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Paramecium caudatum [1] is a species of unicellular protist in the phylum Ciliophora. [2] They can reach 0.33 mm in length and are covered with minute hair-like organelles called cilia. [3] The cilia are used in locomotion and feeding. [2] The species is very common, and widespread in marine, brackish and freshwater environments. [4] [5]
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A diagram of Paramecium caudatum. Species of Paramecium range in size from 0.06 mm to 0.3 mm in length. Cells are typically ovoid, elongate, or foot- or cigar-shaped. The body of the cell is enclosed by a stiff but elastic structure called the pellicle.
Stages of conjugation Stages of conjugation in Paramecium caudatum. In Paramecium caudatum, the stages of conjugation are as follows (see diagram at right): Compatible mating strains meet and partly fuse; The micronuclei undergo meiosis, producing four haploid micronuclei per cell. Three of these micronuclei disintegrate. The fourth undergoes ...
The peniculids are an order of ciliate protozoa, including the well-known Paramecium and related genera, such as Frontonia, Stokesia, Urocentrum and Lembadion. Most are relatively large, freshwater forms that feed by sweeping smaller organisms into the mouth. They have weird life cycles, and in many cases do not even form resting cysts.
Class: Alphaproteobacteria. Subclass: Caulobacteridae. Order: ... The member Holospora is an intracellular parasite found in the unicellular protozoa Paramecium. [1]
Two species, S. caudatum and S. semivirescens, have missing information in the table due to the limited amount of research completed. Spirostomum caudatum is characterized mainly by its long thin tail, while Spirostomum semivirescens is identified by the presence of zoochlorellae (endosymbiotic algae) in its cytoplasm, providing its bright ...
Paramecium, specifically P. caudatum, is capable of learning to associate intense light with stimulus such as electric shocks in its swimming medium; although it appears to be unable to associate darkness with electric shocks. [15] Protozoan ciliate Tetrahymena has the capacity to 'memorize' the geometry of its swimming area. Cells that were ...