What is the correct equation for k?

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.

Areaction in which products can react to re-form reactants is

Nan element’s square on the periodic table, the number with the greatest numerical value represents the