Question

Oscillatoria is an example of

• A. Blue green algae
• B. Brown algae
• C. Golden brown algae
• D. Green algae

Answer 1

The correct option is A

Blue green algae

The correct option is A.

Explanation of the correct option:

1. Oscillatoria is an example of blue green algae.
2. It is a filamentous algae, often found in freshwater habitats, hot springs, etc.
3. Oscillatoria performs oxygenic photosynthesis as it possesses photosynthetic pigment chlorophyll­-a.
4. Oscillatoria moves by oscillating back and forth and does not possess any flagellum for locomotion.
5. Blue green algae are prokaryotic, photosynthetic, Gram-negative bacteria.

Explanation of the incorrect option:

Option B:

Brown algae are found mainly in marine water and brackish water. These belong to the class Phaeophyceae, e.g. - Sargassum, Fucus, Laminaria, etc.

Option C:

Golden brown algae belong to the class Chrysophyceae, organisms are mainly found in freshwater. For e.g.- Prymnesium, Synura, etc.

Option D:

Green algae belong to the class Chlorophyceae. These are found in freshwater, marine water, brackish water, e.g.- Spirogyra, Volvox, Chara, etc.

Final Answer:

Oscillatoria is an example of blue green algae.