8. during the devonian period, animals that could live on land began to evolve. these animals still spent part of their lives in the water. what were these animal called? a. trilobites b. reptiles c. amphibians < -- d. dinosaursme! the one with the < -- is the one i chose,

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?

Do plant cells perform cellular respiration?

Describe how ecosystems recover from a disturbance