Which sphere does a dolphin swim in? a. atmosphere b. lithosphere c. magnetosphere d. hydrosphere

An enzyme lowers the energy of activation. what does that mean?

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?

Which of the following statements about protists are true? a.they are typically found in moist environments. b.they are all unicellular. c.they have a nucleus. d.they are all multicellular.