Which of the following explains why it is necessary for the body to eliminate waste?

to allow body to maintain current in balance
to keep the internal enviroment in balance
to make room for nutrients coming in

What are the fixed alleles in the human species? o a. the alleles that are on the most chromosomes b. the alleles that change most often 000 c. the alleles that no one has d. the alleles that everyone has

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

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.