Given below is the diagram of an experimental setup to study the process of Transpiration. Cobalt chloride papers are fixed on the upper as well as lower surface of the leaf. Answer the questions that follow: Given below is the diagram of an experimental setup to study the process of Transpiration. Cobalt chloride papers are fixed on the upper as well as lower surface of the leaf. Answer the questions that follow:
Two adaptations in plants to reduce Transpiration are:
Topic: Adaptations to reduce transpiration
Try it
Pick an option and check your answer. The full worked answer is below either way.
Answer
(d) Narrow leaves, Fewer stomata..
BOTH parts of the option must reduce water loss, and only (d) has two that do: NARROW LEAVES — less surface area exposed, so less evaporation FEWER STOMATA — fewer pores through which vapour can escape
Each wrong option pairs a genuine adaptation with something that does the OPPOSITE: (a) narrow leaves (good) with a THIN cuticle — a thin waxy layer is a poorer barrier, so water loss INCREASES. A xerophyte needs a THICK cuticle. (b) fewer stomata (good) with a BROAD lamina — more surface area, so MORE evaporation. (c) sunken stomata (good) with a THIN cuticle again.
THE METHOD for this kind of question: check EACH HALF of every option separately. An option is wrong if either half fails, and examiners build these by pairing one right item with one wrong one.
Narrow leaves, Fewer stomata..