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Alga that is useful for prolonged space ...

Alga that is useful for prolonged space flight for liberation of oxygen, consumption of `CO_(2)`, disposal of wastes and formation of food is

A

Ulva

B

Caulerpa

C

Chlorella

D

Chlamydomonas.

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**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks for an alga that is beneficial for prolonged space flights due to its ability to liberate oxygen, consume carbon dioxide, dispose of waste, and form food. 2. **Identifying the Functions Required**: - **Liberation of Oxygen**: The alga should be capable of photosynthesis, which produces oxygen. - **Consumption of Carbon Dioxide**: The alga should absorb CO₂ during photosynthesis. - **Disposal of Wastes**: The alga should be able to treat or utilize nitrogenous wastes. - **Formation of Food**: The alga should be a source of nutrients, including amino acids, minerals, and vitamins. 3. **Evaluating the Options**: The options provided include various types of algae. We need to determine which one fits all the criteria mentioned. - **Chlorella**: This is a green alga known for its photosynthetic capabilities, making it a strong candidate as it can produce oxygen and consume CO₂. It is also known for its nutritional value. - **Ulva**: While it is edible, it does not specifically meet the requirements for space flight. - **Kaurava**: This is an invasive seaweed and does not fit the criteria. - **Chlamydomonas**: This is a green alga found in various environments but does not fulfill all the functions required for space travel. 4. **Conclusion**: Based on the evaluation, **Chlorella** is the alga that meets all the criteria for prolonged space flights. It can liberate oxygen, consume CO₂, dispose of waste, and serve as a food source. 5. **Final Answer**: The correct answer is **Chlorella**. ---
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