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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.

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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:

1 Chapter 21 Protist and Fungi

2 Protists are the most diverse of all eukaryotes protists: eukaryotes that are not animals, plants, or fungi but show characteristics of those kingdoms.

3 Protist Introduction

4 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

5 Protists are broken into 3 different groups…

6 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

7 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

8 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.

9 Fungus Like Protists Decomposers Obtain energy from breaking down dead organic matter Cell wall made of cellulose and not chitin Examples: Slime molds

10 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

11 Plant Like Protists Colonial: volvox Several single celled plant like protist that live and function together. Euglena have both characteristics of plants and animals

12 Fungus Kingdom 2 nd kingdom of eukaryotes Characterized by decomposition

13 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

14 Mycelium carry out the decomposition process. Absorptive nutrition – Mycelium release enzymes to break down material and then absorbs the digested material

15 How do Fungi Reproduce? Spores: – Released into the air or water to allow fungi to reproduce asexually – Able to withstand harsh, dry environmental conditions.

16 Types of Fungi Club fungi – Typical mushrooms Mold Yeast – Imperfect fungi – Only reproduce asexually

17 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

18 Roles of Fungi Disease – Athletes foot – yeast infections – dutch elm disease – chytrid fungus.


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