Organs of limited size and structure are a. analogous structures
b. vestigial structures
c. homologous structures
d. unrelated structures

Isotopes of the same element have differ in their

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.

What are the characteristics of subsystem