Phototropism: Plant growing toward light.
A young plant growing upright in a pot, responding to a light source from the side.
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Show Answer Key & Explanations
Step-by-step solution for: Worksheet 2 (Plant Movement) | PDF | Plant Physiology | Branches ...
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Show Answer Key & Explanations
Step-by-step solution for: Worksheet 2 (Plant Movement) | PDF | Plant Physiology | Branches ...
To solve the problem, we need to identify the type of plant movement (tropism) depicted in each image and describe it. Tropisms are directional movements of plants in response to external stimuli. Here is the analysis for each image:
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- Description: The plant is growing upward toward a light source.
- Type of Movement: Phototropism
- Explanation: Phototropism is the growth of a plant toward or away from a light source. In this case, the plant is moving upward toward the light, which is a positive phototropism.
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- Description: The plant's stem is bending toward a light source.
- Type of Movement: Phototropism
- Explanation: Similar to the first image, this is also phototropism. The stem is bending toward the light source, indicating a positive phototropic response.
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- Description: The plant's tendrils are wrapping around a support structure.
- Type of Movement: Thigmotropism
- Explanation: Thigmotropism is the growth of a plant part in response to touch or contact with a solid object. Here, the tendrils are curling around the support, showing a thigmotropic response.
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- Description: The roots are growing downward into the soil.
- Type of Movement: Gravitropism
- Explanation: Gravitropism is the growth of a plant part in response to gravity. Roots typically grow downward due to positive gravitropism, while stems grow upward due to negative gravitropism. In this image, the roots are growing downward, indicating positive gravitropism.
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- Description: The plant is leaning toward a light source coming from the window.
- Type of Movement: Phototropism
- Explanation: This is another example of phototropism. The plant is bending toward the light source coming from the window, demonstrating a positive phototropic response.
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| Plant's Movement | Type of Movement |
|-------------------------------------------------------|--------------------|
| Image 1: Plant growing upward toward light | Phototropism |
| Image 2: Stem bending toward light | Phototropism |
| Image 3: Tendrils wrapping around a support | Thigmotropism |
| Image 4: Roots growing downward into soil | Gravitropism |
| Image 5: Plant leaning toward light from the window | Phototropism |
Boxed Final Answer:
\[
\boxed{
\begin{array}{|c|c|}
\hline
\text{Plant's Movement} & \text{Type of Movement} \\
\hline
\text{Image 1: Plant growing upward toward light} & \text{Phototropism} \\
\hline
\text{Image 2: Stem bending toward light} & \text{Phototropism} \\
\hline
\text{Image 3: Tendrils wrapping around a support} & \text{Thigmotropism} \\
\hline
\text{Image 4: Roots growing downward into soil} & \text{Gravitropism} \\
\hline
\text{Image 5: Plant leaning toward light from the window} & \text{Phototropism} \\
\hline
\end{array}
}
\]
---
Image 1:
- Description: The plant is growing upward toward a light source.
- Type of Movement: Phototropism
- Explanation: Phototropism is the growth of a plant toward or away from a light source. In this case, the plant is moving upward toward the light, which is a positive phototropism.
---
Image 2:
- Description: The plant's stem is bending toward a light source.
- Type of Movement: Phototropism
- Explanation: Similar to the first image, this is also phototropism. The stem is bending toward the light source, indicating a positive phototropic response.
---
Image 3:
- Description: The plant's tendrils are wrapping around a support structure.
- Type of Movement: Thigmotropism
- Explanation: Thigmotropism is the growth of a plant part in response to touch or contact with a solid object. Here, the tendrils are curling around the support, showing a thigmotropic response.
---
Image 4:
- Description: The roots are growing downward into the soil.
- Type of Movement: Gravitropism
- Explanation: Gravitropism is the growth of a plant part in response to gravity. Roots typically grow downward due to positive gravitropism, while stems grow upward due to negative gravitropism. In this image, the roots are growing downward, indicating positive gravitropism.
---
Image 5:
- Description: The plant is leaning toward a light source coming from the window.
- Type of Movement: Phototropism
- Explanation: This is another example of phototropism. The plant is bending toward the light source coming from the window, demonstrating a positive phototropic response.
---
Final Answer:
| Plant's Movement | Type of Movement |
|-------------------------------------------------------|--------------------|
| Image 1: Plant growing upward toward light | Phototropism |
| Image 2: Stem bending toward light | Phototropism |
| Image 3: Tendrils wrapping around a support | Thigmotropism |
| Image 4: Roots growing downward into soil | Gravitropism |
| Image 5: Plant leaning toward light from the window | Phototropism |
Boxed Final Answer:
\[
\boxed{
\begin{array}{|c|c|}
\hline
\text{Plant's Movement} & \text{Type of Movement} \\
\hline
\text{Image 1: Plant growing upward toward light} & \text{Phototropism} \\
\hline
\text{Image 2: Stem bending toward light} & \text{Phototropism} \\
\hline
\text{Image 3: Tendrils wrapping around a support} & \text{Thigmotropism} \\
\hline
\text{Image 4: Roots growing downward into soil} & \text{Gravitropism} \\
\hline
\text{Image 5: Plant leaning toward light from the window} & \text{Phototropism} \\
\hline
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of tropism worksheet.
