The human fetus develops limbs and digits:

1. After one month of pregnancy

2. By the end of second month of pregnancy

3. During the fifth month of pregnancy

4. By the end of second trimester of pregnancy

In the male human being, sperms contain autosomes and

1. Only one Y-chromosome

2. Only one X-chromosome

3. Both X and Y-chromosome

4. Either X or Y-chromosome

Number of spermatozoa single primary spermatocyte ultimately produces in spermatogenesis is 

(1) Eight

(2) Four

(3) Two

(4) One

In the vertebrates testes, for nourishment during spermiogenesis, the spermatids get attached to

(1) Interstitial cells

(2) Sperm-mother cells

(3) Spermatocytes

(4) Sertoli cells

The menstrual cycle begins with the casting off of

(1) Placenta

(2) Blood

(3) Endometrial lining along with blood vessels

(4) All the three

Graafian follicle of ovary secretes which hormone

1. Cortisone

2. Relaxin

3. Progesterone

4. None of these

Which of the following hormones acts on the Sertoli cells to stimulate secretion of some factors which help in the process of spermiogenesis?

1. FSH

2. LH

3. Testosterone

4. GnRH

The developing oocyte divides and releases the first polar body in :

1. Primary follicle

2. Secondary follicle

3. Tertiary follicle

4. Graffian follicle

During parturition, the fetal ejection reflex triggers the release of:

1. An increasing amount of estrogen and a decreasing amount of progesterone from the placenta

2. A decreasing amount of estrogen and an increasing amount of progesterone from the placenta

3. Oxytocin in from the maternal pituitary

4. GnRH from the fetal hypothalamus

What structure gets implanted on the wall on the uterus during embryonic development?

1.

2.

3.

4.