In succulent plants, the stomata open during the night and close by the day; which of the following would be the best hypothesis to explain the mechanism of stomatal action in night only?
A. Low CO2 concentration accumulates organic acids resulting in the increased concentration of the cell sap
B. Absorption of CO2 and its conversion to organic acids, results in the increased uptake of potassiumions and water
C. CO2 is used up and increased pH results in the accumulation of sugars
D. None of the above
Answer: Option B
Solution(By Examveda Team)
In succulent plants, the stomata open during the night and close by the day, the best hypothesis to explain the mechanism of stomatal action at night only is the Absorption of CO2 and its conversion to organic acids, which results in the increased uptake of potassium ions and water.Higher than ambient CO2 concentrations mediate a closure of stomatal pores in plants and conversely, low CO2 concentrations trigger the opening of stomatal pores.
In succulent plants, during the night, there is incomplete oxidation of carbohydrates and accumulation of organic acids without the release of CO2.
This Question Belongs to Agriculture >> Genetics And Plant Breeding
Genetic code was discovered by
A. Khorana and Methaei
B. Flemming and Methaei
C. Holley, Nirenberg and Khorana
D. Holley and Nirenberg
Progeny of breeder seed is referred to as
A. Breeder seed
B. Nucleus seed
C. Foundation seed
D. Certified seed
Molecular basis of organ differentiation depends on the modulation in transcription by
A. RNA pol
B. Transcription factor
C. Anticodon
D. All of the above
The phenomenon of linkage was first observed by
A. Bateson and Punnet
B. Nilson
C. Hugo de Vries
D. Mendel
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