A single species of squirrel evolved over time into two species, each on opposite sides of the Grand Canyon. This change was most likely due to Select one:

Low variation in the initial population

Differences in reproductive rates

More food was found on one side

The isolation of the two groups

No its just makes the straight guy curious

The answer is reflection.

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.

Gay-lussac's law i think.