Which of these body systems has cells that attach to each other to form a leak-proof barrier? Select one:

Endocrine system.

Respiratory system.

Reproductive system.

Urinary system.

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Quick asap will give brainiest ! what best describes the same pattern of tides on earth throughout the day? neap tides spring tides semidiurnal tides nocturnal tides

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.