The macronutrient which is an essential component of all organic compounds, yet not obtained by plants from soil is
Options
(a) nitrogen (b) carbon (c) phosphorus (d) magnesium
Correct Answer:
carbon
Explanation:
No […]
Water lost by transpiration is
Options
(a) rich in dissolved minerals (b) rich in solutes (c) pure water (d) rich in dissolved salts
Correct Answer:
pure water
Explanation:
No explanation available. Be the […]
Due to nitrogenous deficiency chlorosis occur in
Options
(a) younger leaves (b) first younger than older (c) older leaves (d) first older than younger
Correct Answer:
first older than younger
Explanation:
No explanation […]
Plants require which one of the following for the formation of ATP
Options
(a) N, Ca (b) N, P (c) N, Cu (d) K
Correct Answer:
N, P
Explanation:
No explanation available. Be […]
Which cells on grass leaves help in minimizing cuticular transpiration?
Options
(a) guard cells (b) bulliform cells (c) subsidiary cells (d) endodermal cells
Correct Answer:
bulliform cells
Explanation:
No explanation available. Be the […]
Osmosis is a type of
Options
(a) imbibition of solution (b) diffusion of solvent (c) evaporation of water (d) diffusion of solute
Correct Answer:
diffusion of solvent
Explanation:
No explanation available. Be the […]
When a potato piece is kept in a concentrated salt solution then
Options
(a) potato is plasmolysed (b) potato cells get bursted (c) potato is deplasmolysed (d) there is no effect due to […]
Which pigment is essential for nitrogen fixation by leguminous plants
Options
(a) anthocyanin (b) phycoerythrin (c) phycocyanin (d) leghaemoglobin
Correct Answer:
leghaemoglobin
Explanation:
No explanation available. Be the first to write the explanation […]
The cohesive force existing between molecules of water is contributing to
Options
(a) plasmolysis (b) translocation (c) ascent of sap (d) osmosis
Correct Answer:
ascent of sap
Explanation:
No explanation available. Be the […]
Nitrates are converted into nitrogen by
Options
(a) denitrifying bacteria (b) carbon fixing bacteria (c) nitrogen fixing bacteria (d) phosphorus fixing bacteria
Correct Answer:
denitrifying bacteria
Explanation:
No explanation available. Be the first […]
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