Land where it is possible to grow crops is called A. organic land
B. agricultural land
C. vegetative land
D. All of the above

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

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.