scientists are re-creating the origin of life on Earth in the laboratory. Which of these will be the most important part of the experimental design?

Which of these resources is used worldwide to make construction products, pottery, and porcelain

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Which describes the habitat of a frog?