Cells
Tissues
Organs
Organ system
Organism
I think the answer is genotype
Dogs, cats and humans each contain approximately 2.5–3 billion base pairs in their DNA, comprising about 20,000–25,000 individual genes.
So we have the same DNA components
Hope this helps! Please correct me if I'm wrong :)
Answer:
A goes with the first box.
b goes with the second box.
c goes with the last box.
Explanation:
Changes in pH change the attractions between the groups in the side chains of the protein.