Presentation on theme: "Chapter 21 Protist and Fungi. Protists are the most diverse of all eukaryotes protists: eukaryotes that are not animals, plants, or fungi but show characteristics."— Presentation transcript:
Chapter 21 Protist and Fungi
Protists are the most diverse of all eukaryotes protists: eukaryotes that are not animals, plants, or fungi but show characteristics of those kingdoms.
Diversity of Protists – Can be microscopic or can be extremely large. – Can be single celled or can be multi- celled. – Can be autotrophic or heterotropic
Protists are broken into 3 different groups…
1. Animal Like Protists (protozoans) Animal like protists are heterotrophs Eat bacteria, other protists, non-living organic matter Lack cell wall Live in most aquatic environments & some in body fluids
Protozoans are broken down into different groups by how they move. – Zooflagellates Use flagella to move – Ciliates Have cilia to move Or feed – Pseudopods “false foot” Use cytoplasm to move
Examples of Protozoans Paramecium: – Cilliate found in ponds Stentor – Ciliate that uses cilia around mouth to feed. Plasmodium – Protozoan that causes malaria Giardia – Zooflagellate that can lead to giardiasis.
Fungus Like Protists Decomposers Obtain energy from breaking down dead organic matter Cell wall made of cellulose and not chitin Examples: Slime molds
Plant Like Protists Autotrophs – Obtain energy through photosynthesis – All contain chloroplast to photosynthesize Can be single celled – Euglena: Flagellate that uses an eyespot to detect light. When light is not present it can become heterotrophic
Plant Like Protists Colonial: volvox Several single celled plant like protist that live and function together. Euglena have both characteristics of plants and animals
Fungus Kingdom 2 nd kingdom of eukaryotes Characterized by decomposition
Parts of a fungi Reproductive Structure – Part above ground that is seen. – Used to characterize the fungus Hyphae – Cytoplasmic threads with chitin cell walls Mycelium – Mat of hyphae underground
Mycelium carry out the decomposition process. Absorptive nutrition – Mycelium release enzymes to break down material and then absorbs the digested material
How do Fungi Reproduce? Spores: – Released into the air or water to allow fungi to reproduce asexually – Able to withstand harsh, dry environmental conditions.
Types of Fungi Club fungi – Typical mushrooms Mold Yeast – Imperfect fungi – Only reproduce asexually
Roles of Fungus Help with decomposition and adding nutrients to soil. LICHEN – Fungus and algae – 1 st to grow on rocks and help to create soil Mycorrhizae – Fungus increases the surface area of plant roots Food – Cheese, bread, beer
Roles of Fungi Disease – Athletes foot – yeast infections – dutch elm disease – chytrid fungus.