Home
Class 11
BIOLOGY
Why do cut leaves dipped in cytokinins s...

Why do cut leaves dipped in cytokinins stay green for longer duration?

Text Solution

Verified by Experts

1. Ageing of plant organs is retrated by cytokinins.
2. They help in protein synthesis and mobilises nutrient resources.
Promotional Banner

Similar Questions

Explore conceptually related problems

How does photosynthesis take place on plants that have, red, brown and yellow leaves, and are not green? How do they prepare food?

If you are chilly outside the shower stall, why do you feel warm after the bath if you stay in the bathroom? (AS_7)

Why is the colour of a leaf kept in the dark frequently yellow, or pale green? Which pigment do you think is more stable?

a. What happens if a bar magnet is cut into two pieces : (i) transverse to its length , (ii) along its length ? b. A magnetised needle in a uniform magnetic field experiences a torque but no net force . An iron nail near a bar magnet , however , experiences a force of attraction in addition to a torque . Why ? c. Must every magnetic configuration have a north pole and a south pole ? What about the field due to a toroid ? d. Two identical looking iron bars A and B are given , one of which is definitely known to be magnetised. (We do not know which one ) . How would one ascertain whether or not both are magnetised ? If only one is magnetised , how does one ascertain which one ? [Use nothing else but the bars A and B ]

Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why? Answer

Do the same exercise as above with the replacement of the earlier transformer by a 40,000-220 V step-down transformer (Neglect, as before, leakage losses though this may not be a good assumption any longer because of the very high voltage transmission involved). Hence, explain why high voltage transmission is preferred.