Warm Up

1. Warm Up We have discussed and practiced how scientists classify various things based on characteristics. But what do you do when you have something that doesn’t fit into any one category?

2. Kingdom Protista

3. Characteristics of Protists • Some are single cell….. Some are multicellular (all are eukaryotes)! • Some make their food…. Some eat food! • Some can move…. Some cannot! • Protists do not have special tissues – no muscles, no bones, no teeth, no nerves, no skin, etc

4. What do Protists eat? • Some are autotrophs. (producers) • They use photosynthesis (sun’s energy) to make food. • Some are heterotrophs (consumers) • They must eat other organisms or the remains of other organisms • May be decomposers • May be parasites – invade other organisms to feed on it.

5. How do Protists make more Protists? • Some reproduce asexually • Binary fission. • Some reproduce sexually • Some use bothmethods! • At some point in their life they may use sexual reproduction. • At another point, they may use asexual. • Some have a complex life cycle involving more than one host.

6. Types of Protists that are Producers • Algae – plant like;use photosynthesis but do not have roots or leaves • Seaweed- algae that attaches to surfaces • Red algae, green algae, brown algae • Phytoplankton– free floating, microscopic algae • Make most of the world’s oxygen.

7. More Protists Producers. • Diatoms– single celled, make up most of the phytoplankton • Dinoflagellates– single celled, have flagella used for movement • Euglenoids – have two flagella and an eye spot to sense light

8. Protist Consumers –they need to move to eat • Amoebas– soft, jellylike protists that moves with a pseudopodia (false feet) • Zooflagellates • Wave flagella to move • Ciliates • Move by hundreds of cilia – tiny whip like structures

9. Non Moving Protists. • Water molds – live in soil and water • Some live as parasites • Some are decomposers • Slime molds • similar to fungi • look like thin, colorful globs of slime