What happens when molecular compounds melt?

List four observations that indicate that a chemical reaction may be taking place

Why is the structure of molecule important to its function?

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.