The main function of mammalian corpus luteum is to produce

1. estrogen only

2. progesterone

3. human chorionic gonadotropin

4. relaxin only

Select the correct option describing gonadotropin activity in a normal pregnant female

1. High level of FSH and LH stimulates the thickening of endometrium

2. High level of FSH and LH facilitate implantation of the embryo

3. High level of HCG stimulates the synthesis of estrogen and progesterone

4. High level of HCG stimulates the thickening of endometrium

Perisperm differs from endosperm in

1. being a haploid tissue

2. having no reserve food

3. being a diploid tissue

4. its formation by fusion of secondary nucleus with several sperms

Which one of the following statements is false in respect of viability of mammalian

sperm?

1. Sperm is viable for only up to 24 h

2. Survival of sperm depends on the pH of the medium and is more active in alkaline

medium

3. Viability of sperm is determined by its motility

4. Sperms must be concentrated in a thick suspension

The Leydig cells as found in the human body are the secretory source of

1. progesterone

2. intestinal mucus

3. glucagon

4. androgens

Which one of the following helps in absorption of phosphorus from soil by plants?

1. Rhizobium

2. Anabaena

3. Frankia

4. Glomus

The figure given below depicts a diagrammatic sectional view of the female

reproductive system of humans. Which one set of three parts out of A-F have been

correctly identified?

1. C-lnfundibulum, D-Fimbriae, E-Cervix

2. D-Oviducal funnel, E-Uterus, F-Cervix

3. A-Perimetrium, B-Myometxium, C-Fallopian tube

4. B-Endometrium, C-Infundibulum, D-Fimbriae

Sertoli cells are found in

1. ovaries and secrete progesterone

2. adrenal cortex and secrete adrenalin

3. seminiferous tubules and provide nutrition to germ cells

4. pancreas and secrete cholecystokinin

Vasa efferentia are the ductules leading from

1. testicular lobules to rete testis

2. rete testis to vas deferens

3. vas deferens to epididymis

4. epididymis to urethra

The second maturation division of the mammalian ovum occurs

1. shortly after ovulation before the ovum makes entry imto the Fallopian rube

2. until after the ovum has been penetrated by a sperm

3. until the nucleus of the sperm has fused with that of the ovum

4. in the Graafian follicle following the first maturation division