Plant Growth and Development

An aquatic plant, Cabomba caroliniana, shows substantial developmental plasticity. The submerged leaves of the plant are feathery (which are not damaged due to flowing underwater currents) while leaves on the surface…

Coleoptiles are the growing part of shoots in monocot plants. Peter Boysen-Jensen performed the famous experiment on phototropism of shoots in monocot plants. Later, Frits Went extended the experiments. Some of the…

Assertion : Gibberellic acid increases length of grape stalks. Reason : Ethophon hastens fruit ripening in tomato and apple.

Read the given statements and identify the PGRs $X, Y$ and $Z$. $\mathrm{X}$ induces accumulation of salts inside the cells. Y promotes rapid elongation of leaf bases and internodes in deep water rice plants. (iii)…

Which of the following sets does not include all natural plant growth regulators?

Which of the following is not a bioassay for cytokinins?

One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third hormone increases the tolerance of plants to various stresses. They are respectively

Assertion : On plotting the length of the root against time, a linear curve is obtained. Reason : An elongating root exemplifies arithmetic growth.

Which of the following plant growth regulators (PGRs) promotes root initiation, flowering and induced parthenocarpy?

Phytohormones are

Bud dormancy is induced by

In an experiment freshly hatched larvae of an insect (Khapra beetle) were reared on a basal diet (complete diet without cholesterol) with increasing amounts of cholesterol. Results obtained are shown in the graph given…