Many years ago

Many years ago - Protists are small but they are a...

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Protists are small but they are a replaceable part of our ecosystem. Protists are eukaryotes that are extremely diverse and they are most diverse with the way they obtain nutrients. Some protists are photoautotrophs and some are heterotrophs and some can perform a combination of both methods of getting food and they were called mixotrophs. Protists were often divided into three categories based on their mode of nutrient intake: algae, plant- like protists that are photosynthetic, protozoan , animal like protists that are ingestive, and no general name fungus like protists that are absorptive. Protists arose as a result of emdosymbiosis , a process in which certain unicellular organisms engulfed other cells, which became endosymbionts and ultimately organelles in the host cell. Endosymbiotic hypothesis proposed by scientist postulates that early eukaryotes probably engulfed a proteobacteria through phagocytosis and acquired mitochondria. The hypotheses is supported by DNA of plastid gens in red algae, and green algae which closely resembles the DNA of cyanobacteria . Many years ago, taxonomists grouped all the protists in one kingdom called the protists kingdom , however, advances in eukaryotic systematic showed that some protists are closely related to organisms from the plant kingdom, animal kingdom, and
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Many years ago - Protists are small but they are a...

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