Cytokinins, Ethylene and ABA — Prelims Questions

Which of the following plant hormones is a gaseous substance primarily involved in fruit ripening and senescence?

Which of the following is NOT a physiological effect of cytokinins?

Abscisic Acid (ABA) is often referred to as the 'stress hormone' due to its role in:

Which of the following pairs of plant hormones are generally antagonistic in their effects on seed dormancy and germination?

In plant tissue culture, if the goal is to induce shoot differentiation from a callus, which of the following hormone ratios would be most appropriate?

The 'Richmond-Lang effect' is associated with which plant hormone and what does it describe?