Which of these does the sun provide in large amounts? 1.glucose
2.energy
3.oxygen
4.carbon dioxide

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

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 organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi