Bc you should know i guess
The answer is H. He is mechanically digesting his food.
I believe animals that possess homologous structures probably evolved from the same ancestor. Homologous structures are similar because of common ancestry. A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor.
Answer:
the paired bases( nitrogenous bases )
