chapter 7 section 1. what is a protist? eukaryotes, (have nuclei) live in moist surroundings. most...
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Chapter 7
Section 1
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What is a Protist?
Eukaryotes, (have nuclei) Live in moist surroundings. Most are unicellular, but some are
multicellular. Some are heterotrophs, some are autotrophs,
and a couple are both.
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Grouping Protists
Three categories: animal-like fungus like plantlike
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Animal-like Protists also called
protozoans are
heterotrophs. Most can move
from place to place to get food.
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Animal-like Protists Many protozoans
that live in fresh water have contractile vacuoles.
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Animal-like Protists
Four types: sarcodines ciliates, flagellates sporozoans
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Animal-like Protists Sarcodines move
and feed by using pseudopods.
Pseudopods are temporary bulges of the cell membrane that fill with cytoplasm.
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Animal-like Protists Ciliates are covered with hairlike projections
called cilia. They use cilia to move, obtain food, and
sense the environment.
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Animal-like Protists Zooflagellates move using whiplike flagella.
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Animal-like Protists
Sporozoans are parasites that feed on their hosts’ cells and body fluids.
Plasmodia attacking RBC
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Funguslike Protists heterotrophs, have cell walls use spores to
reproduce. Unlike fungi, all
funguslike protists are able to move at some point in their lives.
Dog vomit slime mold
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Funguslike ProtistsThe three types: water molds downy mildews slime molds.
Slime mold fruiting bodies
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Plantlike Protists Plantlike protists are
called algae. autotrophs variety of colors
because they contain many types of pigments—chemicals that produce color.
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Plantlike Protists - Euglenoids
Euglenoids can become heterotrophic when sunlight is not available.
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Plantlike Protists - Dinoflagellates covered by stiff
plates move using two
flagella. beautiful,
glasslike cell walls.
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Plantlike Protists - Algae Green algae live in
fresh water, salt water, and moist places on land.
Red algae and brown algae live in the oceans.
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Brown Algae