This is known as parasitism.
In biology, parasitism is a relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.
Answer:
mitochondrion becoz it is a membrane bounded organelle which is only present in eukaryotic cell
The atomic mass is the mass of an atomic particle, sub-atomic particle, or molecule.
