Genetic variation is an advantage of sexual reproduction. It increases survival and the ability to adapt in a species. Species with genetic variation can respond better to environment changes, since the genetic variability allows some to be immune to disease or adapt better to a change, and live to reproduce.
Slow to repopulate is a disadvantage because the species cannot recover quickly after a large disaster. It also means they cannot adapt as quickly to an environmental change.</span>
Nervous system is made up of organized group of cells (neurons)
that specialized for the conduction of electrochemical stimuli or signals from
sensory receptor to other sites. Thus, these signals are sent in form of
electrochemical waves that travel through thin fibers called axons. They are
made up of two parts namely: Central Nervous system and Peripheral Nervous
system.
The two nuclei are similar in size and appearance which is formed as a result of mitosis. Mitosis is a type of cell division in which a parent cell divides and produces two daughter cells that are identical to each other in size and shape. When the daughter cells formed the parent nuclei is divided and half part of nucleus is present in each daughter cell.