Tropism and Plant Hormones

What is phototropism?

• Phototropism is the growth movement of plants in response to light.

• Phototropism is the reaction of plants to gravity.

• Phototropism is the movement of animals in response to light.

• Phototropism is the process of photosynthesis in plants.

Explain how geotropism influences plant growth.

• Geotropism leads to plants growing underground

• Geotropism causes plants to grow sideways

• Geotropism has no impact on plant growth

• Geotropism influences plant growth by guiding roots downwards towards nutrients and stems upwards towards sunlight.

How does thigmotropism affect plant movement?

• Thigmotropism affects plant movement by attracting insects.

• Thigmotropism affects plant movement by changing the color of the leaves.

• Thigmotropism affects plant movement by causing the plant to produce a strong scent.

• Thigmotropism affects plant movement by triggering growth towards or away from the touching object, allowing the plant to adapt to its environment.

What are auxins and how do they function in plants?

• Auxins are plant hormones that regulate growth processes in plants.

• Auxins are enzymes that break down plant cell walls.

• Auxins are minerals that provide structural support to plants.

• Auxins are animal hormones that regulate growth processes in plants.

Describe the role of gibberellins in plant growth.

• Gibberellins inhibit seed germination and flowering by suppressing cell division

• Gibberellins have no effect on plant growth

• Gibberellins cause root growth to cease in plants

• Gibberellins promote stem elongation, seed germination, and flowering by stimulating cell division and elongation.

What is the primary stimulus for phototropism?

• Sound

• Gravity

• Temperature

• Light

How do auxins promote cell elongation in plants?

• By reducing the water content in the cell

• By promoting cell division instead of elongation

• By increasing the plasticity of the cell wall

• By inhibiting the synthesis of cellulose

Discuss the significance of geotropism in root development.

• Roots grow upwards due to geotropism

• Geotropism has no impact on root development

• Geotropism only affects stem development

• Geotropism plays a crucial role in root development by aiding in anchoring the plant, accessing water and nutrients efficiently, and establishing a stable foundation for growth.

What is the relationship between thigmotropism and plant support structures?

• Thigmotropism is only related to plant growth, not support structures.

• Plant support structures inhibit thigmotropism in plants.

• Thigmotropism has no effect on plant support structures.

• Thigmotropism influences how plants interact with and utilize plant support structures.

How do gibberellins influence seed germination?

• Gibberellins delay the synthesis of hydrolytic enzymes that degrade stored food in the endosperm, slowing down seed germination.

• Gibberellins promote the synthesis of hydrolytic enzymes that degrade stored food in the endosperm, aiding seed germination.

• Gibberellins inhibit the synthesis of hydrolytic enzymes that degrade stored food in the endosperm, hindering seed germination.

• Gibberellins have no effect on seed germination.