A group of squirrels in a forest is an example of ?

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

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?

Explain the process that creates the heat of the sun?