The cochlea is responsible for sound transduction.
Pepsin is produced in the stomach and breaks some of the peptide bonds in polypeptide chains.
Answer:
What do you need to be answered
Explanation:
The correct answer is (a.) a mutation of the hemoglobin allowing better oxygen-carrying capacity. The mutation of the hemoglobin that allows a better oxygen-carrying capacity would be the most beneficial to an elephant and its descendants.