GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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giraffes would obtain neck lengths corresponding to leaf height if the appropriate alleles were newly introduced into the gene pool
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giraffes would obtain neck lengths corresponding to leaf height over multiple generations
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giraffes would obtain neck lengths corresponding to leaf height without selective pressures
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giraffes would obtain neck lengths corresponding to leaf height within a generation
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giraffes would obtain neck lengths corresponding to leaf height over multiple generations
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Detailed explanation-1: -So, the correct answer is ‘Individuals with the most favorable traits survive and reproduce’
Detailed explanation-2: -Answer and Explanation: The correct option is A. The long neck of a giraffe is the result of its ancestor continually reaching for higher branches. The long giraffes’ neck helps them to eat the higher tree branches.
Detailed explanation-3: -A Darwinian theory of evolution posits that it was through random variation that some giraffes had longer necks than others. Thanks to their long necks, they were able to reach leaves high up in the trees in their environment.
Detailed explanation-4: -Charles Darwin held up giraffes as a prime example of natural selection, his theory that’s often summarized as “survival of the fittest.” Giraffes with comparably longer necks could reach food high up in trees, which gave them an advantage over other animals and members of their own species with shorter necks.
Detailed explanation-5: -According to Lamarck, the giraffe got its long neck because its ancestors stretched theirs to eat leaves that were just out of reach. This stretching of the neck was passed on to their offspring, over generations, until it reached its current length.