Coiling of garden pea tendrils around any support is an example of :
Correct answer: C. Thigmotropism .
- A. Thigmotaxis
- B. Thigmonasty
- C. Thigmotropism .
- D. Thermotaxis
Explanation
(c) : The growth movement in response to touch, or contact of a foreign body, in plants is called thigmotropism or thigmotropic movement. The stems and tendrils of the climbers are positively thigmotropic in their response. The coiling of garden pea tendrils around any support is an example of thigmotropism. Thigmonastic (haptonastic) movements are induced by some external stimuli. For example, tentacles of Drosera leaf curve and the lamina lobes of Dionaea fold on coming in contact with an insect.
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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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