The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. the oxygen comes from

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

What role do traits play in affecting an organisms ability to reproduce? finches

What is the "great pacific garbage patch"? a large area of marine debris concentrated by rotating ocean currents a large area around the pacific rim where debris collects from natural disasters such as tsunamis an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability a large trash dump located in hawaii