg will affect
1. formation of zygote
2. pattern of cleavage
3. number of blastomeres produced
4. fertilization

Foetal ejection reflex in human female is induced by
1. pressure exerted by amniotic fluid
2. release of oxytocin from pituitary
3. fully developed foetus and placenta
4. differentiation of mammary glands

Which one of the following is the most likely reason for the regular menstruation cycle not occurring in females?

Seminal plasma in humans is rich in:
1. fructose, calcium and certain enzymes
2. fructose and calcium but has no enzymes
3. glucose and certain enzymes but has no calcium
4. fructose and certain enzymes but is poor in calcium

The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
1. spermatocyte$\to$ spermatogonia$\to$ spermatid $\to$sperms
2. spermatogonia$\to$ spermatocyte $\to$spermatid $\to$sperms
3. spermatid $\to$spermatocyte $\to$spermatogonia$\to$ sperms
4. spermatogonia$\to$ spermatid $\to$spermatocyte $\to$sperms

In humans, at the end of the first meiotic division, the male germ cells differentiate into
1. primary spermatocytes
2. secondary spermatocytes
3. spermatids
4. spermatogonia

Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
1. Chorion
2. Allantois
3. Yolk sac
4. Amnion

Which one of the following statement is incorrect about menstruation?

Which part of the ovary in mammals acts as an endocrine gland after ovulation?