NCERT Class 12 Biology: Chapter –1 Reproduction in Organisms Part 1

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Multiple Choice Questions

Question 1:

A few statements describing certain features of reproduction are given below:

i. Gametic fusion takes place

ii. Transfer of genetic material takes place

iii. Reduction division takes place

iv. Progeny have some resemblance with parents

Select the options that are true for both asexual and sexual

reproduction from the options given below:

(a) i and ii

(b ) ii and iii

(c) ii and iv

(d) i and iii

Answer: (c)

Question 2:

The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because:

a. Offspring do not possess exact copies of parental DNA

b. DNA of only one parent is copied and passed on to the offspring

c. Offspring are formed at different times

d. DNA of parent and offspring are completely different.

Answer: (a)

Question 3:

Amoeba and Yeast reproduce asexually by fission and budding respectively, because they are:

a. Microscopic organisms

b. Heterotrophic organisms

c. Unicellular organisms

d. Uninucleate organisms.

Answer: (c)

Question 4:

A few statements with regard to sexual reproduction are given below:

i. Sexual reproduction does not always require two individuals

ii. Sexual reproduction generally involves gametic fusion

iii. Meiosis never occurs during sexual reproduction

iv. External fertilisation is a rule during sexual reproduction

Choose the correct statements from the options below:

(a) i and iv

(b) i and ii

(c) ii and iii

(d) i and iv

Answer: (b)

Question 5:

A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has

a. haploid vegetative cells and diploid gametangia

b. diploid vegetative cells and diploid gametangia

c. diploid vegetative cells and haploid gametangia

d. haploid vegetative cells and haploid gametangia.

Answer: (d)

Question 6:

The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively,

a. 12, 24, 12

b. 24, 12, 12

c. 12, 24, 24

d. 24, 12, 24.

Answer: (c)

Question 13:

Choose the correct statement from amongst the following:

a. Dioecious (hermaphrodite) organisms are seen only in animals

b. Dioecious organisms are seen only in plants

c. Dioecious organisms are seen in both plants and animals

d. Dioecious organisms are seen only in vertebrates

Answer: (c)

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