Plants produce oxygen when they photosynthesize. where does the oxygen come from?

All ova contain sex chromosomes corresponding to: x y xx xy

What happens as electrons move along the chain of molecules known as the electron transport chain? they gain energy, which causes atp molecules to lose phosphate groups. they gain energy, which causes h *ions to join with oxygen to produce water. they lose energy, which is then used by the cell to make atp. they lose energy, which is then used to break down atp.

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?