Tropisms and Hormones

Plants can respond quickly to stimuli, but most responses are slow and growth-based, known as tropisms. Key tropisms include phototropism, geotropism, and hydrotropism, which direct growth towards light, gravity, and water, respectively. Auxin, a plant hormone, plays a crucial role in these growth responses by accumulating on the shaded side of a plant, causing it to bend towards light. Understanding auxin's effects allows us to use it in rooting powders and to increase fruit yields, highlighting the importance of tropisms in plant survival.

What is the term used to describe plant responses to stimuli?

• Respiration

• Photosynthesis

• Tropisms

• Metabolism

Which of the following is NOT a type of tropism?

• Phototropism

• Geotropism

• Hydrotropism

• Thermotropism

In which direction do roots typically grow?

• Towards light

• Away from water

• Upwards against gravity

• Down into the soil

What is the primary role of auxin in plants?

• To control growth responses

• To conduct photosynthesis

• To provide energy

• To absorb water

How can humans benefit from understanding auxin's effects?

• By changing plant color

• By increasing plant metabolism

• By reducing plant size

• By enhancing root growth and fruit yields