Protista

Subject: Biology

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Overview

Kingdom protista includes unicellular, eukaryotic and microscopic organisms. They are primitive Eukaryotes.This note contain information about types and characterstics of kingdom protista.
Protista

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:

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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.
Things to remember
  • 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.
  • It includes every relationship which established among the people.
  • There can be more than one community in a society. Community smaller than society.
  • It is a network of social relationships which cannot see or touched.
  • common interests and common objectives are not necessary for society.

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