Is a nonliving part of an ecosystem that gives plants the energy they need to make food. a) sunlight b) a germ c) wind d) oxygen gas

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

The response is the basis for vaccination. primary secondary tertiary none of the above

Solutions to environmental problems in europe must