As kate is moving down the hill, what type of energy does she have? a. sound energy b. electrical energy c. light energy d. mechanical energy

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

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

Why are human population trends difficult to predict?