Which of the following is appropriate for mass-flow hypothesis?
Transpiration pull is responsible for absorption of ions
Large amount of ions are also absorbed along with the absorption of water
As suction pressure increases, absorption of water increases and along with water, absorption of ion also increases
All of the above
Sunken stomata is found in the leaves of
Trifolium
Lemna
Nerium
Lilium
Guttation is mainly due to
Root pressure
Imbibition
Osmosis
Transpiration
In higher plants, the shape of the chloroplast is
Discoid
Cup-shaped
Girdle-shaped
Reticulate
Hydathodes are also called
Water stomata
Sunken stomata
Guard cells
Subsidiary cells
Sulphur is an important nutrient for optimum growth and productivity in
Pulse crops
Cereals
Oil seed crops
Fibre crops
Which one of the following denotes the water potential of the mesophyll cell in wilted condition?
Equal to the value of osmotic potential
Equal to the value of pressure potential
Greater than the value of its osmotic potential
Equal to zero
Enzyme nitrogenase is responsible for
Nitrification
Nitrogen fixation
Nitrite reduction
Nitrate reduction.
In plants, water supply is due to
Guttation
Adhesion force
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.