protists and fungi
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Protists and Fungi. Protist Kingdom. The protist kingdom is sometimes called the “junk drawer” kingdom because it is filled with organisms that don’t fit easily into other kingdoms. - PowerPoint PPT PresentationTRANSCRIPT
Protists and Fungi
• The protist kingdom is sometimes called the “junk drawer” kingdom because it is filled with organisms that don’t fit easily into other kingdoms.
• Even though some protists are unicellular and some are multi-cellular; and even though some are heterotrophs and some are autotrophs…
• All protists are eukaryotes– Eukaryotes are organisms whose
cells contain a nucleus.
Three Types of Protists• Because protists vary greatly, scientists
have proposed three ways of grouping protists.
• There are three different types– Animal-like protists– Plant-like protists– Fungus-like protists
Animal Like Protists• Like animals, animal-like
protists have structures that enable them to move around.
• And these organisms, like animals, are heterotrophs.
• Animal-like protists are called protozoans and they are unicellular, unlike animals.
Protozoans With Pseudopods• Pseudopods are
temporary bulges of the cell membrane.
• The cytoplasm flows into the bulge and the rest of the organism follows.
• Amebas are protozoans that use pseudopods to move.
Protozoans With Cilia • Cilia are hair like
projections from cells that move with a wavelike pattern.
• Cilia move organisms by acting like tiny oars.
• Paramecium are protozoans that use cilia to move around.
Other Protozoans• Some protozoans use
flagella for movement.• Other protozoans called
sporozoans are characterized by the way they live.
• Sporozoans are parasites.– Parasites are organisms who
live on or in another organism and harm that organism.
– Hosts are the organisms to which the parasites live.
Plantlike Protists• Most plantlike protists are called algae.• All algae are autotrophs.
Fungus-like Protists• Fungus-like protists are heterotrophs,
have cell walls, and use spores to reproduce.
• Spores are tiny cells that are able to grow into a new organism
Fungi Kingdom• Fungi Facts
– Use spores to reproduce– Eukaryotes– Heterotrophs– Need warm moist places
to grow– Multi-cellular fungi are
arranged in hyphae• Hyphae are branching,
threadlike tubes that make up the bodies of the fungi.
Food for Fungi
• Some fungi feed on the remains of dead organisms.– Ex: Mushrooms
• Other fungi are parasites that break down chemicals in living organisms.– Ex: Athletes foot fungus