Cells need energy to perform all of their functions. Where in the cell is the energy made?

9. the history of life on earth is recorded in

What is the difference between a scientific hypotheses and a scientific theory?

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land