Type a paragraph explaining how the atoms in sugar molecules can be used to form amino acids and other large carbon-based molecules. Cite Work

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation