Acrosome reaction in sperm is triggered by

(1) capacitation

(2) release of lysin

(3) influx of Ca++

(4) release of fertilizin

How many sperms are formed from a secondary spermatocyte?

(1) 4

(2) 8

(3) 2

(4) 1

Grey crescent is the area

(1) at the point of entry of sperm into ovum

(2) just opposite to the site of entry of sperm into ovum

(3) at the animal pole

(4) at the vegetal pole

Which of the following statements is correct?

(1) Monkey, apes and humans exhibit estrous cycle.

(2) Urine is pale yellow and slightly alkaline.

(3) Lots of enzymes are present in bile juice.

(4) Ovulation in humans is spontaneous.

The 'cells of Rauber' are

(1) secretory cells of endometrium in uterus

(2) inner cell mass of blastocoel

(3) outer cells of trophoblast in contact with uterine wall

(4) cells of trophoblast, in contact with inner cell mass of blastocyst.

Choose the correct statement.

Starting from the maximum, arrange the following male reproductive accessory organs in the correct order, based on the amount of secretion poured into urethra

(i) Prostrate gland

(ii) Seminal vesicle

(iii) Bulbourethral gland

(1) (i) > (ii) > (iii)

(2) (iii) > (ii) > (i) 

(3) (ii) > (iii) > (i)

(4) (ii) > (i) > (iii)

During menstrual cycle, levels of LH and estrogen are highest around

(1) 14^th day

(2) 21^st day

(3) 7^th day

(4) 28^th day

Hormones for the menstrual cycle are produced by

(1) ovaries only

(2) uterus only

(3) ovaries only

(4) ovaries and anterior pitutory

Select the correct explanation for the labels A, B, C and D.

(1)    A represents the fertilized zygote.

(2)    B represents the stage of morula formation.

(3)    C represents the blastocyst.

(4)    D represents the blastocyst implantation.