Hello There!
The question you asked is how is the male reproductive system different from other body systems?
The answer is "It isn’t necessary to vital signs."
unlike other body systems, the male reproductive system is not essential for the life of a living organism.
Mechanical digestion takes place in the mouth
When the fish is put into fresh water, suddenly the concentration around them is very low and the water potential is extremely high. Water will now move from the relatively high water potential in the water to the relatively low water potential in the cells, the cells start to burst and the fish dies.
DNA methylation is a process by which methyl groups are added to the DNA molecule. Methylation can change the activity of a DNA segment without changing the sequence. When located in a gene promoter, DNA methylation typically acts to repress gene transcription.