The smallest known type of infectious agent is:

A. Rickettsias
B. Protozoans
C. Viruses
D. All of the above

Can you tell the size of a woman's coxal bone by observation?

What is the function of reverse transcriptase in retroviruses? a) it uses viral rna as a template for dna synthesis. b) it converts host cell rna into viral dna. c) it translates viral rna into proteins. d) it uses viral rna as a template for making complementary rna strands.

If your goal is to improve your person relationships with your friends at school, which category would it fall into? a. physical b. emotional c. social d. academic