EVOLUTION
SOURCES OF VARIATION IN A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The organisms are smaller
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Increase in physical variation
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genetic similarity and less likely to survive environmental change
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takes a relatively short amount of time
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Detailed explanation-1: -In an unstable or unpredictable environment asexually-reproducing species may be at a disadvantage because all the offspring are genetically identical and may not have the genetic variation to survive in new or different conditions.
Detailed explanation-2: -The disadvantages of asexual reproduction include: it does not lead to variation in a population. the species may only be suited to one habitat. disease may affect all the individuals in a population.
Detailed explanation-3: -Disadvantages of Asexual Reproduction All the negative mutations persist for generations. Since only one organism is involved, the diversity among the organisms is limited. They are unable to adapt to the changing environment. A single change in the environment would eliminate the entire species.
Detailed explanation-4: -Hence, the correct answer is option B, ‘Lack of genetic variation’. Note:Asexual reproduction is less costly in terms of energy and time expenditure. Though asexual reproduction can occur in various types of environment, any type of change can lead to their destruction.