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PROTISTSPROTISTS
Chapter 21Chapter 21
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Protists: single-celled living organisms that are more complex and varied than bacteria.
Believed to have evolved from bacteria.
Protists: single-celled living organisms that are more complex and varied than bacteria.
Believed to have evolved from bacteria.
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Some protists are autotrophic (also referred to as plant-like protists).
Some protists are heterotrophic (also referred to as animal-like protists).
Some protists are autotrophic (also referred to as plant-like protists).
Some protists are heterotrophic (also referred to as animal-like protists).
INTRO TO PROTIST LABINTRO TO PROTIST LAB
In this lab we are going to look at four different types of protists:
In this lab we are going to look at four different types of protists:
Paramecium
Diatoms
Amoeba
Euglena
INTRO TO PROTIST LABINTRO TO PROTIST LAB
EuglenaA plant-like AND animal-like protist.Plant-like because this organism
contains, chloroplasts, which make food.
Animal-like because it can move from place to place. Uses a flagellum to do so.
EuglenaA plant-like AND animal-like protist.Plant-like because this organism
contains, chloroplasts, which make food.
Animal-like because it can move from place to place. Uses a flagellum to do so.
INTRO TO PROTIST LABINTRO TO PROTIST LAB
Euglena (cont.)Does not contain a cell wall.Has a sense organ called an eye-
spot to detect light and dark environments.Why is this important?!?!
Euglena (cont.)Does not contain a cell wall.Has a sense organ called an eye-
spot to detect light and dark environments.Why is this important?!?!
INTRO TO PROTIST LABINTRO TO PROTIST LAB
ParameciumAn animal-like protist. Does not
contain chloroplasts to make own food.
Uses tiny hairs called cilia to move through the environment.
Food intake through oral groove. Waste exits through anal pore.
ParameciumAn animal-like protist. Does not
contain chloroplasts to make own food.
Uses tiny hairs called cilia to move through the environment.
Food intake through oral groove. Waste exits through anal pore.
INTRO TO PROTIST LABINTRO TO PROTIST LAB
AmoebaAn animal-like protist. Does not
contain chloroplasts to make own food.
Moves by changing shape. Limb-like extensions called pseudopodia, meaning “false-foot”.
AmoebaAn animal-like protist. Does not
contain chloroplasts to make own food.
Moves by changing shape. Limb-like extensions called pseudopodia, meaning “false-foot”.
INTRO TO PROTIST LABINTRO TO PROTIST LAB
Amoeba (cont.)Food intake by engulfing. Uses
pseudopodia to do so.
Amoeba (cont.)Food intake by engulfing. Uses
pseudopodia to do so.
INTRO TO PROTIST LABINTRO TO PROTIST LAB
DiatomsProtists with unique shells made up of
silica. Plant-like because they make their
own food using chloroplasts.Plant-like because they cannot move
on their own.
DiatomsProtists with unique shells made up of
silica. Plant-like because they make their
own food using chloroplasts.Plant-like because they cannot move
on their own.
INTRO TO PROTIST LABINTRO TO PROTIST LAB
Abundant in the ocean.Empty shells of diatoms form thick
deposits called “diatomaceous earth”, which is used commercially in abrasives, street paint, and even toothpaste.
Abundant in the ocean.Empty shells of diatoms form thick
deposits called “diatomaceous earth”, which is used commercially in abrasives, street paint, and even toothpaste.
PROTIST LABPROTIST LAB
Your job, in pairs, is to…-Examine euglena, paramecium, amoeba, and diatoms using a compound light microscope at 400x magnification.-Accurately draw diagrams of each organism, labeling specific characteristics as indicated on your lab handout.-Answer post-lab questions after you complete your diagrams.
Your job, in pairs, is to…-Examine euglena, paramecium, amoeba, and diatoms using a compound light microscope at 400x magnification.-Accurately draw diagrams of each organism, labeling specific characteristics as indicated on your lab handout.-Answer post-lab questions after you complete your diagrams.
