Which of the following is mismatched ?

Options

A. Diatoms Silica shell, boxlike, golden brown
B. Euglenoids—flagella, pellicle, eye spot
C. Paramecium-cilia, calcium carbonate shell, gullet
D. Foraminifera–test, pseudopod, digestive vacuole

Explanation

To determine which of the statements is mismatched, we will analyze each option one by one:

1. **Diatoms**: The statement claims that diatoms have a silica cell wall and are box-like in shape. This is correct. Diatoms are known for their unique silica cell walls, which contribute to their structural integrity and are indeed box-like in appearance.

2. **Euglenoids**: The statement mentions that euglenoids have flagella, a pellicle, and an eye spot. This is also true. Euglenoids are characterized by their flagella for movement, a flexible pellicle for shape maintenance, and an eye spot that helps them detect light.

3. **Paramecium**: The statement claims that Paramecium has a calcium carbonate shell. This is incorrect. Paramecium does not have a calcium carbonate shell; instead, it has a pellicle and cilia for movement. Therefore, this statement is mismatched.

4. **Foraminifera**: The statement describes foraminifera as having a test, pseudopore, and digestive vacuole. This is accurate. Foraminifera are known for their calcareous tests (shells) and pseudopores that help in feeding.

After analyzing all the statements, we conclude that the mismatched statement is about Paramecium.

**Final Answer**: Statement C is mismatched: Paramecium does not have a calcium carbonate shell.