Plant adaptation exercise - Free Printable

Let's solve the task step by step using the word bank provided:

Word Bank:

- water
- rainfall
- fibrous
- animals
- photosynthesis
- wide
- evaporation
- leaves
- roots

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Task 1: Complete the following statements

#### Stem
> The stem creates energy for the plant through photosynthesis.
> The thick stems store water.

✔ Explanation:
- Cactus stems are green and contain chlorophyll, so they can perform photosynthesis (the process of making food using sunlight).
- The thick stem acts as a reservoir to store water, which is crucial in dry desert environments.

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#### Spines
> These prevent animals from eating the plant.
> Cactus have spines instead of leaves, to reduce water lost through evaporation.

✔ Explanation:
- Spines are modified leaves that deter animals from eating the cactus.
- Instead of broad leaves (which lose water quickly), cacti have spines to minimize evaporation (loss of water from the plant).

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#### Roots
> Cactus plants have long roots. The fibrous roots spread far and wide to absorb water.
> They are close to the ground to absorb water immediately after any rainfall.

✔ Explanation:
- Cacti have a shallow but widespread root system called fibrous roots.
- These roots spread wide across the soil surface to capture water quickly after rainfall, which is rare in deserts.
- Being close to the surface allows them to absorb water before it evaporates.

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✔ Final Answer Key:

| Section | Completed Sentence |
|--------|--------------------|
| Stem | - The stem creates energy for the plant through photosynthesis.<br>- The thick stems store water. |
| Spines | - These prevent animals from eating the plant.<br>- Cactus have spines instead of leaves, to reduce water lost through evaporation. |
| Roots | - Cactus plants have long roots.<br>- The fibrous roots spread far and wide to absorb water.<br>- They are close to the ground to absorb water immediately after any rainfall. |

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🌵 Summary of Adaptations:

- Photosynthesis in stem: No need for large leaves.
- Water storage: Thick stem holds water.
- Spines: Protect from herbivores and reduce water loss.
- Fibrous, wide roots: Capture water quickly after rain.

This helps the cactus survive in harsh, dry desert conditions.