Nassula protozoa conjugating, micrograph

Nassula protozoa conjugating, micrograph

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Credit: GERD GUENTHER/SCIENCE PHOTO LIBRARY

Caption: Nassula protozoa conjugating. Differential interference contrast micrograph of two Nassula ornata ciliate protozoa undergoing conjugation, a form of sexual reproduction. During conjugation the protozoa attach to each other, and gametes (sex cells) pass between them, combining to form offspring. Ingested blue-green algae (cyanobacteria) can be seen enclosed in food vacuoles (coloured circles) inside the protozoa. Magnification: x360 when printed 10 centimetres wide.

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Keywords: 1, alga, algal, animal, bacteria, bacterium, biological, biology, blue-green algae, cilia, ciliate, cilium, conjugating, conjugation, contrast, cyanobacteria, dic, differential interference, endosymbiont, exchange, exchanging, fauna, feeder, feeding, food vacuole, ingested, ingesting, internal structure, invertebrate, invertebrates, light micrograph, light microscope, lm, micro-organism, micro-organisms, microbiological, microbiology, microorganism, microorganisms, nassula ornata, nature, one, protozoa, protozoan, protozoans, reproducing, sexual reproduction, single, single-celled, symbiosis, symbiotic, unicellular, vacuoles, wildlife, zoological, zoology

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