Finally, Amoeba moved with a pseudopod, and so is a sarcodine see Fig. All three protists had a nucleus, as expected, but the Paramecium had two nuclei, a micronucleus and a macronucleus. The Paramecium and Amoeba both had food and contractile vacuoles, but these were lacking in the Euglena.
All protists had animal-like characteristics in terms of their movements and feeding patterns. Of the three, Euglena was the only one that had chloroplasts, an organelle common in plants.
Protists seem to share certain characteristics even when they are classified into different groups. Their organelles are a mixture of animal and plant structures, but they all have nuclei, a feature which distinguishes Protists from other unicellular organisms.
This motion was very clear under the light microscope, but interactions of protists with others in the culture jar were better observed using the dissection scope. The Amoeba moves by extending part of its cell. This extruding part is the pseudopod, and allows the Amoeba to drag itself from one place to another see Fig. Its movement is slow, and changing directions is just a matter of extending a pseudopod in a new direction.
Amoebas do not seem to have a particular shape, with the exception of the pseudopodia that consistently protrude from the cell. Paramecia are smaller than Amoebas. They move with the help of microscopic hair-like structures called cilia, which act like oars to push them through the water. They swim by rotating slowly and changing directions often. If the Paramecium comes upon an obstacle, it stops, swims backwards, and then angles itself forward on a slightly different course.
Cilia help the Paramecium move as well as feed. When the Paramecia feed, it does so by drawing its food into a funnel-shaped opening called the oral groove that is lined with cilia see Fig. The oral groove is like a mouth, taking food in with the help of cilia, which direct and move the food inward.
The Euglena moves rapidly, using its flagellum to propel itself through the water rather quickly, shifting directions with whip-like movements.
Unlike the Amoeba and the Paramecium , the Euglena has plant-like characteristics. The organelle that gives it this plant-like quality is the chloroplast see Fig. Since it can undergo photosynthesis, Euglena is able to make its own food just like plants. The three protists examined in this lab are examples of protists that use specialized structures for locomotion. The length of a Paramecium can be about 0. The outer surface of the Paramecium consists of cilia.
Cilia are important for locomotion. The forward movement is achieved by the backward beats of cilia, and the backward movement is achieved by the forward beats of cilia. A large macronucleus and a micronucleus can be identified inside the Paramecium cell. The oral groove is located on one side of the organism. It forms the gullet and ends up with a cytostome. The cilia are also involved in feeding by moving food into the gullet. The structure of the body of a Paramecium is shown in figure 2.
Figure 2: Paramecium Structure. The ingested food is digested inside a vacuole, and the wastes are eliminated through the anal pore. Paramecium asexually reproduces by binary fission under favorable conditions.
Under unfavorable conditions, Paramecium reproduces sexually by conjugation. Paramecium is also sensitive to changes in the environment such as temperature, light, chemicals, as well as touch.
Both Euglena and Paramecium are eukaryotic, microorganisms which belong to the kingdom Protista. Euglena: Euglena refers to a green, unicellular, freshwater organism with a flagellum. Paramecium: Paramecium refers to a unicellular, freshwater animal with a characteristic slipper-like shape. Euglena: Euglena can be either animal-like or plant-like organism.
Paramecium: Paramecium is an animal-like organism. Euglena: Euglena contain chloroplasts. Paramecium: Paramecium does not contain its own chloroplasts. Euglena: Euglena ingests food particles. Paramecium: Paramecium catches food by predation.
Euglena: Euglena either undergo photosynthesis or ingest food particles. Euglenoids are unicellular flagellate protists commonly found in freshwater ponds, pools and moist mud. The key difference between amoeba and paramecium is that the amoeba moves using pseudopodia while the paramecium moves using cilia. Amoeba and paramecium are two very important unicellular eukaryotes. They are protozoans belonging to kingdom Protista.
They live in aquatic environments, and they are heterotrophs. Answer: Complexity of paramecium over amoeba. Amoeba has no definite shape,moves by pseudopodia and must capture its food with cytoplasmic projections. Paramecium contain a pellice that gives it a more defined shape. It possesses cilia for movement,nuclei and a well defined mouth pore for food to enter. But in others, the parasite attacks the gut itself and can cause potentially fatal diarrhea, intestinal ulcers, and liver abscesses.
This illness, called amebiasis, is a leading cause of parasitic death among humans. Skip to content Technology.
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