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Alfie has two plants, A and B. He used some Vaseline to coat the top of the leaves on plant A and the underside of the leaves on plant B. He left the plants on the windowsill for a week and watered them regularly.

a) What do you expect happened to each plant? Plant A: __________________________________ Plant B: __________________________________

b) Explain the result you have predicted for plant B


I think plant A would use a moderate amount of water and would use the least amount of water. I think plant B would use the least amounts because coating the lower surface causes the water loss similar to coating both surfaces (upper and lower).

What are your thoughts on this?

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    $\begingroup$ Is the plant a dicot or monocot? $\endgroup$
    – JM97
    Commented Apr 5, 2017 at 15:59

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I would try to think about the vaseline layer as a huge cuticle that our man "Alfie" just applied to the plants.

I think you have the right answer here. Just note that there is a typo in the first sentence of your thoughts. You missed a "B" in front of "plant". Took me a bit to understand.

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  • $\begingroup$ Am I missing something? Plant B would have all stomata blocked. $\endgroup$
    – user73989
    Commented Dec 31, 2022 at 21:28

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