Chlorophyll common between phaeophyceae and bacillariophyceae but absent in rhodophyceae is

Options

A. chlorophyll a
B. chlorophyll b
C. chlorophyll c
D. chlorophyll e

Answer

To solve the question regarding the type of chlorophyll that is common between Phaeophyceae (brown algae) and Bacillariophyceae (diatoms) but absent in Rhodophyceae (red algae), we can follow these steps:

### Step 1: Identify the Types of Algae
- **Phaeophyceae**: This group is commonly known as brown algae. They typically contain chlorophyll A and chlorophyll C.
- **Bacillariophyceae**: This group is known as diatoms. They also contain chlorophyll A and chlorophyll C.
- **Rhodophyceae**: This group is known as red algae. They primarily contain chlorophyll A and do not have chlorophyll C.

### Step 2: Analyze the Chlorophyll Types
- **Chlorophyll A**: Present in all three groups (Phaeophyceae, Bacillariophyceae, and Rhodophyceae).
- **Chlorophyll B**: Generally absent in both Phaeophyceae and Bacillariophyceae, and also absent in Rhodophyceae.
- **Chlorophyll C**: Present in both Phaeophyceae and Bacillariophyceae, but absent in Rhodophyceae.

### Step 3: Determine the Common Chlorophyll
From the analysis:
- Chlorophyll A is not the answer since it is present in Rhodophyceae.
- Chlorophyll B is not the answer since it is absent in all three groups.
- Chlorophyll C is the only type that is present in both Phaeophyceae and Bacillariophyceae while being absent in Rhodophyceae.

### Conclusion
The chlorophyll that is common between Phaeophyceae and Bacillariophyceae but absent in Rhodophyceae is **Chlorophyll C**.

---