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Agata [3.3K]
2 years ago
8

3. When (what year) were stone tools first used?

Biology
1 answer:
Dima020 [189]2 years ago
4 0
Stone tools we’re first used around 3,300 BCE
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Passive transpoet is the movement of particulars across the membrane from area of what to an area of what
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Answer:

Passive transport is the movement of particulars across the membrane from area of <u>high</u> to an area of <u>low</u> concentration.

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What enables passive transport is the concentration gradient of a particle, which moves across the membrane from a site of high concentration to a site of low concentration.

Two known forms of passive transport are <u>simple diffusion</u> and <u>facilitated diffusion</u>.

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