An axon terminal communicates with a neighboring neuron through a junction called a

Synapse

Explanation:

A neuronal junction or synapse is a form of communication between cells that happens with the transmission of electric impulses between two neurons, this process occurs when one neuron (presynaptic neuron) releases a neurotransmitter, stored in the synaptic vesicles, into the synaptic cleft reaching a second neuron (post-synaptic neuron) with specific receptors. In the image I added you can see how this synapse occurs.

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in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.