In a food chain, which are
the most efficient users of
solar energy: herbivores, carnivores, omnivores or parasites?

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

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.