Cell elongation in internodal region takes place due to
Options
(a) Gibberellins (b) Ethylene (c) Cytokinins (d) Indole acetic acid
Correct Answer:
Gibberellins
Explanation:
The gibberellins induce elongation of the internodes. The elongation […]
A terrestrial animal must be able to
Options
(a) Actively pump salts out through the skin (b) Excrete large amounts of salts in urine (c) Excrete large amounts of water in urine (d) […]
The main nitrogenous waste of Hydra is
Options
(a) Ammonia only (b) Urea only (c) Uric acid only (d) Both (a)Ammonia only and (c)Uric acid only
Correct Answer:
Ammonia only
Explanation:
The main […]
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 […]
Highest growth is found in
Options
(a) Static phase (b) Exponential phase (c) Descending phase (d) Lag phase
Correct Answer:
Exponential phase
Explanation:
Log phase is the rapid growing phase of plants between lag […]
Chlorophyll in chlroplast is located in
Options
(a) grana (b) pyrenoid (c) stroma (d) Both grana and stroma
Correct Answer:
grana
Explanation:
No explanation available. Be the first to write the explanation for this […]
Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is
Options
(a) ΔS system + ΔS surroundings > 0 (b) ΔS system – ΔS surroundings > 0 (c) […]
Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are -382.64 kJ mol⁻¹ and -145.6 kJ mol⁻¹, respectively. Standard Gibbs energy change for the same reaction at 298 k is […]
The work done during the expansion of a gas from a volume of 4 dm³ to 6 dm³ against a constant external pressure of 3 atm is (1atm = 101.32 J)
Options
(a) -6 […]
IF the bond energies of H – H , Br – Br and H – Br are 433 , 192 and 364 kJ mol⁻¹ respectively, the ΔH° for the reaction H₂(g) + Br₂(g) → 2HBr(g) […]
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