Which excitatory neurotransmitter is responsible for muscle contraction in vertebrates?
A. dopamine
B. norepinephrine
C. nitrous oxide
D. glutamate
E. acetylcholine
E
Biology & Microbiology
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When plants are produced by cloning, which process is most directly involved?
a. mitotic cell division b. binary fission c. meiotic cell division d. gamete production e. budding
Biology & Microbiology
The nutrient canal is indicated by
a. A. b. B. c. C. d. D. e. E.
Biology & Microbiology
Body defenses that respond to generalized tissue damage and many common pathogens are referred to as
A) phagocytic. B) antipathogenic responses. C) nonspecific mechanisms. D) lymphomas. E) specific mechanisms.
Biology & Microbiology
A cell that contains a nucleus is called a(n) (prokaryotic/archaeal/eukaryotic) cell
What will be an ideal response?
Biology & Microbiology