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Multiple Choice
Which statement about vestigial traits is correct?
A
Vestigial traits are remnants of structures that had important functions in ancestors.
B
Vestigial traits are always harmful to the organism.
C
Vestigial traits are fully functional and necessary for survival.
D
Vestigial traits are newly evolved features that provide a selective advantage.
Verified step by step guidance
1
Understand the concept of vestigial traits: Vestigial traits are anatomical features or behaviors that were important in an organism's ancestors but have lost their original function or have reduced functionality in the current organism.
Analyze the first statement: 'Vestigial traits are remnants of structures that had important functions in ancestors.' This aligns with the definition of vestigial traits, as they are indeed remnants of ancestral features.
Evaluate the second statement: 'Vestigial traits are always harmful to the organism.' Consider that vestigial traits are not necessarily harmful; they may be neutral or have minimal impact on the organism's fitness.
Consider the third statement: 'Vestigial traits are fully functional and necessary for survival.' This contradicts the definition of vestigial traits, as they are not fully functional or necessary for survival.
Review the fourth statement: 'Vestigial traits are newly evolved features that provide a selective advantage.' This is incorrect because vestigial traits are not newly evolved; they are remnants of ancestral features that have lost their original function.