How would life be different without penicillin

What happens when light is scattered?

What three things determine the shape and size of a puddle when water is poured out onto a surface

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.