Do Primary producers generally form the smallest trophic level of a pyramid of energy.

Which statement best describes a hypothesis?

Clear-cutting usually leads to fewer changes in the forest ecosystem than selective cutting. True or False

Earth's thin, rocky outer layer is its A. core. B. mantle. C. crust D. outer core.

Anton Van Leeuwenhoek was the first to refer to cells as what?

Can a phylum be subdivided

3. In which process do substances have to be in direct contact when heat moves from areas of more heat to areas of less heat?

While on an archaeology expedition, you unearth a skeleton with the following characteristics: four long, slender finger bones and a smaller opposable thumb bone, long arm bones, fingernails, and eye sockets close together on a skull.

Describe respiration

Which of the following is a property of minerals? a. Age b. Odor c. Hardness d. Size

What created the abundant agriculture in the Napa Valley of California? A:oceanic-continental convergence B: an earthquake C: a tsunami D:continental-continental convergence