The lowest water potential is found in
Options
(a) leaves (b) xylem (c) root hair (d) phloem
Correct Answer:
phloem
Explanation:
The lowest water potential is found in phloem because phloem transports solutes […]
The internal factor affecting transpiration is
Options
(a) oxygen (b) nitrogen (c) carbon dioxide (d) sunken stomata
Correct Answer:
sunken stomata
Explanation:
Transpiration is the process of loss of water in the form […]
The function of leghaemoglobin in the root nodules of legumes is:
Options
(a) inhibition of nitrogenase activity (b) oxygen removal (c) nodule differentiation (d) expression of nif gene
Correct Answer:
oxygen removal
Explanation: […]
The factor most important in regulating transpiration is
Options
(a) temperature (b) light (c) wind (d) relative humidity
Correct Answer:
temperature
Explanation:
Temperature is the most important factor that regulates transpiration. Transpiration takes […]
The degree of opening of stomata is determined by
Options
(a) Porometer (b) Calorimeter (c) Potometer (d) Porometer & Calorimeter & Potometer
Correct Answer:
Porometer & Calorimeter & Potometer
Explanation:
No explanation available. […]
The deficiency of this micro nutrient results in ‘little leaf’ disease.
Options
(a) copper (b) Zinc (c) boron (d) iron
Correct Answer:
Zinc
Explanation:
No explanation available. Be the first to write the […]
The deficiencies of micronutrients not only affects the growth of the plants but also its vital functions, such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements will […]
The cellular transport method which involves use of transmembrane proteins without energy expenditure is called
Options
(a) diffusion (b) facilitated diffusion (c) active transport (d) exocytosis
Correct Answer:
facilitated diffusion
Explanation:
No explanation […]
Technique of growing plants without soil in nutrient solution is called
Options
(a) hydroponics (b) aquaculture (c) parthenogenesis (d) tissue culture
Correct Answer:
hydroponics
Explanation:
No explanation available. Be the first to write […]
Stomatal movement is not affected by
Options
(a) CO₂ concentration (b) O₂ concentration (c) Light (d) Temperature
Correct Answer:
O₂ concentration
Explanation:
Light, temperature and concentration of CO₂ affect opening and closing […]
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