The most basic essence of life is ____

a. reproduction of a keystone species
b. reproduction of genetic information
c. reproduction of cells
d. photosynthesis
e. redox reactions


ANSWER: b

Biology & Microbiology

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The pyrimidine bases are _______

A. cytosine, thymine, and uracil B. adenine and guanine C. adenine and thymine D. cytosine and guanine

Biology & Microbiology

Foreign particles circulating in the blood are filtered out by which of the following?

a. lymph b. lymph nodes c. mucosa-associated lymphoid tissue (MALT) d. spleen

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What was the dominant life form of the Mesozoic era?

a. fish b. reptiles c. mammals d. amphibians e. vascular plants

Biology & Microbiology

Amino acids are monomers used to build:

A) polysaccharides. B) nucleic acids. C) triglycerides. D) proteins.

Biology & Microbiology