Notes on Protista | Grade 11 > Biology > Introduction to Protista | KULLABS.COM

Protista

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Kingdom protista includes unicellular, eukaryotic and microscopic organisms. They are primitive eukaryotes.

Types of protista:

  • Plant-like protista (producer)
  • Animal like protista (consumer)
  • Fungus like protista (decomposer)
Plant like protista
source:factorsaffecting.wikispaces.com
fig:Plant like Protista

Plant like Protista:

It includes:

  • Euglena like organisms having mixotrophic mode of nutrition→ Euglenophyta
  • Diatoms ( Bivalvea, unicellular, photosynthetic algae)→ Chrysophyta
  • Dinoflagellates (Biflagellate, unicellular, photosynthetic algae)→Pyrrophyta
Animal like protista
source:factors affecting.wikispaces.com
fig:Animal like Protista

Animal like Protista:

It includes protozoans→ Protozoa

Fungus like protista
source:www.biologycorner.com
fig:Fungus like protista

Fungus like Protista:

It includes slime moulds ( unicellular, saprobic, fungus like)→ Gymnomycota

Characteristics of Protista:

  • They are unicellular, eukaryotic and microscopic.
  • They may be photosynthetic, holozoic, saprobic, parasitic.
  • Mostly they are aquatic and some are found in damp soil.
  • Locomotory organelles may be present or absent if present they may be pseudopodia, cilia, flagella.
  • The cell of some Protista contains the cell wall and others do not have the cell wall.
  • Digestion is intracellular.
  • It occupies all the 3 niche of ecosystem i.e. they may be the producer, consumer or decomposer.
  • They are the connecting link between prokaryotes and higher eukaryotes.
  • Reproduction is carried out by both sexual and asexual method.



  • They are unicellular, eukaryotic and microscopic.
  • They may be photosynthetic, holozoic, saprobic, parasitic.
  • Mostly they are aquatic and some are found in damp soil.
  • Reproduction is carried out by both sexual and asexual method.
  • Kingdom protista includes unicellular, eukaryotic and microscopic organisms.
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