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Question

All eukaryotic unicellular organisms belong to:


A

Monera

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B

Protista

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C

Fungi

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D

Bacteria

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Solution

The correct option is B

Protista


The correct option is B.

Explanation of correct option:

  1. All unicellular eukaryotes come under the kingdom Protista.
  2. Such organisms have well-defined nuclei and membrane-bound organelles.
  3. They reproduce asexually by cell fusion and sexually by zygote formation.
  4. They are primarily aquatic and microscopic.

Explanation of incorrect options:

Option A:

  1. Monera consists of prokaryotes.
  2. They are bacteria that are the most abundant microorganisms.

Option C:

  1. Multicellular eukaryotes which do not perform photosynthesis come under the kingdom Fungi.
  2. The only exception is yeast.

Option D:

  1. Bacteria come under the kingdom Monera.
  2. They occur everywhere and show the most extensive metabolic diversity.

Final answer: All unicellular eukaryotic organisms belong to Protista.


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