Answer:
C
Explanation:
Firstly, an action potential travels down to an axon and reaches the presynaptic membrane. After that synaptic vesicles move to and bind with the presynaptic membrane. Than, neurotransmitters are released into the synaptic cleft. In the next step, receptors on the postsynaptic membrane bind the neurotransmitters. In the last step, binding neurotransmitters cause excitation or inhibition.
Ecological succession occurs due to the changes in physical environment and population of species. In an ecosystem, a species requires a particular set of environmental conditions under which they grow and reproduce.
Answer:
D. more variety in population
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The era began with the break up of one super continent and a formation of another one...
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