Describe the difference between an open and a closed circulatory system

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

Which of th following best describes how genes produce traits in an organism?