What organelle can we live without?

Mitochondria

You can't survive without mitochondria, the organelles that power most human cells.

mitochondria

Explanation:

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answer; i believe the correct answer is ( proteins );

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.