What aspect of a population is critical in determining

a species in Ernst Mayer’s “biological species
concept”?
a. similar physical appearance
b. similar patterns of behavior
c. capability to interbreed
d. common habitat
e. similar nutritional requirements


Answer: c

Biology & Microbiology

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Endergonic reactions convert molecules with ____ free energy to molecules with ____ free energy, so they require a net energy input in order to proceed

a. higher; lower b. lower; higher c. zero; some d. some; zero e. chemical bond; no chemical bond

Biology & Microbiology

What compound provides the reducing power for Calvin cycle reactions?

A) ATP B) NADH C) NADP+ D) NADPH

Biology & Microbiology

The greatest population growth rate occurs in the 

A. exponential growth phase. B. lag phase. C. stable equilibrium phase. D. growth curve.

Biology & Microbiology

What is the most efficient and cost-effective way to control infectious diseases?

A) variolation B) active immunization by vaccination C) passive immunotherapy using immunoglobulins D) immune testing E) autoimmunization

Biology & Microbiology