Life Processes in Living Organisms Part - 2
Maharashtra Board · Class 10 · Science
Flashcards for Life Processes in Living Organisms Part - 2 — Maharashtra Board Class 10 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is reproduction?
Answer
Reproduction is the formation of a new organism of the same species by an already existing organism. It does not help the organism stay alive, but it maintains continuity of the species.
Why is reproduction important if it does not keep the parent alive?
Answer
It keeps the species going from one generation to the next. Without reproduction, the species would end even though the individual organism may survive for some time.
What is asexual reproduction?
Answer
Asexual reproduction is the formation of a new organism without the involvement of gametes. It is uniparental and occurs by mitotic cell division.
Why does asexual reproduction produce offspring that are exactly similar to the parent?
Answer
No gamete fusion takes place, so there is no genetic recombination. The offspring gets the same genetic material as the parent, so it is genetically identical.
What is the main advantage and drawback of asexual reproduction?
Answer
Its main advantage is speed. Its main drawback is the absence of genetic recombination, so there is little variation in offspring.
How does binary fission occur in Amoeba?
Answer
Amoeba divides in any plane because it has no fixed shape. This is called simple binary fission. One parent cell divides into two similar daughter cells.
How do Paramecium and Euglena divide by binary fission?
Answer
Paramecium divides by transverse binary fission, while Euglena divides by longitudinal binary fission. These names depend on the axis of division.
What happens in multiple fission of Amoeba?
Answer
Under adverse conditions, Amoeba forms a cyst. Inside the cyst, many nuclei are formed by repeated nuclear division. Then the cytoplasm divides and many amoebulae are produced. When conditions become …
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