Answer:
In cells, some molecules can move down their concentration gradients by crossing the lipid portion of the membrane directly, while others must pass through membrane proteins in a process called facilitated diffusion.
Explanation:
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Answer:
I think B
Explanation:
Because it is not a physical weathering example, it is not based on the weather it is based on a growing plant.
Explanation:
Phototropism- a response to <u>light stimulus</u> that directs the stem to grow toward the light and roots to grow away from it.
ii. Gravitropism- Stems and leaves grow away from the force of <u>gravity</u> while roots grow toward it.
iii.Thigmotropism - growth in response to <u>touch stimulus.</u> The side of the stem in contact with the object grows slower than the side not in contact. This causes the vine to twist around the object.
