Whales have a pelvic and leg bone, even though they do not walk on their legs. which term is used by scientists to describe this phenomenon?

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?

Which describes the chemical reaction taking place?