Question

In an experiment to compare water loss, four similar leaves are treated with petroleum jelly (Vaseline) and left on a table for 1 hour.


Leaf 1 upper surface only covered
Leaf 2 lower surface only covered
Leaf 3 both surfaces covered
Which shows the water loss from the leaves?

Answer 1

Answer:

Most water loss is shown by leaf 1 since only the upper part is covered whereas transpiration occurs more from the lower surface of the leaf.

Leaf 2 shows lesser water loss since the lower surface is covered by petroleum jelly which has a major role in transpiration.

Leaf 3 has no loss of water since both surfaces are covered.

I hope this helps!