The phytohormone, which increases the concentration of potassium in guard cells is also responsible for the induction of
Apical dominance
Triple response growth
Cell division
abscission
The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodules is
Amminase
Nitrogenase
Nitrate reductase
Nitric reductase.
When pea seeds and wheat grains are soaked in water pea seeds showed more swelling than the wheat. The reason is
Imbibition capacity of proteins is more than that of starch
Presence of less hydrophilic colloids in the wheat grains.
Cell membrane of pea is more permeable
Cell wall of wheat grains are less permieable.
Cell-A has osmotic potential of -18 bars and pressure potential of 8 bars, whereas, cell-B has osmotic potential of -14 bars and pressure potential 2 bars. The direction of flow of water will be
From cell- B to cell- A
From cell –A to cell- B
No flow of water
In both the directions
The number of essential nutrients needed in plant is
16
5
4
8
Copper is present in
Plasmalemma
Plastoquinone
Plastocyanin
Ferredoxin
The potential energy of water is referred as
Water potential
Osmotic potential
Gravity potential
Pressure potential
‘Mottled chlorosis’ on the leaves occurs due to the deficiency of
Nitrogen
Phosphorus
Potassium
Sulphur
Zn, Mo, Fe, Cu are
Trace elements
Non-essentials
Macronutrients
None of these
The conversion of nitrate to nitrogen is called
Nitrification
Denitrification
Ammonification
Nitrogen fixation
