Botany - Plant Growth and Development Question with Solution | TestHub

$\mathrm{2,4}–D$is the synthetic or exogenous auxin. 2,4-Dichlorophenoxyacetic acid (usually called 2,4-D) is an organic compound with the chemical formula C₈H₆Cl₂O₃. It is a systemic herbicide which selectively kills most broadleaf weeds by causing uncontrolled growth in them, but it leaves most grasses such as cereals, lawn turf and grassland relatively unaffected.