Photosynthesis in green algae and bacteria is, respectively
(a) Oxygenic and anoxygenic
(b) Anoxygenic and oxygenic
(c) Oxygenic in both
(d) Anoxygenic in both

Options

A. Oxygenic and anoxygenic
B. Anoxygenic and oxygenic
C. Oxygenic in both
D. Anoxygenic in both

Answer

To determine the correct answer to the question about the type of photosynthesis in green algae and bacteria, we can break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Photosynthesis**:
- Photosynthesis is the process by which organisms convert light energy into chemical energy, primarily in the form of glucose. This process can be categorized into two types based on whether oxygen is produced as a by-product.

2. **Photosynthesis in Green Algae**:
- Green algae contain chlorophyll and perform photosynthesis that releases oxygen. This type of photosynthesis is known as **oxygenic photosynthesis**. In this process, water is used as an electron donor, and oxygen is released as a by-product.

3. **Photosynthesis in Bacteria**:
- Certain bacteria, such as purple and green sulfur bacteria, perform photosynthesis without releasing oxygen. This process is referred to as **anoxygenic photosynthesis**. Instead of water, these bacteria may use other substances (like hydrogen sulfide) as electron donors, which do not produce oxygen.

4. **Conclusion**:
- Given that green algae perform oxygenic photosynthesis and bacteria perform anoxygenic photosynthesis, the correct answer to the question is:
- **(a) Oxygenic and anoxygenic**.

### Final Answer:
(a) Oxygenic and anoxygenic

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