Which one of the following interspecies relationships has a negative effect on both species?
a. predation
b. competition
c. commensalism
d. parasitism

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

Areal dna molecule consists of thousands of these pairs of nucleotides. what is the pairing arrangement of the nitrogen bases