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Paramecium Conjugation - Positive
Over 75,000 individual species of paramecia have been recorded and all share certain common features. Constantly moving in search of food, a paramecium sweeps up its meals, mainly bacteria and other small organisms, with a series of cilia that line its oral groove and gullet. A single paramecium has three nuclei. A large, macronucleus is essential for its survival, while one or two smaller micronuclei are necessary for sexual reproduction. Reproduction is usually asexual by binary fission and can occur several times a day. Occasionally, two organisms will exchange nuclear material through conjugation, a form of sexual reproduction.