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NCERT Class 12 Biology: Chapter β 3 Human Reproduction Part 2
Question 10:
Match between the following representing parts of the sperm and their functions and choose the correct option.
Column A | Column B | ||
---|---|---|---|
A. | Head | i. | Enzymes |
B. | Middle piece | ii. | Sperm motility |
C. | Acrosome | iii. | Energy |
D. | Tail | iv. | 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:
A. | Trophoblast | i. | Embedding of blastocyst in the endometrium |
B. | Cleavage | ii. | Group of cells that would differentiate as embryo |
C. | Inner cell mass | iii. | Outer layer of blastocyst attached to the endometrium |
D. | Implantation | iv. | 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)