Commensalism
<span>In definition, commensalism is a ecological relationship between two organisms where one benefits and the other doesn't without harming the host for that matter. Unlike commensalism, mutualism exists when those two organisms at the same time benefit from the behavior of the other. </span>
N=64 I think i am not sure !
C) an organ
Its made up of tissues and is part of the nervous system
Muscle cells work hard and therfore require a lot of energy thus they contain more mitochondria to produce a high level of ATP.
A. Species adapt over time based on the environmental selection pressures. Individuals cannot go through evolution, since evolution consists of natural selection, which chooses for individuals with certain advantageous characteristics to survive, and for the individuals with disadvantageous characteristics to die. The favourable allele coding for the advantageous characteristic in individuals will then be passed on to their offspring, and natural selection continues.
Hope this helps! :)