. What is the source of most ocean pollution? a. activities on land
b..climate changes
C. aquatic animals
d. none of the above

20 the compound al(nh3)2 has atoms of nitrogen.

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient