Question

Enumerate the differences between asexual and sexual reproduction.
Describe the types of asexual reproduction exhibited by unicellular
organisms.


NCERT Class XII
Biology - Main Course Book

Chapter 1. Reproduction

Answer 1

ASEXUAL REPRODUCTION-----A type of reproduction in which only a single parent is required for giving rise to a new individual...... Is known as Asexual Reproduction... For example... Binary fission in Amoeba and budding in Yeast..... SEXUAL REPRODUCTION------A type of reproduction in which two parents are involved to give birth to a new individual..... For example ...Mammals

Answer 2

Answer:

Asexual Reproductions

1. When the offspring are born without the contribution of another organism of the same species it is known as asexual reproduction.
2. Organisms reproduce by binary fission, fragmentation, budding, spore formation.
3. Uniparental
4. Divide by mitosis.
5. Somatic cells are involved.
6. It occurs in unicellular organisms and lower invertebrates with simple structures
7. No fusion of gametes takes place.
8. The cells multiply rapidly in very less time.
9. No fertilization takes place.

Sexual Reproduction

1. When the offspring are born with the help of another organism of the same species but opposite sex, it is known as sexual reproduction.

Organisms reproduce by syngamy and conjugations

3.Bi-parental

4.Divide by mitosis and meiosis

5.

Germ cells are involved.

6.It occurs in higher plants and animals.

7.The fusion of gametes takes place.

8.This reproduction takes a longer time

9.Fertilization takes place in the process.

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