Understanding Oxins and Their Role in Plant Growth

Oxins are crucial plant hormones that regulate growth and metabolism, stored in growing parts like apical meristems. Experiments by Darwin and others demonstrated oxins' role in phototropism, where oat seedlings grow towards light. Cutting the coleoptile tip stops this response, but replacing it restores growth, proving oxins' influence. Oxins have practical applications, such as accelerating rooting and inducing seedless fruit development.

What are oxins primarily responsible for in plants?

• Regulating growth and metabolism

• Facilitating pollination

• Controlling photosynthesis

• Regulating water absorption

Where are oxins typically stored in a plant?

• In the bark

• In the roots only

• In the flowers only

• In the apical meristems

What did the experiments by Darwin and Boyson demonstrate about oxins?

• Oxins are not affected by light

• Oxins are responsible for phototropism

• Oxins are found only in roots

• Oxins inhibit plant growth

What happens to oat seedlings when the coleoptile tip is removed?

• They produce more seeds

• They stop responding to light

• They change color

• They grow faster

How can oxins be used in agriculture?

• To accelerate rooting in cuttings

• To increase leaf size

• To increase seed production

• To enhance flower color

What is spartanocarpy, and how is it related to oxins?

• A method to increase seed production

• A process to develop seedless fruits

• A way to improve root strength

• A technique to enhance leaf growth