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Cell division of Oxytricha protozoa, light micrograph
Oxytricha cell division, darkfield light micrograph. Two Oxytricha sp. ciliate protozoa in conjugation. Conjugation results in genetic recombination and nuclear reorganization within the cell. During conjugation, two ciliates of a compatible mating type come together and a bridge forms between their cytoplasms. Their respective micronuclei undergo meiosis and haploid micronuclei are exchanged over the bridge. Following conjugation, the cells separate. Conjugation is a sexual phenomenon, not directly resulting in increase of numbers., Photo by LAGUNA DESIGN/SCIENCE PHOTO LIBRARY
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