OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Natural selection prepares the anatomy of organisms so that in the future the vestigial structure can be used
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The vestigial structure was not used by the modern organism, so it became non functional within the organism’s lifetime.
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A limited number of genes are expressed during the lifetime of an organism.
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The structure probably was functional in some ancestor of the modern organism
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Detailed explanation-1: -Vestigial structures are often homologous to structures that function normally in other species. Therefore, vestigial structures can be considered evidence for evolution, the process by which beneficial heritable traits arise in populations over an extended period of time.
Detailed explanation-2: -Structures that have lost their use through evolution are called vestigial structures. They provide evidence for evolution because they suggest that an organism changed from using the structure to not using the structure, or using it for a different purpose.
Detailed explanation-3: -How do vestigial structures indicate that present-day organisms are different from their ancient ancestors? The structures may once have functioned in the ancestors of the organism.
Detailed explanation-4: -Organisms possess vestigial structures because they have an ancestor that also possessed these structures. Those structures in descendent species adapted for different functions, or disappeared due to selective environmental pressures, which their ancestors did not experience.
Detailed explanation-5: -When these life forms changed they lost the use of some organs and eventually became vestigial. Hence the presence of vestigial organs supports the doctrine of organic evolution.