moisture from leaves is produced by transpiration. why can you use the presence of moisture as evidence of it?

Question

i need to know if you can use it as evidence of it breathing or exchanging gases. can you tell me the answer for a fourth grader. it is like this moisture from leaves is produced by transpiration why can you use the presence of moisture as evidence that a plant is exchanging gases or breathing.

Answer 1

Not really, because transpiration is not the only source for moisture on leaves.

You must also take into account Condensation (dew) as well as other external sources of moisture which can equally account for the presence of any moisture.

{Edited to add}
I wish you could add a second reply.

That's true Olivetez, the presence of water can be attributed to transpiration so essentially there should be no real reason why you could not use it as [i]evidence[/i] as long as the student understands that there are other sources for the water as well and thus the mere presence of water is not definitive of transpiration.

For example, the actual fruit of a tomato does not transpire because the skin is water-tight allowing it to swell, but is frequently found with drops of moisture on it.

Answer 2

transpiration is a loss of water through stomata or cuticle of the leave these two parts of leave are also usd for the exchange of gases.presence of moiture on the leaves indicate that stomta are open and transpiration is continue .and so is the exchange of gases through open stomata or cuticle

Answer 3

Transpiration is the evaporation of water from aerial parts of plants, especially leaves but also stems, flowers and fruits. Therefore, when water is being evaporated, won't you find water there??

Answer 4

Yes , ypu can get the evidence by covering the plant with plastic bag or putting a bell-jar over it.