Relatively small organic molecules with a central carbon atom which is bonded to a carboxyl group, an amino group, a carbon containing group, and a hydrogen atom are called:
A. peptides.
B. nucleotides.
C. fatty acids.
D. enzymes.
E. amino acids.
Answer: E
Biology & Microbiology
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Action potentials in the heart move from one contractile cell to the next via _____
A) chemical synapses using acetylcholine B) chemical synapses using norepinephrine C) electrical synapses using gap junctions D) non-myelinated motor neurons
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To maximize its energy gain, the bird should remain on one tree.
a. true b. false
Biology & Microbiology
In a species such as elephant seals, in which males are significantly larger than females, the most likely mating system is:
a. polyandry. b. promiscuity. c. monogamy. d. It is impossible to predict the mating system with only this information. e. polygyny.
Biology & Microbiology