1. Protists and Fungi Book A: Chapter 3
Have you ever heard of Protists before reading this chapter? What are some examples of Protists?
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2. Protists Objectives Section 1
Describe the characteristics of protists.
Describe four ways that protists get food.
Describe three ways that protists reproduce.
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3. General Characteristics
Section 1
Protists
General Characteristics
Protists Are Varied Most protists are single-celled organisms, but some are made of many cells, and others live in colonies.
Eukaryotic Organisms All protists are eukaryotic.
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4. Protists Protists and Food Section 1
Producing Food Like plants, some protists make their own food.
Finding Food Some protists must get food from their environment. These protists are heterotrophs. Heterotrophs are organisms that cannot make their own food.
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5. Producing More Protists
Section 1
Protists
Producing More Protists
Asexual Reproduction Most protists reproduce asexually.
Sexual Reproduction Some protists can reproduce sexually. Sexual reproduction requires two parents.
Members of the genus Paramecium sometimes reproduce sexually by a process called conjugation.*
* Conjugation is NOT sexual reproduction.
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6. Producing More Protists, continued
Section 1
Protists
Producing More Protists, continued
Reproductive Cycles Some protists have complex reproductive cycles. These protists may change forms many times.
The next slide shows the life cycle of Plasmodium vivax.
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7. The Life Cycle of Plasmodium Vivax
Section 1
The Life Cycle of Plasmodium Vivax
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8. Kinds of Protists Bellringer Section 2
Do you know what algae is? Have you ever seen it? What does it look like? Algae needs a lot of water in order to live. Where do you suppose most algae live?
Record and illustrate your answers in your science journal.
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9. Kinds of Protists Objectives Section 2
Describe how protists can be organized into three groups based on their shared traits.
List an example for each group of protists.
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10. Kinds of Protists Protist Producers Section 2
Red Algae Most of the world’s seaweeds are red algae.
Green Algae The green algae are the most diverse group of protist producers. They are green because chlorophyll is the main pigment in their cells.
Brown Algae Most of the seaweeds found in cool climates are brown algae.
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11. Protist Producers continued
Section 2
Kinds of Protists
Protist Producers continued
Diatoms Diatoms are single celled. They are found in both salt water and fresh water.
Dinoflagellates Dinoflagellates have two whiplike strands called flagella (singular, flagellum). The beating of these flagella causes the cells to spin through the water.
Euglenoids Most euglenoids live in fresh water. They use their two flagella to move through the water.
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12. Heterotrophs That Can Move
Section 2
Kinds of Protists
Heterotrophs That Can Move
Amoebas Amoebas and similar amoeba-like protists are soft, jellylike protozoans. They are found in both fresh and salt water, in soil, and as parasites in animals.
Amoebic Movement Amoebas and amoeba-like protists move with pseudopodia.
Shelled Amoeba-Like Protists Not all amoeba-like protists look shapeless. Some have an outer shell.
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13. Heterotrophs That Can Move continued
Section 2
Kinds of Protists
Heterotrophs That Can Move continued
Flagellates Flagellates are protists that wave flagella back and forth to move. Some flagellates live in water. Others live in the bodies of other organisms.
Ciliates Ciliates are complex protists. They have hundreds of tiny, hairlike structures known as cilia. A ciliate is shown on the next slide.
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14. Section 2
A Paramecium
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15. Heterotrophs That Can’t Move
Section 2
Kinds of Protists
Heterotrophs That Can’t Move
Spore-Forming Protists All spore-forming protists are parasites. They absorb nutrients from their hosts. They have no cilia or flagella, and they cannot move on their own.
Water Molds Water molds live in water, moist soil, or other organisms. Some of them are decomposers and thus eat dead matter. But many are parasites.
Slime Molds Slime molds are heterotrophic protists that can move only at certain phases of their life cycle. They look like thin, colorful, shapeless globs of slime.
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16. Fungi Bellringer Section 3
Many people love to eat mushrooms. What are mushrooms? There are many different types of edible mushrooms. How many can you name that you’ve eaten? How many mushrooms can you name that are available at your grocery store to eat?
Record your answers in your science journal.
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17. Fungi Objectives Section 3 Describe the characteristics of fungi.
Distinguish between the four main groups of fungi.
Explain how lichens affect their environment.
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18. Characteristics of Fungi
Section 3
Fungi
Characteristics of Fungi
Food for Fungi Fungi are heterotrophs, but they cannot catch or surround food. Fungi must live on or near their food supply.
Hidden from View Some fungi are single celled, but most fungi are made of many cells. Multicellular fungi are made up of chains of cells called hyphae. Most of the hyphae grow together form an underground mass called the mycelium, which makes up the major part of the fungus.
Making More Fungi Reproduction in fungi may be either asexual or sexual.
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19. Fungi Kinds of Fungi Section 3
Threadlike Fungi Most threadlike fungi live in the soil and are decomposers. However, some threadlike fungi are parasites.
Sac Fungi Sac fungi are the largest group of fungi. Sac fungi include yeasts, powdery mildews, truffles, and morels.
Club Fungi The umbrella-shaped mushrooms are the most familiar fungi. Mushrooms belong to a group of fungi called club fungi.
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20. Kinds of Fungi continued
Section 3
Fungi
Kinds of Fungi continued
Nonmushroom Club Fungi Mushrooms are not the only club fungi. Bracket fungi, puff-balls, smuts, and rusts are also club fungi.
Imperfect Fungi The imperfect fungi group includes all of the species of fungi that do not quite fit in the other groups.
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21. Section 3
Fungi
Lichens
An Organism Alliance A lichen is a combination of a fungus and an alga that grow together. The alga actually lives inside the protective walls of the fungus. The resulting organism is different from either organism growing alone. The lichen is a result of a mutualistic relationship.
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22. Protists and Fungi Concept Map Chapter 11
Use the following terms to complete the concept map on the next slide: algae, slime molds, asexual, protists, eukaryotes, amoebas, sexual, fungi, decomposers, host.
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23. Chapter 11
Concept Map
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24. Chapter 11
Concept Map
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