AP BIOLOGY

LABORATORY REVIEW

TRANSPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The thickness of the cuticle ____ transpiration
A
Increases
B
Decreases
C
Remain same
D
None of these
Explanation: 

Detailed explanation-1: -The cuticle is a waxy substance that is present on the surface of leaves. It prevents excessive loss of water from the plant by transpiration. The greater the thickness of the cuticle lesser is the transpiration rate.

Detailed explanation-2: -Common adaptations to reduce the rate of transpiration include: Thick waxy cuticle: The cuticle cuts down water loss in two ways: it acts as a barrier to evaporation and also the shiny surface reflects heat and so lowers temperature.

Detailed explanation-3: -Desert plants tend to have thicker cuticles to cut down transpiration. The thicker cuticle will help to reduce water loss through leaves.

Detailed explanation-4: -i) the thickness of cuticle is inversely proportional to the influence of light and carbon dioxide entering into the leaf. The cuticle is the waxy layer present on all above-ground tissue of a plant and serves as a barrier to water movement out of a leaf. so less light will enter and less transpiration will occur.

Detailed explanation-5: -The plant cuticle is a lipidic layer of cutin intermeshed and coated with waxes that covers essentially all aerial organs and functions to restrict transpiration.

There is 1 question to complete.