INTEXT QUESTIONS 24.1
1. Define reproduction.
Answer: Reproduction is the biological process in which living organisms produce new individuals of their own species, ensuring the continuation of life.
2. State one point of difference between asexual and sexual reproduction.
Answer: Asexual reproduction involves only one parent and no fusion of gametes, while sexual reproduction involves two parents and fusion of male and female gametes.
3. Why is binary fission considered to be an asexual form of reproduction .
Answer: Binary fission is considered asexual reproduction because it involves only one parent organism and does not involve the formation or fusion of gametes. In this process, the parent cell simply divides into two identical daughter cells, which are genetically the same as the parent.
4. Define vegetative propagation with the help of an example.
Answer: Vegetative propagation is a type of asexual reproduction in which new plants develop from the vegetative parts of a plant such as roots, stems, or leaves.
For example, in Bryophyllum, new plants grow from the buds present on the edges of its leaves.
5. Define the following (i) callus (ii) clone
Answer: (i) Callus is an undifferentiated mass of cells that is formed when plant cells are grown in a culture medium.
(ii) Clone is a genetically identical copy of the parent organism, formed through asexual reproduction. For example, Dolly the sheep was a cloned animal.
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