Biological anthropologists who study chimpanzees are likely to be

Since Chimpanzees, Apes, and even man are primates, I would say they are likely to be primatologist. Primatology is the scientific study of primates. Man is a primate but most primatologists study non-human primates in diverse fields including biology, anthropology and other areas of science. They work in various environments and fields. Some work in a zoo, and others in a research lab.

The one that most represents the earths mantle would be the skin since the mantle is the upper part of the earths depths which is just like the skin of an apple.