Question

Write the functional activity of the following structures:

Stomata

Lenticels

Cuticle

Hydathodes

Guard cells

Answer 1

Name	Function
Stomata	(a) Loss of water vapours due to transpiration. (b) Gaseous exchange.
Lenticels	They help in gaseous exchange.
Cuticle	It protects the surface and reduces water loss.
Hydathodes	Plants secrete excess of water through hydathodes when atmosphere is very humid and transpiration process cannot occur.
Guard cells	(a) Control the size of the aperture. (b) Also help in photosynthesis as they contain chl oroplasts also.