Classified Kingdoms/Protista

From Wikiversity
Jump to navigation Jump to search

The word, protista, means "the very first" as they are the first eukaryotes (eukaryotes that are not members of the plant, animal, or fungi kingdoms). Protista can be multicellular or unicellular.


Protista are hard to classify since they exhibit some characteristics of other kingdoms but not all of the characteristics. One way to classify:

  • Animal-like protists: heterotrophs
  • Plant-like protists: autotrophs
  • Fungi-like protists: decomposers (heterotrophs)

Types[edit | edit source]

Protozoa (Animal-like)[edit | edit source]

Protozoa are classified by their movement.

Type of Protozoa Movement Things to Note
Zooflagellates Have flagella Have no chlorophyll or other photosynthetic chemicals
Sarcodines Cytoplasmic streaming through pseudopods Amoeba
Ciliates Have cilia (small hairs that accommodate movement) Paramecium
Sporozoans Sessile Many are disease-causing, such as malaria.

Unicellular Algae (Plant-like Protista)[edit | edit source]

Type of Algae Features Other Things to Note
Euglenophytes Have flagella for movement; eyespot to help find the sun Euglena
Chrysophytes "Golden plants"; gold-toned chloroplasts
Diatoms Thin, delicate cell walls of silicon Glass-like appearance
Dinoflagellates Half photosynthetic, half heterotrophic Many give off light

Red, Brown and Green Algae (Plant-like Protista)[edit | edit source]

Type of Algae Type of Chlorophyll Other things to Note
Red Algae Chlorophyll a (absorbs blue light, reflects red) Can live in deep, ocean waters.
Brown Algae Chlorophyll a and c Grows in shallow waters, EX: Giant Kelp.
Green Algae Chlorophyll a and b Most like actual land plants; can be unicellular (some freshwater algae) or multicellular

Fungus-like Protista[edit | edit source]

Fungus-like Protista contain centrioles while true fungi don't. True fungi also have chitin, or fungi cell walls, while the fungus-like Protista don't. Although the differences, both are them are decomposers.

Slime molds[edit | edit source]

Slime mold in Scotland

Slime molds are fungus-like Protista that help recycle organic matter. These molds look like ameobas and form mold-like clumps.

Water molds[edit | edit source]

Water molds are fungus-like Protista that thrives on dead or decaying matter in water---an example of this is the white fuzz that is present on dead fish.

Reproduction[edit | edit source]

Asexual Reproduction Sexual Reproduction
Mitosis Meiosis
Binary Fission- when an organism will copy its DNA and then divide to produce two identical daughters. Conjugation - when 2 organisms line up side by side to exchange genetic material through a conjugation tube.
Alternation of Generations - alternate between haploid and diploid statuses.

Ecological/Human Impact[edit | edit source]

Ecological Impact
  • Help recycle organic matter (decomposers)
  • Indication of water quality: too much algea means the water is polluted.
  • Agents of Disease
  • Plant-like products serve to be producers in many food chains.
Human Impact
  • Food Source (ice cream)
  • Medicine
  • Science

Threats[edit | edit source]

  • Other Protista's eat each other, reducing the population of Protista.
  • Different types of medicines are made by doctors or scientists to kill Protista's in the Human Body.

Habitat[edit | edit source]

Most protists are aquatic little creatures, and they usually live in places and locations where they are more water, some examples are: Oceans, Lakes, Swamps, Short Streams, Gardens, Seas, Ponds and more.

Picture or Physical Description (include color)[edit | edit source]

  • Mostly purple

Food[edit | edit source]

Usually, if caught in an animal's body, the Protista would eat the animal's digestive system and body parts, thus, leading to death for the poor animal. Also, if not in animal's body, it would eat each Protista.

Specialized Body Parts[edit | edit source]

  • Membrane
  • Nucleus

Movement[edit | edit source]

  • Cilia - Cilia are microscopic Hairs which are used for launching.
  • Flagella - Flagella are propellers used for jumping to move far.
  • Pseudopodia - Pseudopodia is the projection they use, they use this tool to move around.