EXERCISES
1. Why is reproduction essential for organisms?
2. Which is a better mode of reproduction: sexual or asexual? Why?
3. Why is the offspring formed by asexual reproduction referred to as clone?
4. Offspring formed due to sexual reproduction have better chances of
survival. Why? Is this statement always true?
5. How does the progeny formed from asexual reproduction differ from
those formed by sexual reproduction?
6. Distinguish between asexual and sexual reproduction. Why is vegetative
reproduction also considered as a type of asexual reproduction?
Answers
Explanation:
1) Reproduction is the process by which new individuals are produced by the parents. The process of reproduction ensures that a plant or animal species does not disappear from Earth. This process is very important in maintaining stability in the ecosystem and for the continuation of life on earth.
2) Answer Sexual reproduction is a better mode of reproduction. It allows the formation of new variants by the combination of the DNA from two different individuals, typically one of each sex. ... On the contrary, asexual reproduction allows very little or no variation at all.
3) In the process of asexual reproduction, only one parent is involved and there is no fusion of the male and the female gamete. As a result, the offsprings so produced are morphologically and genetically similar to their parents and are thus, called clones.
4) Yeah, it is correct that the rate of survival of offspring born from sexual reproduction is higher than that of asexual reproduction. This is when two parents' gametes, male and female, come together and merge during sexual reproduction. Thus, the foetus gets all parents' genetic material.
5)In asexual reproduction, offsprings are produced by a single parent without the involvement of gamete formation and fusion. ... In sexual reproduction, fusion of gametes occur and fertilization and meiosis are essential events. Here, offsprings differ from parents due to appearance of variations.
6) Vegetative reproduction is considered as a type of asexual reproduction because here also characters of parent plants are preserved. ... Moreover the formation of new individuals does not involve two parents, process involved is asexual.
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