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 pitutary

3. fully developed foetus and placenta

4. differentiation of mammary glands

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

1. Fertilisation of the ovum

2. Maintainance of the hypertrophical endometrial lining

3. Maintainance of high concentration of sex-hormones in the blood stream

4. Retention of well-developed corpus luteuin

Given below is a diagrammatic sketch of a portion of human male reproductive system.

Select the correct set of the names of the parts labelled A, B, C, D.

         A                         B                             C                                    D

1. Ureter                Prostate                 Seminal vesicle              Bulbourethral gland

2. Vas deferens       Seminal vesicle       Prostate                        Bulbourethral gland

3. Vas deferens       Seminal vesicle       Bulbourethral gland        Prostate

4. Ureter                Seminal vesicle       Prostate                        Bubourethral gland

The correct sequence of spermatogenetic stages leading to the formation of sperms in a

mature human testis is

1. spermatocyte - spermatogonia - spermatid - sperms

2. spermatogonia - spermatocyte - spermatid -sperms

3. spermatid-spermatocyte-spermatogonia -sperms

4. spermatogonia-spermatid-spermatocyte -sperms

In humans, at the end of the first meiotic division, the male germ cells differentiate into

the 

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?

1. During normal menstruation about 40 mL blood is lost

2. The menstrual fluid can easily clot

3. At menopause in the female, there is especially abrupt increase in gonadotropic

hormones

4. The beginning of the cycle of menstruation is called menarche

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

1. Graafian follicle

2. Stroma

3. Germinal epithelium

4. Vitelline membrane

In the human female, menstruation can be deferred by the administration of:

1. LH only

2. Combination of FSH and LH

3. Combination of estrogen and progesterone

4. FSH only