Average human males are most likely to be attracted to women with a specific waist to hip ratio.  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 improves his 

A. gene flow.
B. longevity.
C. fitness.
D. allele frequency.


Answer: C

Biology & Microbiology

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After an action potential crosses the ________ node, it travels along conducting fibers in the heart's septum and up the ventricles, ejecting blood into the aorta and pulmonary arteries.

Fill in the blank(s) with the appropriate word(s).

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The major macromolecules of the ECM are

A. fat and proteins. B. nucleotides and proteins. C. fat and nucleotides. D. polysaccharides and proteins. E. polysaccharides and fat.

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What is the difference between chemical evolution and biological evolution?

What will be an ideal response?

Biology & Microbiology

Secondary messengers are molecules that bind with signal receptors on the plasma membrane of a target cell

1.True 2.False

Biology & Microbiology