-Medulla in a human is smaller (medullary index of less than one-third); and medulla in animals is very thick (medullary index of one-half or greater).
- Cuticle in humans is imbricated; and the cuticle in animals is coronal or spinous.
- Pigmentation in animal hair is denser than human hair.
- Animal hair can change colors in banded patterns; human hair cannot.
Answer:
It's D, protons. hope this helps you :)
Answer:
the last answer seems to be correct
Explanation:
The top layer carry out photosynthesis
