A pathway by which a chemical element or molecule moves through both biotic and abiotic compartments of an ecosystem.

What causes sea water to become less salty? A. Melting Sea ice B. River inflow C. Rain D. All of the above E. None of the above

What is the structure of dna that watch crick and franklin contributed to discover?

What can be recycled to form new paper products?

Does water move in or out of cell during hypotonic and hypertonic solutions?

The cells in your body need nutrients and other materials to stay alive. To be used by your cells, the materials must be a. slightly acidic b. eukaryotic c. dissolved in fluid d. transgenic

What pest invades the fungus gardens that the ants maintain?

In which part of the heart do the endocardium extensions form? atria aorta SA node valves ventricles

The membrane lining the medullary cavity is the?

How do you tell the gender of a kitten?

What happens when one air mass meets another? a. they both die out b. they both become hurricanes c. there is a storm d. none of the above