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Phototropism in Plants

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Questions and Answers

What is phototropism in plants?

The phenomenon where plants grow towards light. (correct)

The process of plants growing away from gravity.

The method by which plants lose water.

The reaction of plants to temperature changes.

Which hormone is responsible for stimulating cell elongation in phototropism?

Auxin (correct)

Gibberellin

Cytokinin

Ethylene

What causes a plant to bend towards light during phototropism?

Unequal distribution of roots in the soil.

The weight of the flowers causing lateral growth.

Higher temperatures on the light side.

Differential growth rates on the sides of the stem. (correct)

What role does light play in phototropism?

<p>It serves as a main stimulus directing plant growth.</p> Signup and view all the answers

When can the stimulus for phototropism occur?

<p>It can occur under various conditions including seasonal changes.</p> Signup and view all the answers

Study Notes

Phototropism

Plants grow towards light, this is called phototropism
The plant hormone auxin is produced in the growing tip of the stem
Auxin stimulates cell elongation on the darker side of the stem
This causes the stem to bend towards the light
Plants use phototropism to maximise their exposure to sunlight for photosynthesis
Phototropism is a response to light stimuli
Light stimuli can be diurnal, seasonal, or disease related
Auxin plays a key role in phototropism
Plants use phototropism to maximize light capture for photosynthesis

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Description

This quiz explores the concept of phototropism, the process by which plants grow towards light. It covers the role of the hormone auxin in cell elongation and the importance of maximizing sunlight exposure for photosynthesis. Test your understanding of how plants respond to light stimuli and the mechanisms behind these growth patterns.