Which of the following will lead to speciation?
select one of the options below as your
a.
variation in gene pool
b.
lack of mutations
c.
absence of natural selection

The correct answer is A. Variation in gene pool

Variations cause genetic drift and speciation while absence and lack of natural selection do quite the opposite, they keep us the same.

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.