The most important function of cytokinins (zeatin is a cytokinin present in Zea mays - the corn) is the promotion of cell division. These are now established as true cell division factors.

Correct Option: C

The most important function of cytokinins (zeatin is a cytokinin present in Zea mays - the corn) is the promotion of cell division. These are now established as true cell division factors.

All movements except nyctinastic movement are related to auxin. Nyctinastic (sleeping) movement of leaves is due to diurnal changes. (changes in day and night).

Correct Option: C

All movements except nyctinastic movement are related to auxin. Nyctinastic (sleeping) movement of leaves is due to diurnal changes. (changes in day and night).

Phototropic movements are the plant responses towards light. Generally plant shoot and flower show positive phototropism while geotropism is the plant response to the gravity of earth. Generally roots are positively geotropic. All these movements are linked to Auxin.

Correct Option: C

Phototropic movements are the plant responses towards light. Generally plant shoot and flower show positive phototropism while geotropism is the plant response to the gravity of earth. Generally roots are positively geotropic. All these movements are linked to Auxin.

Abscisic acid as the name suggests cause abscission due to which leaves fall. It also acts as a growth inhibitor & induces bud dormancy in various plants.

Correct Option: B

Abscisic acid as the name suggests cause abscission due to which leaves fall. It also acts as a growth inhibitor & induces bud dormancy in various plants.

Highest concentration of auxins occurs at the growing tips. This was proved by Went in 1928 by his experiment on Avena coleoptile. It was demonstrated that auxins are synthesized at the tips and then translocated downwards where they cause growth.

Correct Option: A

Highest concentration of auxins occurs at the growing tips. This was proved by Went in 1928 by his experiment on Avena coleoptile. It was demonstrated that auxins are synthesized at the tips and then translocated downwards where they cause growth.