NCERT Class 12 Biology: Chapter – 3 Human Reproduction Part 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 10:

Match between the following representing parts of the sperm and their functions and choose the correct option.

Chapter-3- Question - 10 - Table of Choose the Correct Answer
Column AColumn B
A.Headi.Enzymes
B.Middle pieceii.Sperm motility
C.Acrosomeiii.Energy
D.Tailiv.Genetic material

Options:

a. A-ii, B-iv, C-i, D-iii

b. A-iv, B-iii, C-i, D-ii

c. A-iv, B-i, C-ii, D-iii

d. A-ii, B-i, C-iii, D-iv

Answer: (b)

Question 11:

Which among the following has 23 chromosomes?

a. Spermatogonia

b. Zygote

c. Secondary oocyte

d. Orgonial

Answer: (c)

Question 12:

Match the following and choose the correct options:

Chapter-3- Question - 12 - Table of Choose the Correct Option
A.Trophoblasti.Embedding of blastocyst in the endometrium
B.Cleavageii.Group of cells that would differentiate as embryo
C.Inner cell massiii.Outer layer of blastocyst attached to the endometrium
D.Implantationiv.Mitotic division of zygote

Options:

a. A-ii, B-i, C-iii, D-iv

b. A-iii, B-iv, C-ii, D-i

c. A-iii, B-i, C-ii, D-iv

d. A-ii, B-iv, C-iii, D-i

Answer: (b)

Question 13:

Which of the following hormones is not secreted by human placenta?

a. hCG

b. Estrogens

c. Progesterone

d. LH

Answer: (d)

Question 14:

The vas deferens receives duct from the seminal vesicle and opens into urethra as:

a. Epididymis

b. Ejaculatory duct

c. Efferent ductule

d. Ureter

Answer: (b)

Question 15:

Urethral meatus refers to the:

a. Urinogenital duct

b. Opening of vas deferens into urethra

c. External opening of the urinogenital duct

d. Muscles surrounding the urinogenial duct

Answer: (c)

Question 16:

Morula is a developmental stage:

a. Between the zygote and blastocyst

b. Between the blastocyst and gastrula

c. After the implantation

d. Between implantation and parturition

Answer: (a)

Question 17:

The membranous cover of the ovum at ovulation is:

a. Corona radiata

b. Zona radiata

c. Zona pellucida

d. Chorion

Answer: (a)