Answer:
A. The respiratory control center senses the need for more oxygen, which causes the trachea to push and pull air more forcefully.
Explanation:
Answer:
A
Explanation:
Epipelagic zone is the one closest to the surface and is the best lit.
B as the broken down molecules can be made into useful substances for the body
Greater body size and facial gracility documented in Homo erectus are likely related to changes in tool technology and increasing access to meat and other proteins. Homo erectus walked just like a modern human, with traits like double arches and adducted big toe, they had a cranial capacity range from 650 cc to 1,200 cc.