OJEE Plant Growth — practice questions
15 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice OJEE Plant Growth in the app →**Auxins** were first isolated from:Which hormone is gaseous and promotes **fruit ripening**?**Abscisic acid (ABA)** is known as the 'stress hormone' because it:**Photoperiodism** refers to:**Cytokinins** are best known for promoting:Which mineral is needed for **chlorophyll synthesis**?Which element is a constituent of **nitrogenase enzyme** (catalyses biological N₂ fixation)?Calcium deficiency in plants causes:In the **Avena curvature test**, the angle of curvature of the decapitated coleoptile is:The **Richmond-Lang effect** describes the action of:Which is **NOT** correctly paired (hormone–physiological role)?The **'Triple Response'** of seedlings (inhibition of stem elongation, swelling of stem, horizontal growth) isYellowing of **young leaves** (chlorosis of young leaves) suggests deficiency of which element?**Hydroponics** is:The four characteristic events of a typical **sigmoid growth curve** are: