Question

The algae commonly used as fertilizers are

• A. blue-freen algae
• B. diatoms
• C. staphylococcus
• D. none of these

Answer 1

The correct option is A

blue-freen algae

The correct option is A.

The reasoning for the correct option:

1. Blue-green algae take nitrogen from the air and convert it to ammonia, which is then used to fix nitrogen.
2. They're a natural part of freshwater ecosystems.
3. They are, in fact, an important aspect of a healthy body of water since they produce oxygen and provide food for some aquatic species.

The reason for the incorrect option:

Option B:

As basic dynamite, it's utilized in filters, insulation, and paints.

Option C:

Abscesses and wounds are treated using this

Final answer: Blue-green algae are a type of algae that is often used as a fertilizer.