Which conclusion can be drawn based on the sedimentary rock diagram below? a. trilobites are younger than clams. b. snails and clams evolved into mammals. c. all species once lived on land. d. biodiversity increased with time.

Explain the difference between mutations in sex cell and those in somatic cells

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?

Which of the following winds are found in the upper troposphere? a. jet streams b. trade winds c. surface winds d. coriolis winds select the best answer from the choices provided a b c d