Question 1:
Name three examples of phytohormones and state their functions.
Answer:
Three phytohormones and their functions:
• Auxin stimulates cell growth and elongation in roots and shoots.
• Ethylene stimulates ripening in fruits.
• Gibberellin stimulates the division and elongation in the stem cells.
Name three examples of phytohormones and state their functions.
Answer:
Three phytohormones and their functions:
• Auxin stimulates cell growth and elongation in roots and shoots.
• Ethylene stimulates ripening in fruits.
• Gibberellin stimulates the division and elongation in the stem cells.
Question 2:
How does auxin control shoot phototropism in the dark?
Answer:
In the dark, the auxin distribution at the shoot tip is even. The shoot will thus grow straight upwards.
How does auxin control shoot phototropism in the dark?
Answer:
In the dark, the auxin distribution at the shoot tip is even. The shoot will thus grow straight upwards.
Question 3:
Mr. Farid who sells apples at a supermarket usually separates apples that are too ripe from those that are ripe.
Justify his action.
Answer:
Fruit that is overripe will produce more ethylene gas. This gas will cause the other fruits to ripe and spoil quickly.
Mr. Farid who sells apples at a supermarket usually separates apples that are too ripe from those that are ripe.
Justify his action.
Answer:
Fruit that is overripe will produce more ethylene gas. This gas will cause the other fruits to ripe and spoil quickly.