Biological classification (kingdom protista)

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Protista

Characteristics

  • Eukaryotes :-Specific membrane-bound cell organelles & distinct nucleus 
  • They are mostly  unicellular i,e made of one cell
  • Some are autotrophic, while other are heterotrophic
  • They prefer moist and aquatic habitats
  • They reproduce both sexually and asexually
  • They are plant - like protists (algae) 
  • They are animal like - protists(protozoa)
  • They are fungus like -protists (slime moulds, water moulds )

Protists

They are of  five types:-
  • Chrysophytes
  • Euglenoids
  • Protozoans
  • Dianoflagellates
  • Slime moulds

Chrysophytes

  • They are also known as golden plants
  • They are diatoms 
  • plant- like protists
  • They contain chlorophyll, carotene, & Xanthophylls
  • Rigid cell wall made of pectin/cellulose/sillica
Habitat:- 
  1. Aquatic
  2. Can be fresh water/ marine
  3. Float passively on water
  4. Mostly photosynthetic
  5. Diatoms: main producers of food in oceans 
  6. Store food as oil 
  7. Few are heterotrophic eating small bacteria
Reproduction :-Moslty asexual

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