Answer
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Hint: It is found in two forms free-living and parasitic. They belong to the kingdom Protista. They are unicellular. They use cilia or pseudopodia for their movement.
Complete Answer:
Amoeba is a part of the Sarcodina phylum. They can form any shape they want because its membrane is flexible and it can shift its cytoplasm around to change its form. The word amoeba implies a transition. Using thin hair-like structures on its surface called cilia by which Paramecium used to move. The paramecium belongs to the phylum Ciliophora, a whole group of protists that travel using cilia.
Now, let us find the solution from the options-
- In general, species that are single-celled swim in the water or parasites are called protozoa. They belong to the Protista kingdom and are categorised depending on how they move into distinct phyla. Fingers such as pseudopodia, hair-like cilia, whip-like flagella, are locomotory organs. Pseudopodia are seen in Amoeba and cilia are present in paramecium.
- The lowest multicellular animals associated with the Animalia Kingdom are the Phylum Porifera. Therefore, the option B is incorrect.
- Algae are either multicellular or unicellular organisms. They are photosynthetic organisms. Therefore, the option C is incorrect.
- Bacteria are single-celled species belonging to the prokaryotic group, where a few organelles and a true nucleus are absent from the species. Therefore, the option D is incorrect.
Thus, the correct answer is option (A) Protozoa.
Note: Such short-lived cytoplasm external projections provide grip to amoebae to surface and move themselves forward. Pseudopodia may also be used by amoebae to feed. By using cilia, the Paramecium will travel forward and backward. The cilia move strongly from anterior to posterior when going forward. Similarly, cilia move strongly from posterior to anterior for backward movement. Not all the cilia travel at a time. At the same moment, the cilia of the transverse row move.
Complete Answer:
Amoeba is a part of the Sarcodina phylum. They can form any shape they want because its membrane is flexible and it can shift its cytoplasm around to change its form. The word amoeba implies a transition. Using thin hair-like structures on its surface called cilia by which Paramecium used to move. The paramecium belongs to the phylum Ciliophora, a whole group of protists that travel using cilia.
Now, let us find the solution from the options-
- In general, species that are single-celled swim in the water or parasites are called protozoa. They belong to the Protista kingdom and are categorised depending on how they move into distinct phyla. Fingers such as pseudopodia, hair-like cilia, whip-like flagella, are locomotory organs. Pseudopodia are seen in Amoeba and cilia are present in paramecium.
- The lowest multicellular animals associated with the Animalia Kingdom are the Phylum Porifera. Therefore, the option B is incorrect.
- Algae are either multicellular or unicellular organisms. They are photosynthetic organisms. Therefore, the option C is incorrect.
- Bacteria are single-celled species belonging to the prokaryotic group, where a few organelles and a true nucleus are absent from the species. Therefore, the option D is incorrect.
Thus, the correct answer is option (A) Protozoa.
Note: Such short-lived cytoplasm external projections provide grip to amoebae to surface and move themselves forward. Pseudopodia may also be used by amoebae to feed. By using cilia, the Paramecium will travel forward and backward. The cilia move strongly from anterior to posterior when going forward. Similarly, cilia move strongly from posterior to anterior for backward movement. Not all the cilia travel at a time. At the same moment, the cilia of the transverse row move.
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