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Biology
Plant Growth and Development
85 questions from 33 papers, each with its answer.
- 85 questions
- 33 papers
- 2.41% of Biology
Plant Growth Regulators - Cytokinins
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Which of the following growth regulators is an adenine derivative?Cytokinins (e.g. kinetin) are adenine derivatives. Auxin (IAA) is derived from the amino acid tryptophan, abscisic acid is a carotenoid (violaxanthin) derivative, and ethylene is a gaseous hormone derived from methionine.
Differentiation, Dedifferentiation and Redifferentiation
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The phenomenon by which the undividing parenchyma cells start to divide mitotically during plant tissue culture is called as:Living differentiated cells that had lost the capacity to divide regaining the capacity of division (e.g. parenchyma cells in tissue culture forming callus) is called dedifferentiation.
Plasticity
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The ability of plants to follow different pathways in response to environment leading to formation of different kinds of structures is called:Plasticity is the ability of plants to follow different pathways in response to the environment or phases of life to form different kinds of structures (e.g. heterophylly).
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