8. The phosphorus cycle involves mainly the

a. atmosphere and biosphere.

b. lithosphere and hydrosphere.

c. geosphere and biosphere.

d. asthenosphere and hydrosphere.

Which protein severs as a chemical messenger

Which of the following examples illustrates scientific fraud? George changes the results of his experiment so he will win first prize at the science fair. Naomi refuses to participate in a scientific study because of the potential health risks.

Red-green color blindness is caused by an X-linked recessive gene. In a family, the mother is a carrier of this gene while the father does not have the gene.

During the cell cycle, A) DNA is replicated once before mitosis and again before cytokinesis. B) DNA is replicated during mitosis. C) DNA is replicated before mitosis begins. D) DNA is replicated directly after the completion of mitosis.

Two alleles/letters for one trait that are the same (Ex: DD or dd)

How are local energy systems in the prairie related to global systems?

What do the salary glands the pancreas and the stomach have in common

Which of the following statements is true? Tsunamis happen when backwash is stronger than swash. Mudflows are the slowest form of slope failure. Weathering is the movement of sediment from one location to another.

Where is a proton located in the atom?

List the ways in which tadpoles turn to frogs