Which of the following is not needed to make a model of the water cycle

. an energy source
. water
. a closed container
. a drain

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.

How does the presence of oxygen affect the chemical pathways used to extract energy from glucose?

Which of the following are correct values for the ideal gas laws constant r