Hormones released during stress condition is
Options
(a) gibberellin (b) auxin (c) ethylene (d) ABA
Correct Answer:
ABA
Explanation:
Abscisic acid (ABA) is a growth inhibitor which is involved in the seed dormancy. Dormant […]
Growth in numbers is maximum in the zone of
Options
(a) cell maturation (b) cell division (c) cell elongation (d) cell maturation & cell division & cell elongation
Correct Answer:
cell division
Explanation:
Zone […]
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 […]
Gibberellin is obtained from
Options
(a) Phytophthora infestans (b) Gibberella fujikuroi (c) Fusarium moniliforme (d) Alternaria solani
Correct Answer:
Gibberella fujikuroi
Explanation:
In Japan certain rice plants were found to suffer from bakanae or […]
Gibberellin promote
Options
(a) seed germination (b) seed dormancy (c) leaf fall (d) root elongation
Correct Answer:
seed germination
Explanation:
Gibberellin promotes seeds germination. During seed germination, especially of cereals, gibberellins stimulate the production […]
Which one of the following growth regulators is known as stress hormone?
Options
(a) Abscissic acid (b) Ethylene (c) GA3 (d) Indole acetic acid
Correct Answer:
Abscissic acid
Explanation:
No explanation available. Be […]
The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:
Options
(a) Microtubules (b) Microfilaments (c) Intermediate filaments (d) Lam […]
The osmotic expansion of a cell kept in water is chiefly regulated by:
Options
(a) Mitochondria (b) Vacuoles (c) Plastids (d) Ribosomes
Correct Answer:
Vacuoles
Explanation:
No explanation available. Be the first to […]
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows ?
Options
(a) Green plants seek light because they are […]
Typical growth curve in plants is :
Options
(a) Linear (b) Stair-steps shaped (c) Parabolic (d) Sigmoid
Correct Answer:
Sigmoid
Explanation:
Sigmoid growth curve maintains equilibrium with carrying capacity, it forms asymptote stage in […]
2017 Copyright Doctor Dreams Training Academy