The ultimate source of all the food we eat and the oxygen we breathe is

A) cellular respiration.
B) photosynthesis.
C) glycolysis.
D) anaerobic metabolism.


Answer: B

Biology & Microbiology

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The method of sequencing genomic fragments cloned straight from the genome is:

A. Cytogenetic mapping B. Shotgun sequencing C. Southern blotting D. Polymerase chain reaction

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Describe natural selection. Who first coined this phrase?

What will be an ideal response?

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What pigments are present in the samples derived from individuals that are homozygous recessive for shell color?

a. Red and grey b. Yellow and grey c. Red and yellow d. Red, yellow, and grey

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The term "reducing atmosphere" for the early Earth means that the atmosphere

A. contained little or no carbon dioxide. B. contained little or no free nitrogen. C. was much thinner around the surface of the Earth than now. D. contained only two or three kinds of gases. E. contained little or no free oxygen.

Biology & Microbiology