Number of flagella in diatoms Dinoflagellates and euglenoids are

Options

A. 0, 2, 2
B. `1, 2, 2`
C. ` 2, 2, 1`
D. 1, 1, 1

Answer

To answer the question regarding the number of flagella in diatoms, dinoflagellates, and euglenoids, we can follow these steps:

### Step 1: Understand Diatoms
- Diatoms are a type of algae known as prisophytes.
- They are photosynthetic organisms found in both freshwater and marine environments.
- **Number of Flagella:** Diatoms have **1 flagellum**.

### Step 2: Understand Dinoflagellates
- Dinoflagellates are also photosynthetic protists.
- They are known for their unique swimming patterns and can be found in marine and freshwater environments.
- **Number of Flagella:** Dinoflagellates have **2 flagella**.

### Step 3: Understand Euglenoids
- Euglenoids are characterized by their ability to change shape and are known for their metabolic flexibility.
- They can swim or glide using their flagella.
- **Number of Flagella:** Euglenoids also have **2 flagella**.

### Step 4: Summarize the Findings
- Diatoms: 1 flagellum
- Dinoflagellates: 2 flagella
- Euglenoids: 2 flagella

### Final Answer
The number of flagella in diatoms, dinoflagellates, and euglenoids is **1, 2, 2** respectively.