Transport in Plants Question 40
40. Guard cells help in:
[2009]
(a) transpiration
(b) guttation
(c) fighting against infection
(d) protection against grazing
Show Answer
Answer : a
Hints & Solutions
(a) Guard cells help in transpiration. Transpiration is the evaporation of water from the aerial parts of plants, especially leaves but also stems, flowers and roots. Stomatal opening allows the diffusion of carbon dioxide and oxygen during photosynthesis.
