A population in ecology is defined as ________.
A. one organism and its surrounding environment
B. a group of organisms, all from the same species
C. a group of organisms, some from the same species, some from other species
D. a group of organisms, some from the same species, some from other species, and their surrounding environment
Answer: B
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A) potassium ions B) sodium ions C) calcium ions D) ATP E) all neurotransmitter molecules
The cofactors required for enzyme activity often are
a. allosteric inhibitors. b. allosteric activators. c. charged amino acids. d. large, complex organic molecules. e. competitive inhibitors.
During radioactive decay, the nucleus of an atom ________
a. disintegrates, releasing particles and energy b. captures an unclaimed proton c. transposes its neutrons and electrons d. converts from a relatively stable to an unstable form
HIV is a
double-stranded DNA virus. single-stranded RNA virus. single-stranded DNA virus. double-stranded RNA virus. prion.