Plant Physiology - Plant Growth & Development

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Q1. Which hormone is involved in the process of apical dominance? (2019)

Solution:

Auxins are primarily responsible for maintaining apical dominance by inhibiting the growth of lateral buds.

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Q2. Which hormone is primarily involved in the response of plants to drought stress? (2023)

Solution:

Abscisic acid plays a crucial role in helping plants respond to drought stress by closing stomata.

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Q3. What is the primary role of auxins in apical dominance? (2019)

Solution:

Auxins inhibit the growth of lateral buds, maintaining apical dominance and directing growth towards the apex.

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Q4. Which plant hormone is primarily associated with apical dominance? (2023)

Solution:

Auxins are responsible for apical dominance, suppressing the growth of lateral buds.

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Q5. What is the effect of photoperiod on flowering in plants? (2020)

Solution:

Photoperiod is crucial in determining the timing of flowering in many plants, influencing their reproductive cycle.

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Q6. Which of the following is a characteristic of gibberellins? (2019)

Solution:

Gibberellins promote flowering and are also involved in seed germination and stem elongation.

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Q7. Which of the following processes is influenced by auxins? (2021)

Solution:

Auxins influence various processes including phototropism, gravitropism, and apical dominance.

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Q8. Which plant hormone is primarily involved in the elongation of stems? (2023)

Solution:

Gibberellins are primarily responsible for stem elongation by promoting cell division and elongation.

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Q9. Which plant hormone is known to induce abscission of leaves and fruits? (2022)

Solution:

Ethylene is known to promote the abscission of leaves and fruits in plants.

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Q10. Which plant hormone is primarily involved in apical dominance? (2023)

Solution:

Auxins are primarily responsible for apical dominance, suppressing the growth of lateral buds.