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Which of the following is most important factor in regulation of transpiration?
Options
(a) humidity
(b) light
(c) temperature
(d) all of these
Correct Answer:
all of these
Explanation:
A number of external and internal factors influence the rate of transpiration. Among the internal factors are root/shoot ratio, leaf area and leaf structure. External or environmental factors, include
(i) Relative humidity – If R.H. is low then rate of transpiration depends upon difference in vapour pressure or internal atmosphere of leaf and external environment (i.e., V.P gradient) and it is, therefore, that no transpiration occurs when stomata are fully open but relative humidity is 100%.
(ii) Light
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Topics: Transport and Nutrition in Plants
(163)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Human immuno deficiency virus HIV has a protein coat and a genetic material
- The finches of Galapagos islands provide an evidence in favour of
- In cockroach the ootheca is formed by the secretion of
- Conifers differ from grasses in the
- Vascular tissues in flowering plants develop from:
Topics: Transport and Nutrition in Plants (163)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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