How does a chemical equation differ from a mathematical equation?​

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above