Protists

Video IntroductionKingdom Protista – The ProtistsWatch the following video on Discovery

Education: http://player.discoveryeducation.com/index.cfm?guidAssetId=3D84751E-23C5-4538-9090-2725EE7B64D6

Set up Cornell Notes – p. ? Topic - Protists Definition

Protists:(pro-tist)

Eukaryote:(you-care-ee-oats)

Euglena:____________________________________________________________________________________________________(Draw and Label)

Amoeba: ___________________________________________________________________________________________________________________(Draw and Label)

Paramecium: ________________________________________________________________________________________________(Draw and Label)

Volvox: ____________________________________________________________________________________________________________________(Draw and Label)

All Protists are EukaryotesEukaryotes are organisms that have cells with a

distinct membrane-bound nucleus and organelles.

Most unicellular protists are microscopic, however, some multicellular protists grow more than 60 meters in a year.

Today we will be discussing unicellular protists.Definitions:

Protist: (pro-tist) Unicellular, multicellular or organisms in a colony with diverse nutritional and reproductive means.Eukaryotes: (you-care-ee-oats) Organisms that have cells with distinct membrane around nucleus and organelles.

Euglena Euglena (you-glee-nuh) is a unicellular protist with characteristics of

both plants and animals. It moves freely and feeds on other organisms, like an animal. Has the ability to make its own food, like a plant.

Contains chloroplasts which are organelles that store chlorophyll and is a site to perform photosynthesis. Chloroplasts: (clor-oh-plasts) cell organelles in the Euglena Chlorophyll: (clor-oh-fil) green pigment that captures energy for

photosynthesis from the sun. Photosynthesis: (fo-toe-sin-tha-sis) process which organisms use

light energy to join carbon dioxide and water to make nutrients.

Euglena: a unicellular protist with a reddish eyespot and a single flagellum, found in stagnant waters.

Euglena DiagramNucleu

s

Chloroplasts (with chlorophyll)

Flagellum

Eyespot

Contractile vacuole

AmoebaAn Amoeba (uh-mee-buh) is a unicellular

protistAnimal-like because they feed on other

organisms and are able to move freely.Feeds and moves by using structures called

pseudopods. (false feet)Surrounds another protist and takes it into

its cytoplasm and digests it. Amoeba: a unicellular protist which is able to change shape

because of the movements of pseudopods. They live in fresh water or soil or as parasites in man and animals.

Amoeba

ParameciumParamecium (pair-uh-mee-see-um) is unicellular protist found in

ponds and slow moving streams. This cell is covered with cilia, which are tiny hairs and are used for

movement.Feeds through its oral groove as it moves through water. Eats

bacteria, algae, and other small organisms.Could be described as animal-like because of how it feeds and

moves.Excess water is pumped out of the cell by the contractile vacuole to

prevent the cell from bursting.Has 2 nuclei; one needed for cell processes, the other is used only for

sexual reproduction.

Paramecium: a unicellular protist covered in cilia. The cilia is used for mobility and the Paramecium feeds through its specialized cell structure, its oral groove.

Paramecium

Oral Groove

Micronucleus

Macronucleus

Contractile vacuole

VolvoxVolvox (vol-vox) is also a unicellular protist. Has chloroplasts to carry out photosynthesis

for its food source.Volvox is unique because it lives in a group

of cells called a colony.Each cell close to the surface propels the

colony through water with their two small flagella.

Volvox: a unicellular protist which lives in a colony and moves through the water with flagella. (freshwater algae)

Volvox

Protists Groups and FeaturesDraw Table below on Page ?

Protist Structure Locomotion

(Movement)

Food source

(Energy)

Specialized Cell

Structure

Euglena

Amoeba

Paramecium

Volvex

Protists Groups and FeaturesProtist Structure Locomotion

(Movement)Food source

(Energy)Specialized

Cell Structure

EuglenaUnicellular Flagellum Feeds on other

organisms; can make nutrients

Eyespot

AmoebaUnicellular Pseudopods Feeds on other

organisms

ParameciumUnicellular Cilia Feeds on other

organismsOral groove and contractile vacuole

Volvex Unicellular

(lives in colonies)

Flagella Makes nutrients

Quick Check Quiz 1. Which protist is covered with cilia? a. Euglena b. Amoebac. Paramecium d. Volvox 2. Which protist moves by forming pseudopods? a. Euglena b. Amoeba c. Paramecium d. Volvox3. Which two protists share a feature with plant cells? a. Amoeba and Paramecium b. Euglena and Volvoxc. Amoeba and Euglena d. Paramecium and Volvex4. Which protists have a unicellualar structure? a. Euglena b. Paramecium c. Amoebad. All the above