Vernon wonders whether NADPH and ATP should be classified as reactants or as products of
photosynthesis. How should these compounds be classified?
A. As reactants because they are used up by photosynthesis

B. As products because they are generated by photosynthesis

C. As either reactants or products depending on the rate that photosynthesis occurs

D. As neither reactant nor product, because they are recycled instead of made or used up

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.