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27 August, 04:10

The first protists probably appeared around a. 1.5 million years ago b. 170 million years ago c. 1.5 billion years ago d. 5 billion years ago

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Answers (2)
  1. 27 August, 04:49
    0
    Option (C)

    Explanation:

    Protists are the kingdom that includes unicellular organisms. These organisms are eukaryotic in nature which means that it has a well-defined nucleus. They may be present in colonies or biofilm. But they re self-sufficient. Since the time of formation of these organisms, they have constantly undergone evolution forming a more complex type of organisms.

    The first protists appeared during the proterozoic age at about 1.8-1.5 billion years back.

    Hence the most appropriate answer is 1.5 billion years ago i. e option (C)
  2. 27 August, 06:04
    0
    1.5 billion years ago

    Explanation:

    Protists are a collection formed up of protozoa, unicellular algae, and fungus forms. We will focus on the being part of this society: the protozoa (proto = first, zoa = beings). Protozoa are the earliest discovered collection of heterotrophic living that utilize and modify complicated meal particles into power. Although protozoans are only made up of a single cell, these organisms control to perform all the necessary responsibilities of life. The protozoa are split into four principal associations: the ciliates, the flagellates, the heliozoans, and the amoebas.
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