It's both! Scientists really can't agree on it.
A molecule is the smallest particle of a substance that exists independently. Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms. ... The oxygen molecules are bonded or stuck together.
Phosphorus: a vital source of animal nutrition. Phosphorus is one of the most important minerals in animal nutrition. It is the second most abundant element in an animal's body after calcium, with 80% of phosphorus found in the bones and teeth, with the remainder located in the body fluids and soft tissue.
Answer:
Because through fertilization, we have the union of half of the paternal and maternal patrimony. In asexual reproduction, on the other hand, the child organisms will be the same as the organism that generated them
