Question

Green algae associated with oxidation tanks are

• A. Spirogyra and Zygnema
• B. Pediastrum and Scenedesmus
• C. Chlorella and Chlamydomonas
• D. Both B and C

Answer 1

The correct option is A Spirogyra and Zygnema

Green algae associated with oxidation tanks are Spirogyra and Zygnema. Spirogyra are commonly found in freshwater habitats, developing slimy filamentous green masses. In oxidation tanks, there is enough sunlight and warmth they produce large amounts of oxygen, adhering as bubbles between tangled filaments. Similarly, Zygnema is a genus of freshwater filamentous thalloid algae. Zygnema grows as a free-floating mass of filaments, although young plants maybe found anchored to streambeds with a holdfast.

So, option A is the correct option.