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FAQs on Infographic: Reproduction in Animals - Science Class 8

1. What are the main types of reproduction in animals?
Ans. The two main types of reproduction in animals are sexual reproduction and asexual reproduction. Sexual reproduction involves the combination of genetic material from two parents, resulting in offspring with genetic variation. Asexual reproduction, on the other hand, involves a single organism reproducing without the involvement of gametes, creating clones of itself.
2. How does sexual reproduction occur in animals?
Ans. Sexual reproduction in animals typically involves the fusion of male and female gametes, which can occur through various methods such as internal fertilization, where the sperm fertilizes the egg inside the female's body, or external fertilization, where the sperm and egg meet outside the bodies of the parents, commonly seen in aquatic animals.
3. What are the advantages of asexual reproduction in animals?
Ans. Asexual reproduction offers several advantages, including the ability to reproduce quickly and efficiently without the need for a mate, which is beneficial in stable environments. It allows for rapid population growth and is advantageous in environments where individuals may be scarce or conditions are not conducive to finding mates.
4. Can you give examples of animals that reproduce asexually?
Ans. Yes, several animals reproduce asexually. Common examples include hydras, which can reproduce through budding, and certain species of starfish, which can regenerate lost limbs and form new individuals. Other examples include some species of flatworms and sponges that can reproduce through fragmentation.
5. What role does fertilization play in animal reproduction?
Ans. Fertilization is a crucial process in sexual reproduction as it marks the union of male and female gametes, leading to the formation of a zygote. This zygote undergoes development to form a new organism, combining genetic material from both parents, which increases genetic diversity and adaptation, essential for the survival of species.
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