Question

Through their effects on plant growth regulators, what do the temperature and light control in the plants?

• A. Flowering
• B. Apical dominance
• C. Fruit elongation
• D. Closure of stomata

Answer 1

The correct option is A

Flowering

The correct option is A.

Explanation of the correct option:

Option A:

1. Through the use of plant growth regulators, temperature and light regulate flowering in plants.
2. Vernalization and photoperiodism are the terms used, respectively. For example, plants with long days need to be exposed to light for longer than the crucial period, whereas plants with short days need to be exposed to light for shorter than the critical period.
3. Vernalization, a time of low temperature required by some plants to trigger blooming, is the process.

Explanation of the incorrect options:

Option B:

1. The longitudinal development of apical features, such as plant stem tips, is referred to as apical dominance.
2. The auxins regulate this.

Option C:

1. Gibberellins, which are plant growth regulators, are primarily responsible for fruit elongation.
2. In apples, this is evident. The fruits' form is likewise improved by the gibberellins.

Option D:

1. Abscisic acid, an inhibitor of plant growth, is the primary regulator of stomata closure in the epidermis.
2. Temperature and light play very little to no part in this.

Final answer: The temperature and light control in the plants causes flowering.