Which answer best indicates the dynamic balance of an ecosystem?

number of plants vs. number of animals
number and variety of organisms vs. changing environment
number of organisms vs. constant environment

Explain how organisms could be harmed by high levels of salt from roadways?

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

Plz quick a natural resource that is replaceable through a cycle in nature or sustainable practice is called a? the subject is science