Differentiate between the following pairs on the basis of what is mentioned in the brackets:
Transpiration and Guttation (place of occurrence)
Topic: Transpiration and guttation
Answer
TRANSPIRATION occurs through the STOMATA of the leaves, and to a smaller extent through the CUTICLE and the LENTICELS of woody stems.
GUTTATION occurs through the HYDATHODES, at the tips and margins of leaves.
The brackets restrict the comparison to PLACE OF OCCURRENCE, so that must be the basis of your answer. Writing about the form of water, however correct, does not answer what was asked — though adding it as a second row does no harm.
Read the brackets in every "differentiate" question of this type; they are there precisely to stop a memorised full comparison.
The two are easy to fix together: TRANSPIRATION gives water VAPOUR through STOMATA; GUTTATION gives water DROPS through HYDATHODES.
| Point of difference | Transpiration | Guttation |
|---|---|---|
| Place of occurrence | Stomata, cuticle and lenticels | Hydathodes at leaf tips and margins |
| Form of water lost | Water vapour | Liquid drops |
| Time | Mainly during the day | At night or early morning |