Which of the following hormones is a weak organic acid having unsaturated ring structures and is derived from an amino acid?

One of the synthetic auxins is

Which hormone is responsible for apical dominance?

When does the formation of the abscission layer occur?

Abscission of fruits is prevented by

You are provided with a tissue to initiate differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to induce the development of shoots and roots?