Free Human Reproduction (Daily Quiz: 3) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Free Human Reproduction (Daily Quiz: 3) Time:

Question-1

An adult testes is oval in shape. Its width is about ____ and length is about ____ respectively.

(a)

(b)

(c)

(d)


Question-2

Which one of the following statement is false in respect of viability of mammalian sperm?

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

The incorrect statement can be corrected as Viability of a sperm means the capability of a sperm, fertilising an egg. Sperms are viable for 24 hrs-48 hrs, whereas the ovum is viable for only 24 hrs. Rest of the statements are correct.


Question-3

Assertion (A) Production of FSH and LH increases in the ovulation phase.
Reason (R) Due to decrease in the level of LH ovulation (releasing of ova) takes place.

(a)

(b)

(c)

(d)

Explanation:

Answer: (c)

Assertion is true, but Reason is false. It can be corrected as In menstrual cycle, rapid secretion of LH leads to its maximum level during mid-cycle. It is called LH surge. It induces rupture of Graafian follicle, thereby releasing ovum (ovulation).


Question-4

The first movements of the fetus and appearance of hair on its head are usually observed during which month of pregnancy?

(a)

(b)

(c)

(d)

Explanation:

Answer: (a)

In human beings, after one month of pregnancy, the embryo's heart is formed. By the end of the second month of pregnancy, the fetus develops limbs and digits. By the end of 12 weeks (first trimester), most of the major organ systems are formed. The first movements of the fetus and appearance of hair on the head are usually observed during the fifth month. By the end of 24 weeks (second trimester), the body is covered with fine hair, eyelids separate and eyelashes are formed. By the end of nine months of pregnancy, the fetus is fully developed and is ready for delivery.


Question-5

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from

(a)

(b)

(c)

(d)

Explanation:

Answer: (c)

Vasa efferentia are fine ciliated ductules that arise from the seminiferous tubules of testis (where sperms are formed) and open into epididymis which is a mass of long, narrow, closely coiled tubule lying along the inner side of testis. Epididymis stores the sperms. Thus, if vasa efferentia get blocked, sperms will not be transported from testes to epididymis.


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