Question

. Which of the following sentences gives the correct reason:

i)Guard cells swell up during the day and shrink at night

ii) Guard cells swell when water flows into them causing the stomatal pore to open.

iii) They shrink when water moves out and the stomatal pore closes. to open and close at regular intervals.

Answer 1

Answer:

Hey mate here is ur answer mark it as brainliest

Explanation:

When water flows the guard cells become turgid (high water content). Their thin outer walls become convex and bulge out so that their inner walls are drawn out causing opening of stomata. If guard cells lose water, they become flaccid and their walls come back to the original position causing closing of stomata.

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