Which organelle breaks down organelles that are no longer useful?

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

How does human environment effect the biosphere

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen