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Tetrahymena
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Tetrahymena is a genus of free-living ciliates, examples of unicellular eukaryotes. The genus Tetrahymena is the most widely studied member of its phylum. It can produce, store and react with differen
Tetrahymena conjugation. When nutrients are scarce, two individuals (A) pair with each other and begin sexual reproduction (conjugation). (B) The diploid micronucleus in each individual undergoes meiosis to form four haploid nuclei, and three of these are degraded. (C) The remaining haploid nucleus divides mitotically to form two pronuclei in each cell. (D) One of the two pronuclei in each cell is exchanged with the mating partner, and fusion leads to the formation of the diploid
Tetrahymena conjugation. When nutrients are scarce, two individuals (A) pair with each other and begin sexual reproduction (conjugation). (B) The dipl
Two Tetrahymena cells of complementary mating types pair to exchange nuclei during sexual conjugation.
Two Tetrahymena cells of complementary mating types pair to exchange nuclei during sexual conjugation.
Unicellular organism
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A unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Organisms fall into two
Tetrahymena
…Tetrahymena is a genus of free-living ciliates, examples of unicellular eukaryotes. The genus Tetrahymena is the most widely studied member of its phylum. It can produce, store and react with different types of hormones…
Valonia ventricosa, a species of alga with a diameter that ranges typically from 1 to 4 centimetres (0.4 to 1.6 in), is among the largest unicellular
Valonia ventricosa, a species of alga with a diameter that ranges typically from 1 to 4 centimetres (0.4 to 1.6 in), is among the largest unicellular species
Modern stromatolites in Shark Bay, Western Australia. It can take a century for a stromatolite to grow 5 cm.
Modern stromatolites in Shark Bay, Western Australia. It can take a century for a stromatolite to grow 5 cm.
Bacteria in a capsule
Bacteria in a capsule
A bottom-dwelling community found deep in the European Arctic.
A bottom-dwelling community found deep in the European Arctic.