Substances which originate at the tip of stem and root and control the growth and development are

Enzymes

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Hormones

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Vitamins

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Food substances

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Solution

The correct option is B Hormones
Substances which originate at the tip of stem and root and control the growth of different organs are hormones. Growth in plants is regulated by a variety of plant hormones, including auxins, cytokinins and growth inhibitors, primarily abscisic acid and ethylene.
Thus, the correct answer is option B.

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Chemical substances which originate at the stemtip, but control the growth process elsewhere are

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