The response of different organisms to the environmental rhythms of light and darkness is called :
Correct answer: B. Photoperiodism
- A. Vernalization
- B. Photoperiodism
- C. Phototaxis
- D. Phototropism.
Explanation
b) : Photoperiodism is the response of plants to relative length of light and darkness. Phototaxis is plant movement where the stimulus is light. Phototropism is tropism in which stimulus is light. Vernalization is application of cold treatment to plants to effect flowering.
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About Growth and Development
Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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