Which of the following are called Whirling whips

Options

A. Desmids
B. Dinoflagellates
C. Nitzschia
D. 2 and 3

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Whirling Whips":**
- The term "whirling whips" refers to organisms that possess long and slender flagella which enable them to move in a unique manner.

2. **Identifying the Characteristics of Whirling Whips:**
- Whirling whips are characterized by having two flagella that are used for movement. These flagella are positioned strategically to allow for a specific type of propulsion.

3. **Movement Mechanism:**
- The movement of these organisms is different from typical flagellar movement. The two flagella work together to create a whirling or spinning motion, which propels the organism forward.

4. **Identifying the Organisms:**
- Among the options provided:
- Death myths (decimates) do not have flagella.
- Dinoflagellates are known for having two flagella and exhibit the whirling whip movement.
- Nestia is not commonly associated with this term.
- The option "both the option 2 and 3" is incorrect since only dinoflagellates exhibit the whirling whip characteristic.

5. **Conclusion:**
- Based on the characteristics and the movement mechanism, the correct answer is that dinoflagellates are referred to as "whirling whips."

**Final Answer: Dinoflagellates are called Whirling Whips.**

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