How do humans affect the greater food web? in this model, how could humans who do not live in the ecosystem still manage to alter the flow of energy within the web?

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

How do cells grow and reproduce to maintain homeostasis?

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?