Plant Adaptations Quiz: How Plants Respond To Light

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| Attempts: 4,206 | Questions: 8 | Updated: Oct 28, 2025
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1. Tropism in which a plant responds to the stimulus of gravity.

Explanation

Root word for Gravitropism is "GRAVIT" for gravity. Plants roots grow downwards with Earth's gravity.

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About This Quiz
Plant Adaptations Quiz: How Plants Respond To Light - Quiz

This quiz will test your knowledge and understanding of plant responses and adaptations. Specifically, it will allow you to demonstrate your understanding of phototropism, gravitropism, hydrotropism and thigmotropism.

2. When a plant responds to touch such as a grape vine wrapping around a branch.

Explanation

Thigmotropism is the correct answer because it refers to the plant's response to touch or physical contact. In this case, when a grape vine wraps around a branch, it is exhibiting thigmotropic behavior. Thigmotropism allows the plant to sense and respond to mechanical stimuli, helping it to grow and support itself by clinging to other structures.

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3. A tropism in which a plant "bends" towards the sun throughout the day.


Explanation

Phototropism "PHOTO" meaning light as in sunlight.

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4. A tropism where a plant responds to the stimulus of water by growing or bending towards it.

Explanation

Hydrotropism - Root word is HYDRO meaning water.

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5. An action that causes a response.

Explanation

A stimulus is an action that causes another organism to respond.

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6. What is the name of the chemical that causes uneven growth in plants making them bend?

Explanation

Dutch scientist Fritz Went discovered auxins.

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7. This is the changes an organism makes to survive in its environment.

Explanation

Adaptation refers to the changes that an organism undergoes in order to survive in its environment. These changes can be physical, physiological, or behavioral, and they enable the organism to better cope with the challenges and demands of its surroundings. Adaptations can occur over generations through the process of natural selection, where individuals with beneficial traits are more likely to survive and reproduce. By adapting to their environment, organisms increase their chances of survival and reproductive success, ultimately ensuring the continuation of their species.

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8. A reaction from an organism as a result of a stimulus.

Explanation

An example is the camera flash is the stimulus and a person blinking their eyes is a response.

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Tropism in which a plant responds to the stimulus of gravity.
When a plant responds to touch such as a grape vine wrapping around a...
A tropism in which a plant "bends" towards the sun throughout the day.
A tropism where a plant responds to the stimulus of water by growing...
An action that causes a response.
What is the name of the chemical that causes uneven growth in plants...
This is the changes an organism makes to survive in its environment.
A reaction from an organism as a result of a stimulus.
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