Which of the following statement is incorrect?

Options

A. Most of the englenoids live in running fresh water while Dinoflagellates mostly marine.
B. Euglenoids carry same pigments as that of higher plant
C. Amoeboid protozoans live in fresh water.sea water or moist soil
D. Marine amoeboids have silica shells on their surface

Answer

To determine which statement is incorrect, we will analyze each of the four statements provided in the question.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The statement claims that "most of the euglenoids live in running fresh water while dinoflagellates mostly reign in marine environments."
- **Euglenoids** are primarily found in **stagnant** freshwater environments, not running water. Therefore, this part of the statement is incorrect.
- **Dinoflagellates** are indeed mostly found in marine environments, which is correct.
- **Conclusion:** This statement is incorrect due to the misrepresentation of euglenoids' habitat.

2. **Analyze the Second Statement:**
- The statement claims that "Euglenoids carry the same pigments as that of higher plants."
- Euglenoids contain chlorophyll a and b, similar to higher plants, allowing them to perform photosynthesis.
- **Conclusion:** This statement is correct.

3. **Analyze the Third Statement:**
- The statement claims that "Euglenoids behave like phototrophs in the presence of sunlight and like heterotrophs in the absence of sunlight."
- This is true as euglenoids can photosynthesize when light is available but can also absorb organic nutrients when light is not present.
- **Conclusion:** This statement is correct.

4. **Analyze the Fourth Statement:**
- The statement claims that "Amoeboid protozoans live in freshwater, seawater, and moist soil."
- This is accurate as amoeboid protozoans can be found in various habitats, including freshwater, marine environments, and moist terrestrial environments.
- **Conclusion:** This statement is correct.

5. **Analyze the Fifth Statement:**
- The statement claims that "Marine amoeboids have silica cells on their surface."
- This is also correct as certain marine amoeboid protozoans, such as diatoms, have silica-based cell walls.
- **Conclusion:** This statement is correct.

### Final Conclusion:
The incorrect statement is the **first statement**, which inaccurately describes the habitat of euglenoids.

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