A motor neuron connects to muscle cells through
A) electrical synapses.
B) chemical synapses that use the neurotransmitter acetylcholine.
C) myofibrils.
D) sarcomeres.
B
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Which of the following sets of conditions would produce a cumulus cloud with the lowest base?
a. air temperature 90o F, dew point temperature 50o F b. air temperature 90o F, dew point temperature 40o F c. air temperature 90o F, dew point temperature 60o F d. air temperature 90o F, dew point temperature 20o F
What factors might limit the lifetime of a technological civilization? Could any of today's global environmental problems (global warming, ozone depletion, and loss of biodiversity) destroy our technological society?
What will be an ideal response?
Volcanic _______________ is composed of bits of pumice less than 2 mm across
Fill in the blank with correct word.
Of the following choices, the surface with the HIGHEST albedo is:
A) water (Sun near zenith). B) fresh snow. C) grass. D) sand.