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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Act as source of evolution.
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Can adapt to environment change.
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Increase the ability of a species to survive in changing environment.
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Can make an organism live longer.
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Detailed explanation-1: -It helps a species to survive, it also helps us to determine who is who, it helps organisms to adapt to their environment as well as to changes which do occur in the environment, however it also helps a species to emerge strong if favoured by natural selection.
Detailed explanation-2: -All variations in a species do not have equal chances of survival. Some of the variations may be so drastic that the new DNA copy cannot work with the cellular apparatus it inherits. Such, a newborn cell dies soon. Hence, Statement 2 is not correct.
Detailed explanation-3: -Variations occur only in sexual mode of reproduction.
Detailed explanation-4: -variation, in biology, any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).