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(A) Hereditary variations (mutations) in plants are induced by exposing them to mutagenic agents. $X$-rays are high-energy ionizing radiations that ca

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$X$-rays

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(A) Hereditary variations (mutations) in plants are induced by exposing them to mutagenic agents. $X$-rays are high-energy ionizing radiations that cause changes in the $DNA$ sequence of the plant genome. This technique is widely used in mutation breeding to create genetic variability,which can then be selected for desirable traits. Gibberellic acid and Auxins are plant growth regulators,and $D.D.T.$ is an insecticide,none of which are primarily used to induce hereditary mutations.

Hereditary variations in plants have been produced by the use of

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