All algae possess

Options

A. (a) chl a and b
B. (b) chl a,carotenes and phycobilin
C. (c) chl b and carotenes
D. (d) chl a and carotenoids

Answer

To solve the question "All algae possess," we need to identify the photosynthetic pigments that are universally found in all types of algae. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding Algae Classification**:
- Algae are classified into three main groups: green algae (Chlorophyta), brown algae (Phaeophyta), and red algae (Rhodophyta).

2. **Identifying Photosynthetic Pigments**:
- The primary photosynthetic pigments in algae include chlorophylls (A and B), carotenoids, and phycobilins.

3. **Analyzing Each Option**:
- **Option A: Chlorophyll A and B**:
- Chlorophyll A is present in all algae, but chlorophyll B is only found in green algae. Therefore, this option is incorrect.

- **Option B: Chlorophyll A, Carotenes, and Phycobilins**:
- Chlorophyll A is present in all algae, and carotenes (a type of carotenoid) are also found in all algae. However, phycobilins are only found in red algae. Thus, this option is also incorrect.

- **Option C: Chlorophyll B and Carotenes**:
- Chlorophyll B is only present in green algae, making this option incorrect as well.

- **Option D: Chlorophyll A and Carotenoids**:
- Both chlorophyll A and carotenoids (which include carotenes) are present in all three types of algae: green, brown, and red. Therefore, this option is correct.

4. **Conclusion**:
- The correct answer is **Option D: Chlorophyll A and Carotenoids**, as these pigments are found in all algae.

### Final Answer:
All algae possess **Chlorophyll A and Carotenoids**.