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Protist.notebook March 01, 2017

Kingdom Protista

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Kingdom Protista

• 65,000 identified with almost half extinct * There is great in the way in which they move and obtain .

Protists are microscopic *unicellular *all reproduce asexually but a few can also reproduce sexually, exchanging genetic information *found in freshwater, marine, and moist terrestrial ∙ many serve as for other organisms in aquatic habitats; They are often called (protozoans) or () are thought to have evolved about 1.5 billion years ago. Protist.notebook March 01, 2017 Grouped by how they obtain energy

Protists are grouped into 3 general categories based on how they obtain their energy.

Some can be both autotrophic and heterotrophic depending on the conditions for survival. 1. -like - referred to as protozoans (pro means 'first,' and zo refers to ''..the first animals) ∙ Ingest or absorb food after capturing or trapping it.

2. -like - referred to as algae Produce food through

3. -like - referred to as slime and water molds Obtain food by external as a decomposer or parasite Protist.notebook March 01, 2017

The means for movement (locomotion) of protists

Protists are known for having one of the following 3 means of movement.

1) - ex

2) Cilia - ex.

3) Pseudopod - ex. Protist.notebook March 01, 2017 1) Protists that move with a flagella aka

A flagella (or flagellum) is a long whip-like that the protist uses to

move or to catch food. Flagellates can be animal­like, plant­like or fungus­like protists.

"" means animal, so animal­like flagellates are called is found in feces infested fresh water and is a parasite in the intestine that causes severe abdominal cramps and diarrhea.

Euglena • plant­like protists that have flagella • have chlorophyll • euglenas have no wall and ingest food similar to the way some protozoans do • euglenas are unique in that they are both photosynthetic and heterotrophic • possess a red 'eyespot' that enables them to detect light

Trypanosomes cause sleeping sickness but are carried only by Tsetse Protist.notebook March 01, 2017

2) Protists that move by using "Cilia" ­ aka

Cilia are tiny hair­like projections that extend from the surface of their .

They use the cilia to: *sweep food into their mouth­like structures and *beat them in rhythm to move The most common know is the paramecium.

Stentors and are also well known ciliates. Protist.notebook March 01, 2017

3) Protists that move by using a Pseudopod (false foot).

Pseudopods - (false foot) fingerlike projections of the cell membrane and cytoplasm used to catch food and to move. Amoeba is the most familiar protist that moves with a pseudopod.

• some that live in freshwater springs in countries such as can produce a painful diarrhea in those who have not developed an to their effects Protist.notebook March 01, 2017

REVIEW Protist.notebook March 01, 2017

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Protist Reading https://gtm­media.discoveryeducation.com/videos/DSC/data/888AE3B6­ BB02­4C59­A503­8196E42A38D7.pdf

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http://www.ck12.org/life­science/Protist­Characteristics­in­­Science/lesson/Protist­Characteristics­MS­LS/?referrer=concept_details Protist.notebook March 01, 2017