CBSE (Science) Class 12CBSE
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NCERT solutions Biology Class 12 chapter 1 Reproduction in Organisms


NCERT Biology Class 12

Biology Textbook for Class 12

Chapter 1 - Reproduction in Organisms

Page 17

Why is reproduction essential for organisms?

Q 1 | Page 17

Pages 17 - 18

Which is a better mode of reproduction sexual or asexual? Why?

Q 2 | Page 17

Why is the offspring formed by asexual reproduction referred to as clone?

Q 3 | Page 17

Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?

Q 4 | Page 17

How does the progeny formed from asexual reproduction differ from those formed by sexual reproduction?

Q 5 | Page 17

Distinguish between asexual and sexual reproduction

Q 6 | Page 17

Give two suitable examples of vegetative propagation

Q 7 | Page 18

Define Juvenile phase,

Q 8.1 | Page 18

Define Reproductive phase

Q 8.2 | Page 18

Define Senescent phase.

Q 8.3 | Page 18

Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?

Q 9 | Page 18

Explain why meiosis and gametogenesis are always interlinked?

Q 10 | Page 18

Identify each part in a flowering plant and write whether it is haploid (n) or diploid (2n).

Ovary ———————————

Anther ———————————

Egg ———————————

Pollen ———————————

Male gamete ———————————

Zygote ———————————

Q 11 | Page 18

Differentiate between a zoospore and a zygote.

Q 13 | Page 18

Differentiate between gametogenesis from embryogenesis.

Q 14 | Page 18

Describe the post-fertilization changes in a flower.

Q 15 | Page 18

Collect five bisexual flowers from your neighborhood and with the help of your teacher find out their common and scientific names.

Q 16 | Page 18

What is a bisexual flower?

Q 16.1 | Page 18

Examine a few flowers of any cucurbit plant and try to identify the staminate and pistillate flowers. Do you know any other plant that bears unisexual flowers?

Q 17 | Page 18

Why are offspring of oviparous animals at a greater risk as compared to offspring of viviparous animals?

Q 18 | Page 18

NCERT Biology Class 12

Biology Textbook for Class 12