Natural selection is limited in its effectiveness in preserving new favorable mutations in an environment that


Answer: Has cyclical variations in its environmental conditions.

Biology & Microbiology

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What makes a prion unique as an infectious particle?

What will be an ideal response?

Biology & Microbiology

All of the products of the light-dependent

reactions of photosynthesis listed below are used in the light-independent reactions EXCEPT for a. O2. b. electrons. c. NADPH. d. ATP. e. hydrogen protons contributed by NADPH.

Biology & Microbiology

During the first major divergence of life the

atmosphere was a. high oxygen, high carbon dioxide. b. high hydrogen, low oxygen. c. changing from anaerobic to aerobic. d. firmly in the age of aerobes. e. all of these.

Biology & Microbiology

Which antibody class acts as a B cell receptor?

a. IgG b. IgA c. IgE d. IgD e. IgM pentamer

Biology & Microbiology