WEEKLY TOPIC: Warm Up Classifing living Things What is the importance of a dichotomous key? Today You Need Out: Weekly Vocabulary: 1. Agenda Book 2. Unicellular Organisms guided notes Week’s Agenda: 1. Review of what is a living organism is 2. Introduction to unicellular organisms Homework: Cell project What is an living organism review Living things ▶ 1. living things are made of cells ▶ 2. living things grow and develop ▶ 3. living things reproduce ▶ 4. Living things use energy ▶ 5. Living things respond to their environment Living things Cells are basic building blocks of life Autotrophs are organisms that make their own energy Heterotrophs are organisms that rely on other living things to gain energy Living things Taxonomy branch of science which classifies organisms by appearance and behavior Dichotomous key is a tool that allows us to determine the identity of organisms King Phillip Came Over For Good Spaghetti PROTISTS 4+ EUGLENA, AMOEBA, PARAMECIUM, VOLVOX What is a protist? . • Protist—an organism from the Kingdom Protista • Very diverse group of single-celled organisms. • Eukaryotic (They have nuclei.) • ` Common Protist Draw the table. Use a full page. 5 columns, 5 rows. Protist Sketch Movement Food Special Name source Features (Energy) Euglena Amoeba Paramecium Volvox EUGLENA Euglena •Found in calm fresh and saltwater • Autotroph – gets energy via photosynthesis • Heterotroph —also gets nourishment heterotrophic like animals • Has features of both plants and animals • Kingdom Protista •Reproduces asexual Euglena • Moves by a flagellum • eye spot • Contains chloroplasts • Common in freshwater • No cell wall so it can change shape.` AMOEBA • Found in freshwater and saltwater around a lot of dead and decaying material. • Hunter • Can be parasite in humans Amoeba • Changes shape dramatically • Heterotrophic • Eats bacteria, algae, and other protists • Reproduces asexually •Movement- The cell shapes itself into pseudopods (false feet) •amoeba video Amoeba • Reproduction- - asexual PARAMECIUM • Found in freshwater. • Cilia sweep food into food passageway. Paramecium • Shape of a pill capsule • Heterotrophic • Relatively large • Common in pond scum and freshwater • Has two nuclei (macro and micro)`Sexual reproduction Paramecium • Uses cilia to sweep food into the oral groove • Feeds on microorganisms like bacteria, algae, and yeasts • Is covered in cilia so it spirals through water` VOLVOX • Found in ponds ditches and puddles. • Composed of a colony of more than 50,000 tiny cells • Often called algae. Volvox continued… • photosynthesis and flagella help bring in nutrients. • Eyespots sense light. Volvox continued… • Movement- Many flagella help move the colony. • Reproduction- asexual and sexual Volvox • A spherical colony of up to 50,000 cells • Contains chloroplasts •Moves and acts as one multicellular organism but one cell can survive independent of the colony` Volvox • Type of green algae • freshwater – ponds, ditches, puddles, lagoons • Colonies use flagella to swim • Cells have eyespots • Makes food by photosynthesis Volvox Videos Watch them revolve. • video 1 • video 2 Common Protists Protists Groups and Features Draw Table below on Page ? Protist1 Sketch Movement Food Special source Features (Energy) Euglena Amoeba Paramecium Volvox Common Protists Protist Sketch Movement Food source Specialized (Energy) Features ProtistsUnicellular GroupsFlagellum andFeeds Featureson other Eyespot Euglena organisms; Also makes its own food by photosynthesis Unicellular Pseudopods Feeds on other Amoeba organisms Unicellular Cilia Feeds on other Oral groove and Paramecium organisms contractile vacuole Lives in colonies Flagella Makes its own Volvox food by photosynthesis Volvox.