Grey spots of oat are caused by deficiency of
Mangaese
Iron
Copper
Zinc
Necrosis or death of tissue particularly leaf tissue, is due the deficiency of
N, K and S
N, K, Mg and Fe
Mn, Zn, and Mo
Ca, Mg, Cu, and K
Stomata which can open at night,are present in
Xerophytes
Gametophytes
Hydrophytes
None of these
In osmosis, there is movement of
Solute only
Solvent only
Both (a) and (b)
Neither solute nor solvent
Fensom and Jones suggested which of the following method for translocation of solute?
Osmosis
Plasmolysis
Diffusion
Electrosmosis
The stomata in CAM plants open during
Day
Night
Day and night
Always closed
Which element is located at the centre of the porphyrin ring in chlorophyll ?
Potassium
Manganese
Calcium
Magnesium
The sugarcane plant has
Dumb bell- shaped guard cells
Pentamerous flowers
Reticulate venation
Capsular fruits
Cascuta is a
Parasitic plant
Symbiotic plant
Predator
Decomposer
A leaf peeling of Tradescantia is kept in a medium having 10% NaCl. After a few minutes, if we observe the leaf peel under the microscope, we are likely to see
Entry of water into the cell
The cells bursting out
Diffusion of NaCl into the cell
Exit of water from the cell
