Assertion : Mammary glands are apocrine glands.

Reason : The distal part containing secretory granules break down and leaves as a secretion.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

How many sperms are formed from a secondary
spermatocyte

• 4

• 8

• 2

• 1

Grey crescent is the area

• at the point of entry of sperm into ovum

• just opposite to the site of entry of sperm into ovum

• at the animal pole

• at the vegetal pole.

Assertion : Mammalian ova produces hyaluronidase.

Reason : The eggs of mammal are microlecithal and telolecithal.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Which of the following is true regarding sperm?

• Fertilizin : for penetrating egg membrane

• Hyalurodinase : for penetrating egg membrane

• Acrosin : dissolves corona radiata

• Capacitation : takes place in penis

Assertion: In mammals the female secondary sexual characters are developed by gonadotropins.

Reason: Gonadotropins are secreted by graafian follicle.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

117.

A cross section at the midpoint of the middle piece of a human sperm will show

• centriole, mitochondria and 9 + 2 arrangement of microtubules

• centriole and mitochondria

• mitochondria and 9 + 2 arrangement of microtubules

• 9 + 2 arrangement of microtubules only

Which one of the following events is correctly matched with the time period in a normal menstrual cycle?

• Release of egg: 5^th day

• Endometrium regenerates: 5 - 10 days

• Endometrium secretes nutrients for implantation : 11 - 18 days

• Rise in progesterone level : 1 - 15 days

Both corpus luteum and macula lutea are

• found in human ovaries

• a source of hormones

• characterized by a yellow colour

• contributory in maintaining pregnancy

The phase of menstrual cycle in humans that last for 7 - 8 days, is: 

• follicular phase

• ovulatory phase

• luteal phase

• menstruation