An organism that can live in only one particular environment or that can survive on only one type of food would be called a specialist.
<h2><u>Answer:-</u></h2>

✯ Synapse is the gap between neurons that ensures that information travels in one direction only.
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
Therefore, the 2nd statement [B] is correct.
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
<h3>
<u>Addit</u><u>ional</u><u> </u><u>Inf</u><u>ormation</u><u>:</u><u>-</u></h3>
A Synapse is a small gap at the end of a neuron that allows a signal to pass from one neuron to the next. Synapses are found where nerve cells connect with other nerve cells. Synapses are the key to the brain's function.
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
The term synapse was first introduced in 1897 by Michael Foster in his "Textbook of Physiology" and derived from the Greek synapsis, meaning "conjunction."
Answer: E. Polygenic
Explanation: The color of eyes and hair is due to quantity and accumulation of pigments such melanin. Melanin is synthesize by multiple enzymatic steps and every enzyme is codified by a different gene. That means polygenic inheritance, that several genes are implicated in determined the this trait and its difficult to trace since every gene has a sequence that can vary between families or human groups.