Which one manufactures food through photosynthesis

Options

A. Euglena
B. Chlamydomonas
C. Penicillium
D. Both A and B.

Answer

**Step-by-Step Text Solution:**

1. **Understanding Photosynthesis**:
- Photosynthesis is the process by which certain organisms, known as autotrophs, manufacture their own food by converting light energy (usually from the sun) into chemical energy in the form of glucose. This process primarily occurs in plants, algae, and some bacteria.

2. **Identifying the Organisms**:
- The question provides four options: Euglena, Chlamydomonas, Penicillium, and both A and B. We need to evaluate which of these organisms can perform photosynthesis.

3. **Analyzing Euglena**:
- Euglena is a unicellular organism that possesses characteristics of both plants and animals. It contains chlorophyll and can perform photosynthesis during the day, making it an autotroph. However, it can also switch to a heterotrophic mode of nutrition at night when light is not available.

4. **Analyzing Chlamydomonas**:
- Chlamydomonas is a green alga that is well-known for its photosynthetic capabilities. It contains chlorophyll a, chlorophyll b, and carotenoids, which are essential for capturing light energy for photosynthesis. Therefore, Chlamydomonas is also an autotroph.

5. **Analyzing Penicillium**:
- Penicillium is a type of mold and falls under the category of fungi. Fungi are heterotrophic organisms, meaning they cannot perform photosynthesis and do not manufacture their own food. They obtain nutrients by decomposing organic matter.

6. **Conclusion**:
- Since both Euglena and Chlamydomonas can perform photosynthesis, the correct answer to the question "Which one manufactures food through photosynthesis?" is option D: both A (Euglena) and B (Chlamydomonas).

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