Euglena vs. Paramecium

Main Difference

The main difference between Euglena and Paramecium is that Euglena can either be a plant-like or animal-like organism, whereas Paramecium is only an animal-like organism.

Difference Between Euglena and Paramecium

Comparison Chart

Euglena vs. Paramecium

Euglena is considered as a unicellular, green, freshwater organism having a flagellum; on the other hand, paramecium is regarded as a unicellular, freshwater animal with a distinctive shoe-like shape. The structure of euglena can be animal-like or a plant-like; on the contrary, the structure of paramecium is only an animal-like.

Euglena consists of a chloroplast, while paramecium does not consist of its chloroplast; instead, it swallows green algae. Euglena takes particles of food; on the flip side, paramecium snatches food through predation. The feeding mechanism of euglena is that it either undergo photosynthesis or ingest food particles; on the other hand, the feeding mechanism of a paramecium is that it either undergoes photosynthesis or latches food through predation.

For propagation, euglena uses a flagellum; on the flip side, paramecium uses cilia for their propagation. Euglena is mainly sensitive to light and moves towards the sun, whereas paramecium is primarily sensitive to light, temperature, chemicals, and as well as touch. Only asexual reproduction occurs in euglena; on the flip side, paramecium goes through both sexual and asexual reproduction.

Euglena is known both a heterotroph and autotroph; on the contrary, paramecium is mainly a heterotroph. Euglena can survive through prolonged droughts without the availability of water or light, but in contrast, paramecium cannot escape through prolonged droughts and in unfavorable conditions.

The pellicle is present in euglena, which enhances their flexibility, while on the other hand, no pellicle is present in paramecium. Euglena consists of a tail that aids it in the swim, while paramecium does not have a tail.

What is Euglena?

Euglena is referred to as a green, freshwater organism, unicellular having a flagellum. Euglena mainly possesses characteristics of plants and animals. It resembles a plant because it also consists of the chloroplast. If the light and favorable conditions are available, then it also undergoes photosynthesis.

The chloroplast present in euglena is scattered throughout in its cell. Euglena consists of pyrenoids, which are considered microcompartments present inside the chloroplast, function in operating carbon-concentrating mechanisms.

The food in euglena is stored in the form of starch granules. Animal-like characteristics are also present in euglena. Euglena consists of an eyespot that is present for the detection of light.

A cell wall is not present in euglena; preferably, it consists of a pellicle. The pellicle is mainly made up of a protein layer, which is typically arranged around the cells of the euglena. Microtubules are responsible for holding the pellicle. The sliding of the pellicle strips offers and enhances flexibility and contractility to euglena.

The sliding process of the pellicle is known as metaboly. The gullet present in euglena serves as a reservoir of food. For the locomotion of euglena, it consists of a flagellum. Euglena also consists of the contractile vacuole, which is known as myoneme, which also assists in the movement of euglena, as well as this contractile vacuole is also involved in osmoregulation and the excretion of waste material.

What is Paramecium?

Paramecium is referred to as freshwater, unicellular, having the characteristics of animals. It looks like the sole of the shoe in its appearance. 0.3 mm is the approximate length of the paramecium. Paramecium is considered the scientific, generic name, and as well as it is used as the common name.

Paramecium consists of cilia, and its outer surface is covered with cilia. Cilia plays a vital role in the locomotion of the paramecium. When cilia beat toward backward, the forward movement of a paramecium is achieved, and when cilia beat toward a forward direction, the paramecium moves backward.

Inside the cell of the paramecium, a small micronucleus and a large micronucleus can be identified. The oval groove is present on one side of the paramecium. The oval slot forms a gullet and ends up with a cytostome.

The cilia of paramecium are also involved in feeding through passing the food directly into the gullet. Paramecium gets food through predation and sometimes through photosynthesis as it swallows the green algae. The ingested food is typically digested in the vacuole, and then the waste materials are excreted out through the anal pore of the paramecium.

Under favorable conditions, paramecium reproduces through asexual reproduction by the process of binary fission. Paramecium reproduces through sexual reproduction by the process of conjugation under unfavorable conditions. Paramecium is primarily sensitive to the changes that occur in the environment, for example, light, temperature, chemicals, and as well as touch.

Conclusion

The above discussion concludes that the euglena consists of chloroplasts and undergo photosynthesis. However, they ingest food particles as well, while paramecium does not include chloroplasts, but it swallows green algae, and they get food through predation.