Exploring Plant Growth Responses and Tropisms

Plants can respond quickly to stimuli, but most responses are slow and controlled by growth. These growth responses, called tropisms, direct plants towards or away from stimuli like light, gravity, and water. Auxin, a plant hormone, plays a crucial role in these responses by accumulating on the shaded side of a plant, causing it to grow towards light. Understanding auxin's effects allows us to use it in rooting powders and to increase fruit yields. Tropisms are essential for plants to find optimal conditions for survival.

What are the movements of plants towards or away from stimuli known as?

• Phototropism

• Tropisms

• Geotropism

• Hydrotropism

Which type of tropism is the response to light?

• Phototropism

• None of the above

• Hydrotropism

• Geotropism

Which tropism describes growth in response to gravity?

• Phototropism

• Geotropism

• Hydrotropism

• None of the above

What hormone is responsible for controlling plant growth responses?

• Adrenaline

• Auxin

• Estrogen

• Insulin

How does auxin affect plant growth?

• It has no effect on growth direction.

• It accumulates more on the shaded side, promoting faster growth there.

• It promotes equal growth throughout the plant.

• It decreases growth on the shaded side of the stem.

What is a positive growth response in plants?

• Growth away from light

• Growth towards a stimulus

• Growth against gravity

• None of the above

What is the role of auxins in agriculture?

• To stimulate root growth on plant cuttings

• To reduce the size of fruits

• To inhibit the growth of weeds

• To decrease fruit yields

How do plants benefit from tropisms?

• By growing towards or away from stimuli to find optimal conditions

• None of the above

• By communicating with other plants

• By moving physically towards the best conditions