GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Increased genetic variability can be chosen by individuals in a species, giving them the ability to change their appearance to prevent extinction.
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The lack of genetic variability prevents a species from adapting to environmental changes, making the species more prone to extinction.
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The lack of genetic variability ensures that all organisms in a species have the exact same appearance, increasing their ability to find mates.
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Increased genetic variability limits the number of offspring that a species can produce, causing extinction
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Detailed explanation-1: -In regard to theory of evolution, which statement is correct about genetic variability? Increased genetic variability can be chosen by individuals in a species, giving them the ability to change their appearance to prevent extinction.
Detailed explanation-2: -It imparts the reproductive advantage to certain organisms which account for major part of the gene pool of the species. Thus, natural selection favors the individual with survival and/or reproductive advantage over others under existing environmental condition (E). Thus, the correct answer is option C.
Detailed explanation-3: -There are four principles at work in evolution-variation, inheritance, selection and time. These are considered the components of the evolutionary mechanism of natural selection.
Detailed explanation-4: -Final Answer: Darwin’s Theory does not include evolution through inheritance.
Detailed explanation-5: -Darwin proposed that species can change over time, that new species come from pre-existing species, and that all species share a common ancestor. In this model, each species has its own unique set of heritable (genetic) differences from the common ancestor, which have accumulated gradually over very long time periods.