What is the difference between osmosis and diffusion?

Osmosis is the movement of water molecules form a higher water potential to a lower water potential through a semi-permeable membrane whist diffusion is the movement of molecules from a region of higher molecular concentration to a region of lower molecular concentratuion until equilibrim is reached

The open ocean begins at the low-tide mark and extends to the end of the continental shelf

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

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