Fundamentholfundamenthol
NEET2024Biology
Q.

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin:

  1. A

    does not affect mature monocotyledonous plants

  2. B

    can help in cell division in grasses, to produce growth

  3. C

    promotes apical dominance

  4. D

    promotes abscission of mature leaves only

Solution

Synthetic auxins such as 2,4-D are used as selective weedicides on lawns because dicot weeds are killed by them, while mature monocots like grasses are largely unaffected. Hence the lawn grass survives while broad-leaved weeds are removed.

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