Question

An alga which can be employed as food for human being is :

• A. Chlorella
• B. Spirogyra
• C. Polysiphonia
• D. Ulothrix

Answer 1

The Correct Option is A

To determine which alga can be used as food for humans, we should consider the nutritional and edible qualities of the given options.

1. Chlorella: Chlorella is a genus of single-celled green algae that is rich in various nutrients such as proteins, vitamins, and minerals. It is known for its high chlorophyll content and is widely consumed as a dietary supplement. Thus, it is considered safe and beneficial for human consumption.
2. Spirogyra: Spirogyra is a filamentous green algae. Though it is an interesting organism to study for its spiral chloroplasts, it is not commonly used as food for humans.
3. Polysiphonia: Polysiphonia is a genus of red algae. While some red algae are edible (such as Nori), Polysiphonia is not typically used as a food source.
4. Ulothrix: Ulothrix is another genus of filamentous green algae. It is not known for being used as food for humans.

Based on the edible qualities and nutritional benefits, Chlorella is the alga that can be employed as food for human beings. This is because of its high protein content and presence of vitamins and minerals, making it a supplement in human diets.

Conclusion: The correct answer is Chlorella.