Hair is a character shared by all mammals, but not found in their ancestral lineage. Hair is therefore considered to be a(n)

A. shared derived character (trait).
B. analogous structure.
C. clade.
D. shared ancestral character (trait).


Answer: A

Biology & Microbiology

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The light reactions of photosynthesis, which form ATP and NADPH, take place in the

A. thylakoid membrane. B. cytoplasm. C. stroma. D. nucleus.

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Lipids are recognized as a group because they ________

a. are all formed from the same basic monomer, cholesterol b. contain a unique bond, the peptide bond, between adjacent monomers c. do not dissolve in water d. are the only biological molecules that are susceptible to hydrolysis

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Which portion of the lymphatic system is the site where T lymphocytes develop?

a. tonsils b. all lymph nodes c. liver d. thymus gland e. thoracic duct

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Natality is greater than mortality during the ____ phase. 

A. stable equilibrium B. lag C. exponential growth D. death

Biology & Microbiology