Average human males are most likely to be attracted to women with a waist to hip ratio of 0.72. Women with this waist to hip ratio are also the most fertile. By being attracted to women with a waist to hip ratio, a male is increasing his chances of having children and thus improve his ________.
A. fitness
B. allele frequency
C. gene flow
D. longevity
Answer: A
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What is the role of actin in eukaryotic cells?
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A bear at a national park has discovered that if it can open the lid of the trash cans, it is likely to find tasty food inside. Soon it is trying to open the trash cans all over the park. What mechanism of learning has occurred?
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What are the protein-binding sequences that direct enhancers to interact with the intended promoter and that block communication between enhancers and other promoters?
What will be an ideal response?
When the air in a testing chamber is specially mixed so that its oxygen content is 10% and its overall air pressure is 400 mm Hg, then PO? is
A) 400 mm Hg. B) 82 mm Hg. C) 40 mm Hg. D) 21 mm Hg. E) 4 mm Hg.