Opening of floral buds into flowers, is a type of
Options
(a) autonomic movement of variation (b) paratonic movement of growth (c) autonomic movement of growth (d) autonomic movement of locomotion.
Correct Answer: […]
Movement of touch is called
Options
(a) lithotropism (b) thigmotropism (c) phototropism (d) thermotropism
Correct Answer:
thigmotropism
Explanation:
Thigmotropism is a directional curvature movement of growth which is produced in response to the […]
Movement of stomatal opening and closing and opening of Oxalis flower share the common feature that both are
Options
(a) photonastic (b) thigmonastic (c) seismonastic (d) thermonastic
Correct Answer:
photonastic
Explanation:
Photonastic movement […]
Movement of Drosera is
Options
(a) thermonastic (b) seismonastic (c) photonastic (d) thigmonastic
Correct Answer:
thigmonastic
Explanation:
Thigmonastic movement due to touch. In Drosera movement is induced by contact of insect hence thigmonastic.
Legume seeds exhibit dormancy because of
Options
(a) Undeveloped embryo (b) Hard seed coat (c) Absence of cytokinin (d) Absence of GA₃
Correct Answer:
Hard seed coat
Explanation:
Seed of many plants including […]
Induction of flowering by low temperature treatment is
Options
(a) photoperiodism (b) pruning (c) vernalization (d) cryobiology
Correct Answer:
vernalization
Explanation:
Photoperiodism is the response of plants to the relative lenght of day […]
In plants, the induction of flowering, by low temperature treatment, is called
Options
(a) vernalisation (b) photoperiodism (c) pruning (d) cryobiology
Correct Answer:
vernalisation
Explanation:
Photoperiodism is the response of plants to the relative […]
In germinating seed food supply is done by
Options
(a) auxin (b) gibberellin (c) cytokinin (d) ethylene
Correct Answer:
gibberellin
Explanation:
Gibberelin promotes seeds germination. During seed germination, especially of cereals, gibberelins stimulate the […]
Hypothetical plant hormones are
Options
(a) florigen (b) vernalin (c) florigen and vernalin (d) auxin
Correct Answer:
florigen and vernalin
Explanation:
The commonly recognized classes of plant hormones are the auxins, gibberelins, cytokinins, abscisic […]
Hormone involved in phototropism is
Options
(a) kinetin (b) IAA (c) gibberellins (d) 2,4-D
Correct Answer:
IAA
Explanation:
Phototropism is the bending response of shoots towards the source of light. It is promoted by […]
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