The investigators could distinguish human hair from animal hair by the patter of pigmentation and by the medullary index.
The pigmentation in human hairs is denser toward the cuticle, whereas in animal hair is denser toward the medulla. Human hairs are usually one colour throughout the whole length, while animal hairs may change colour suddenly.
The medulla in humans is thinner than in animals: the medullary index for human hairs is 0.33 or less; the medullary index for animal hairs is 0.5 or more.
Migration is D, the seasonal movement of organisms between locations!
I believe the answer is <span>D. High birth rates and low death rates leading to a expanding population. i am not positive but i am pretty sure</span>
Answer:
Deep hydrothermal oceans and the atmosphere
Explanation:
Earth or space are the two possible origins of simple organic compounds on early Earth.
