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Notes on Kingdom Protista

Posted by sani Monday, September 20, 2010

Kingdom Protista Characteristics

* Members of this kingdom are often microscopic (unicellular)
* Some protists can make their own food others cannot
* Some protists display much movement others little.

Protista Classification

* Most are microscopic, one-celled organisms.
* Some form colonies of many cells
* May have qualities of both animals and plants
* Some make their own food through photosynthesis
* Many have movement

o Protozoans - "Animal-like" protista


* All Those members of the protista kingdom which act like plants
* Algaes are also found in the Moneran and Plant kingdoms
* Possess more "Plant-like" characteristics
* Other "algaes" are grouped with the monerans and others with plants.
* Vary in color and often named by its color.
* Most live in water, some on damp surfaces
* Make up a large part of the plankton of the oceans
* All algae contain chlorophyll and carry on photosynthesis


* Most are unicellular
* Possess movement like animals
* Move by using whip like tail called flagellum (one only)
* Example Euglena
* Reproduces asexually
* Euglenoid Parts

o Nucleus
o Chloroplasts
o Flagellum
o Eye spot
o Cell membrane

Diatoms - Chrysophyta (golden algae)

* Golden brown algae
* Two part shell of silicon (glass)
* Food stored as oil
* Responsible for most oil consumed today
* Diatom Parts

Dinoflagellates - Pyrophyta

* Surrounded with "plates"
* Has two flagella
* Phosphorescent algae
* Responsible for "red tides"
* Contains toxins


* Protozoans - "Animal-like" protista
* All Those members of the protista kingdom which act like animals
* Cannot make their own food
* Most display a great deal of movement
* Protozoans
* Possess many "Animal-like" characteristics
* Particularly movement
* Some cannot make their own food
* Many relationships from - free living, parasitic, saprophytic, mutualistic
* Often classified by how they move

o Amoeba - moves with Pseudopods (false feet)
o Paramecium - moves with cilia
o Flagellates - move like the Euglena flagellum
o Sporozoans - produce spores
o Amoeba - moves with Pseudopods

Phylum Sarcodina

* Pseudopods (false feet) projections of cytoplasm.
* Some surrounded by a calcium "shell"
* Amoeba has no definite shape

* Amoeba Parts

o Nucleus
o Pseudopods
o Food Vacuole
o Cell membrane
o Amoeba Feeding
o Pseudopods

* Amoeba Movement

o Pseudopods
o Shape is constantly changing
o Food is surrounded by pseudopods and stored in a food vacuole
o Amoeba Movement and Feeding

* Amoeba Reproduction

o Asexual reproduction
o Pseudopods start pulling apart
o Nuclear material replicates itself
o Pseudopods pull apart splitting the cell
o The nucleus splits
o Two smaller cells result

Moves using cilia - short hairs lining cell


* Paramecium Parts

o Macro nucleus
o Micronucleus
o Cilia
o Food Vacuole
o Contractile Vacuole
o Oral Groove
o Cell membrane

Other Ciliophora

* Stentor
* Vorticella
* Spinostomium

Paramecium Reproduction

* Asexual reproduction
* Nuclear material replicates itself
* Nuclear material splits itself
* Cell starts pulling apart
* Two smaller cells result

Flagellates - move like the Euglena

* Mastigophora
* Often have more than one flagellum
* The organism which causes African sleeping sickness - carried by the testie fly
* Some live in the digestive tracts of termites and assist in the digestion of cellulose.

Sporozoans - produce spores

* Sporozoans
* Passive movement (none)
* The organism which causes
* Malaria

Fungus Like Protists

* All Those members of the protista kingdom which act like fungus
* Small group
* Often brightly colored
* Slime Molds
* Myxomycota
* Multicellular
* Change form during life cycle
* Tend to live in damp locations
* Slime Molds
* The three stages are similar to that of other organisms.


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