Class 10 Science — Chapter 7: How do Organisms Reproduce?

What you'll learn

• ▸The Role of DNA Copying in Reproduction
• ▸Importance of Variation
• ▸Asexual Reproduction: Fission
• ▸Asexual Reproduction: Fragmentation
• ▸Regeneration
• ▸Asexual Reproduction: Budding
• ▸Asexual Reproduction in Plants: Vegetative Propagation

Chapter Summary

--- PAGE 1 --- CHAPTER 7 How do Organisms Reproduce? 1064CH08 Before we discuss the mechanisms by which organisms reproduce, let us ask a more basic question – why do organisms reproduce? After all, reproduction is not necessary to maintain the life of an individual organism, unlike the essential life processes such as nutrition, respiration, or excretion. On the other hand, if an individual organism is going to create more individuals, a lot of its energy will be spent in the process. So why should an individual organism waste energy on a process it does not need to stay alive? It would be interesting to discuss the possible answers in the classroom! Whatever the answer to this question, it is obvious that we notice organisms because they reproduce. If there were to be only one, non- reproducing member of a particular kind, it is doubtful that we would have noticed its existence. It is the large numbers of organisms belonging to a single species that bring them to our notice. How d…

Practice Questions from this Chapter

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1. Explain cell division simply. Get Solution →
2. Compare asexual, sexual reproduction. Get Solution →
3. Show DNA copying visuals. Get Solution →
4. What is the information source for making proteins in a cell, as mentioned in the text? Get Solution →
5. According to the text, what is the most basic event in reproduction? Get Solution →
6. Which organism reproduces by a process called fragmentation? Get Solution →
7. The malarial parasite, Plasmodium, divides into many daughter cells simultaneously through which process? Get Solution →
8. In Hydra, a bud develops as an outgrowth due to repeated cell division at one specific site. What is this process called? Get Solution →

Did you know?

• 💡 Humans share about 50% of their DNA with a banana.
• 💡 Male seahorses carry and give birth to their babies.
• 💡 Some bacteria can swap DNA with each other, sharing new abilities.
• 💡 A single flatworm cut into many pieces grows into new worms.
• 💡 Your entire DNA from one cell would stretch almost two meters.

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