The primary precursor of $IAA$ is

  • A
    Phenylalanine
  • B
    Tyrosine
  • C
    Tryptophan
  • D
    Leucine

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Which of the following hormones does not naturally occur in plants?

Which hormone is used to create a hedge in a garden?

Premature fruit drop in orange and pear is prevented by . . . . . . .

According to $F. \text{ Went}$,auxins transmit:

Provide the full names of the following plant growth regulators:
$(1)$ $NAA$
$(2)$ $IPA$

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