Answer:
Codon
Explanation:
A codon is a group of 3 nucleotide bases
Observing the aggression of the other groups
Low concentration to high concentration and requires energy
Do you mean by-product? Because in that case no. Oxygen is not a by-product of the Krebs Cycle, but Carbon Dioxide is.
<span>recombination of alleles through meiosis and fertilization</span>