Which group of organisms possesses a protein rich layer called pellcle

Options

A. Chrysophytes
B. Euglenoids
C. Dinoflagellates
D. Slime Moulds.

Answer

To answer the question "Which group of organisms possesses a protein-rich layer called pellicle?", we can follow these steps:

### Step 1: Understand the term "pellicle"
- The term "pellicle" refers to a flexible, protein-rich layer that provides structural support and protection to certain unicellular organisms.

### Step 2: Analyze the options provided
- The question provides four options:
1. Chrysophytes
2. Euglenoids
3. Dinoflagellates
4. Slime molds

### Step 3: Evaluate each option
1. **Chrysophytes**:
- These are known as golden algae and have a silica-based cell wall, not a pellicle. Therefore, this option is incorrect.

2. **Euglenoids**:
- Organisms in this group, such as Euglena, possess a pellicle that is protein-rich. This makes this option a strong candidate for the correct answer.

3. **Dinoflagellates**:
- These organisms have two flagella and their cell covering is made of cellulose plates, not a pellicle. Thus, this option is incorrect.

4. **Slime molds**:
- Slime molds do not possess a pellicle as they are multicellular and do not have a defined cell wall. This option is also incorrect.

### Step 4: Conclusion
- After evaluating all options, the correct answer is **Euglenoids**, as they are the only group listed that possesses a protein-rich layer called pellicle.

### Final Answer
**Euglenoids** possess a protein-rich layer called pellicle.

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