Mutagen is an environmental agent that changes the DNA.
it simply means the cell's DNA is surrounded by a membrane. therefore the nucleus houses the cell's DNA and directs the synthesis of the proteins and ribosomes the cellular responsible for protein synthesis.
Cellular respiration happens in all eukaryotic cells and it occurs in the mitochondria, the powerhouse of the cell. cell resp breaks up glucose in order to create more ATP for the cell. the products that go IN are GLUCOSE and OXYGEN. the products that come OUT are CARBON DIOXIDE, WATER, and of course, ENERGY.
It is scientifically known as Hidrologic Cycle
