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NCERT Solutions for Class 12 Biology Chapter 1
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NCERT Solutions for Class 12 Biology Chapter 1
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UR NIT II:
NIT II: SSTRUCTURAL
UEPRODUCTION TRUCTURAL O
IN ORGANISMS
ORGANISATION IN P
RGANISATION IN PLANTS AND A
LANTS AND ANIMAL
NIMALS 1
CHAPTER 1
REPRODUCTION IN ORGANISMS
MULTIPLE-CHOICE QUESTIONS
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.
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.
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.
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
, 2 BIOLOGY, EXEMPLAR PROBLEMS
Choose the correct statements from the options below:
(a) i and iv (b) i and ii (c) ii and iii (d) i and iv
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.
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.
7. Given below are a few statements related to external fertilization. Choose
the correct statements.
i. The male and female gametes are formed and released
simultaneously
ii. Only a few gametes are released into the medium
iii. Water is the medium in a majority of organisms exhibiting external
fertilization
iv. Offspring formed as a result of external fertilization have better
chance of survival than those formed inside an organism
(a) iii and iv (b) i and iii (c) ii and iv (d) i and iv
8. The statements given below describe certain features that are observed
in the pistil of flowers.
i. Pistil may have many carpels
ii. Each carpel may have more than one ovule
iii. Each carpel has only one ovule
iv. Pistil have only one carpel
Choose the statements that are true from the options below:
(a) i and ii (b) i and iii (c) ii and iv (d) iii and iv
9. Which of the following situations correctly describe the similarity between
an angiosperm egg and a human egg?
i. Eggs of both are formed only once in a lifetime
ii. Both the angiosperm egg and human egg are stationary
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