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Biology Chapter 5 : Topic 4
Significance of Cell Division
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The main significance of mitosis in multicellular organisms is:
Reasoning: Mitosis helps organisms grow and replace damaged or dead cells.
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Which process is responsible for replacing old skin cells?
Reasoning: Skin cells divide by mitosis for continuous replacement.
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The significance of meiosis is mainly related to:
Reasoning: Meiosis produces sperm and egg cells.
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Mitosis ensures that daughter cells have:
Reasoning: Mitosis maintains genetic stability.
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Which process is essential for genetic stability in body cells?
Reasoning: Mitosis ensures identical genetic information is preserved.
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Which process introduces genetic variation in offspring?
Reasoning: Meiosis produces genetically different gametes.
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Why is mitosis important for wound healing?
Reasoning: New cells formed by mitosis repair injured tissues.
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The role of meiosis in evolution is mainly due to:
Reasoning: Genetic variation provides raw material for evolution.
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Which process ensures continuity of chromosome number in body cells?
Reasoning: Mitosis maintains constant chromosome number in somatic cells.
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Which process ensures chromosome number remains constant across generations?
Reasoning: Meiosis halves chromosome number; fertilization restores it.
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If mitosis did not occur, what would be affected most?
Reasoning: Mitosis is essential for growth and repair.
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If meiosis did not occur, what would be directly affected?
Reasoning: Meiosis is required for sperm and egg production.
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Which statement best describes the importance of mitosis?
Reasoning: Mitosis is essential for body maintenance and growth.
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Which process is directly responsible for increasing genetic diversity in a population?
Reasoning: Meiosis introduces variation through crossing over and independent assortment. -----------------------------------------------------------------------
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