In neurons, an action potential begins when a(n) ________ reaches a(n) ________
a. ion pump / membrane
b. electrical charge / cell body
c. membrane potential / threshold level
d. ion concentration / equilibrium
c
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Temperature at which matter changes from liquid to solid
What will be an ideal response?
You will always wash your hands and desk before and after labs
a. true b. false
Which type of reproductive isolation
mechanism is most closely related to allopatric speciation?
a. temporal b. mechanical c. behavioral d. ecological e. genetic
A black bear population being fragmented into
separate smaller populations by a newly constructed road and the smaller populations prevented from interacting is an example of
a. behavioral isolation. b. temporal isolation. c. ecological isolation. d. mechanical isolation. e. genetic isolation