Euglena

Euglena is a single-celled organism that belongs to the protist kingdom. It is a unicellular organism that can be found in freshwater, saltwater, and moist soils. Euglena has some unique characteristics that set it apart from other single-celled organisms.

Three Flagella

Euglena has three flagella, which are long, whip-like appendages that help it move through its environment. Two of the flagella are located at the front of the organism, while one is located at the back. The flagella move in a coordinated manner, allowing Euglena to swim through water and move towards sources of light.

Autotroph

Euglena is primarily an autotroph, meaning that it can produce its own food through photosynthesis. It contains chloroplasts, which are the same structures that plants use to carry out photosynthesis. Euglena can use sunlight to produce energy and convert carbon dioxide into organic compounds, just like plants.

Heterotroph

However, Euglena can also behave as a heterotroph, meaning it can consume other organisms for energy. When sunlight is not available, Euglena can switch to a heterotrophic mode and feed on other microorganisms in its environment.

Conclusion

In conclusion, Euglena is a unique organism that has both autotrophic and heterotrophic capabilities. It is able to produce its own food through photosynthesis but can also consume other organisms for energy when necessary. Euglena's three flagella allow it to move through water and towards sources of light.

Euglena is generally autotropic but becomes heterotropic in unfavourable condition. But it do not contain 3 flagella. So no option is correct.