Select an incorrect statement about algae?

Options

A. they ar simple , thalloid, and largely aquatic
B. they occur in a variety of habitats including wood
C. some of them also occur on animals e.g., on sloth bear
D. the form and size of algae is highly constant

Answer

To solve the question of selecting an incorrect statement about algae, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Characteristics of Algae**:
- Algae are simple, thalloid (non-flowering) organisms that are primarily aquatic. They can be found in various habitats, including freshwater, marine environments, moist stones, soil, and even on wood and animals.

2. **Analyze the Given Statements**:
- We need to evaluate each statement provided in the question to determine which one is incorrect.
- **Statement 1**: Algae are simple thalloid and largely aquatic. (True)
- **Statement 2**: They occur in a variety of habitats including wood. (True)
- **Statement 3**: Some of them also occur on animals. (True)
- **Statement 4**: The form and size of algae is highly constant. (False)

3. **Identify the Incorrect Statement**:
- Upon evaluating the statements, we find that the fourth statement is incorrect. Algae exhibit a wide range of forms and sizes, which can vary significantly. They can be unicellular, colonial, or multicellular, and their morphology can change based on environmental conditions.

4. **Conclusion**:
- The incorrect statement about algae is the one that claims "the form and size of algae is highly constant."

### Final Answer:
The incorrect statement about algae is: "The form and size of algae is highly constant."

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