Protozoan sexual reproduction, SEM

Protozoan sexual reproduction, SEM

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Caption: Protozoan sexual reproduction. Coloured scanning electron micrograph (SEM) of two Paramecium caudatum protozoa reproducing sexually by a method called conjugation. Sexual reproduction involves mixing genetic material, as opposed to the cloning of the genetic material in asexual reproduction. These protozoa conjugate by forming a connection (not seen) through which they exchange genetic material. Paramecium protozoa can also reproduce asexually by binary fission. The filaments in the background are Oscillatoria sp. blue-green algae. P. caudatum are single-celled aquatic micro- organisms that feed on plant matter and bacteria. Magnification: x550 when printed 10cm wide.

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Keywords: alga, animal, animals, aquatic, blue-green algae, cavity, cilia, ciliate, coloured, conjugating, conjugation, freshwater, horizontal, invertebrate, invertebrates, mate, mating, mouth, nature, oral groove, oscillatoria sp., pair, paramecia, paramecium caudatum, protozoa, protozoan, reproducing, reproduction, reproductive, scanning electron micrograph, sem, sex, sexual, two, wildlife, zoology

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