Which one among the following chemicals is used for causing defoliation of forest trees?
Correct answer: B. 2,4D
- A. Malic Hydrazide
- B. 2,4D
- C. Both A and B
- D. None of these
Explanation
(b) : 2,4D is a famous herbicide or weedicide which especially kills broad leaved weeds. It kills weeds perhaps by over stimulated root growth. Other auxins like 2, 4, 5 T have also been used as defoliants during early sixties.
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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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