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Common ciliated eucaryotic unicellular organisms widespread in freshwaters.
paramecium caudatum, unicellular, unicellular eukaryotes, Ciliatea, cell organelle, contractile vacuole, cilia, digestive vacuole, cilium, cytostome, freshwater, Ciliophora, animal, biology
Widespread heterotrophic unicellular organisms with constantly changing shapes
Unicellular eukaryotes living in freshwaters, capable of feeding autotrophically and heterotrophically.
Tardigrades can survive in extreme environments, they can even stay alive in outer space.
There are two basic cell types: prokaryotic and eukaryotic cells.
Eukaryotic cells contain a number of organelles.
Bacteria occur in a wide range of shapes, including spheres, rods and spirals.
Jellyfish are free-swimming marine animals, a species of Cnidaria, the most ancient group of Eumetazoans.
Eukaryotic cells with nuclei measuring only a few micrometres may contain nearly 2 metres of DNA, coiled multiple times.
Viruses consist of protein and DNA or RNA; they reprogram infected cells to produce more viruses.