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What are the main characteristics of kingdom protoctista.

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  1. They are said to be eukaryotic since their nucleus is bound by a membrane
  2. Most are mobile, and use flagella, cilia and pseudopodia.
  3. Some are sessile.
  4. They reproduce mainly asexually, by binary fission, fragmentation and sporulation.
  5. Some reproduce sexually by conjugation.
  6. Some are heterotrophic e.g. paramecium.
  7. Others are autotrophic e.g. spirogyra.
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