why not
Having an airtight seal in the potometer is necessary to ensure that there is no air leakage into the system, which could disrupt the measurement of water uptake by the plant. An airtight seal helps maintain a constant pressure within the potometer, allowing for accurate and reliable measurements of transpiration rates.
to prevent the air from the atmosphere flow into potometer
To create an airtight seal.
Only those which have a hermetical seal, for example caskets with a gasket seal. But: even the best seal does not hold forever.
THe seal on a mason jar is totally airtight. This seal keeps foods preserved inside the jars.
That just refers to a seal that is gas (air, specifically) tight.
An O ring.
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Ziplocks are food storage bags that have an airtight zip that may be used to seal them.
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9 seconds.
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