How does the introduction of non -native species affect ecosystems?

What is the difference between how ionic and covalent bonds form

Which statement describe events that occur during interphase?

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