Which one of the following categories of organisms do not evolve oxygen during Photosynthesis

Options

A. Photosynthetic red algae
B. Photsynthetic green aglae
C. Photosynthetic green algae
D. Photosynthetic bacteria

Answer

To answer the question "Which one of the following categories of organisms do not evolve oxygen during photosynthesis?", we can follow these steps:

### Step 1: Understand Photosynthesis
Photosynthesis is a process where organisms convert light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen.

### Step 2: Identify Organisms that Perform Photosynthesis
The organisms that perform photosynthesis include:
- **Cyanobacteria**: These are photosynthetic bacteria that do release oxygen.
- **Algae**: These are eukaryotic organisms that also release oxygen during photosynthesis.
- **Autotrophic Plants**: These are higher plants that perform photosynthesis and release oxygen.

### Step 3: Examine Photosynthetic Bacteria
There are specific types of bacteria known as **photosynthetic bacteria** (or photoautotrophic bacteria). These bacteria perform photosynthesis but do not release oxygen. This is because they do not utilize water in their photosynthetic process.

### Step 4: Conclusion
Among the categories mentioned, **photosynthetic bacteria** do not evolve oxygen during photosynthesis because they do not use water, which is essential for the liberation of oxygen.

### Final Answer
The category of organisms that do not evolve oxygen during photosynthesis is **photosynthetic bacteria**.

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