Scientific Method: Identifying Controls and Variables

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Aragonite shells of clams, snails, or scleractinian corals may be preserved unaltered in cenozoic deposits, but they are generally dissolved or recrystallized in older deposits. true or false