Answer:
Scientists did not know how traits were inherited
Explanation:
Scientist before did not know how the trait is passed on not until Griffith's experiment.
Being born with the genes, and evolving to reach food easier
Maybe, IDK Tbh XD
Amino acid reactions. Amino acids via their various chemical functionalities can undergo numerous chemical reactions.
Answer is A. I kid chemistry a while back but I am pretty certain it is A.