PROTIST’SPROTISTS

What are Protists

• Any group of EUKARYOTIC organisms belonging to the kingdom Protista.

• Signal- celled organisms

PROTISTS live in

WATERY or MOIST environments.

Adaptations

Some protists, including paramecium and amoeba, have a Contractile Vacuole.

This structure is used for water regulation, pumping out excess water.

3 types of movement

• Flagella • Cilia • Pseudopod

• Protists have adaptive structures for movement including Cilia, Pseudopodia, and Flagella

Adaptations

http://www.youtube.com/watch?v=HXcEACQv5-8

Paramecium movement using cilia:

Amoeba movement using pseudopods:

http://www.youtube.com/watch?v=PsYpngBG394

http://www.youtube.com/watch?v=-uxWx6bnQ4Y

Euglena movement using flagella:

http://www.youtube.com/watch?v=7DALQ-XLJ4Q

Something cool : Euglena is a dietary supplement in the powder form.

• Some protists are AUTOTROPHS, they manufacture their own energy through

photosynthesis or chemosynthesis.

Adaptations

• Euglena have an EYESPOT: a photoreceptive organelle that allows the cells to sense LIGHT direction and intensity and respond to it by swimming either towards the light (positive phototaxis) or away from the light (negative phototaxis).

Positive Phototaxis

Their EYESPOT draws them towards sunlight so their CHLOROPLASTS can make food. (photosynthesis). Euglena are autotrophic AND….

Chemotaxis :Movement of organism toward or away from a chemical stimuli.

• Euglena, and Amoeba are heterotrophic: they get their energy by consuming other organisms

http://www.youtube.com/watch?v=qpw2p1x9Cic

Start here

•Amoeba ENDOCYTOSIS:phagocytosis = solid foodpinocytosis = liquid food

http://www.youtube.com/watch?v=W6rnhiMxtKU

Paramecium are also heterotrophic. They get nutrition by sweeping food into their gullet, using digestive

enzymes, and then exocytosis

http://www.youtube.com/watch?v=a4aZE5FQ284

PARAMECIUM

• Most protists reproduce asexually by binary fission.

http://footage.shutterstock.com/clip-236788-stock-footage-a-microscopic-sequence-showing-paramecium-dividing-by-binary-fission.html?language=de

•A few protists reproduce sexually by conjugation, exchanging genetic material

Words to know for quiz!• Mitosis: Process of nuclear division by

making new body cells (4 stages) Prophase, metaphase, anaphase and telophase.

• Interphase: period of cell cycle in which most time is spent. G1, S and G2

• Daughter cells :cells that come from the parent cells dividing to make new cells (MOTHER & DAUGHTER.

• Cytokinesis: Division of cytoplasm and the end of Mitosis.

Activity

One card stock show (fold 3 tabs like a brochure) how each organism

(paramecium, amoeba, and euglena)moves, eats, and reproduces.

Use pictures, words and labels!