Countershading is a common form of camouflage in ____ fishes
a. coral reef
b. eel grass bed
c. pelagic
d. deep sea
C
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The “conducting zone” of a neuron is found at the ____
a. axon b. dendrite terminal c. cell body d. axon hillock e. synapse
The only single-celled organisms are prokaryotes, such as archaea and bacteria.
a. False because some eukaryotes, including protista, are single-celled. b. False because some prokaryotes are multicellular. c. True because prokaryotes are the simplest cell form. d. False because all single-celled organisms are prokaryotes. e. True because all eukaryotes are multicellular.
The very first vertebrates were
A. fishes with jaws. B. fishes without jaws. C. cartilaginous fish. D. bony fish.
Valium, a prescription drug used to treat anxiety, works by
A) binding and activating acetylcholine receptors. B) preventing serotonin reuptake into neurons. C) increasing the release and availability of norepinephrine and dopamine at synapses. D) activating receptors for GABA.