23) Tiny animals, called coral polyps, that secrete limestone create a. Barrier islands b. Coral reefs c. Swamps d. Salt marshes​

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples

What are 3 reasons that natural selection occurs