Protists are unicellular organisms that have a nucleus. Kingdom: Protista

Similar to Bacteria Same Unicellular One of the first groups of living things on Earth. (1.5 billion years ago.) Microscopic Can cause disease. Can be parasites Same

Difference from Bacteria Has a nucleus. Live in watery environment. Generally live as individual cells. Protists vary greatly in appearance and function. Different

3 Categories I. Animal-like Protists. II. Plant-like Protists. III. Fungus-like Protists.

I. Animal-like Protists Protozoan means “First Animal”. Cells contain a nucleus. Cells lack a cell wall. They are heterotrophs. Most can move on their own. Little Animals

One type: Amoeba Most familiar Sarcodine. Pseudopods: False Foot Blob shaped. Moves by stetching its cytoplasm

Type: Paramecium Pellicle: tough outer wall. Slipper shaped Oral groove: like the mouth Gullet: holds food. Anal Pore: removes wastes 2 Nuclei Reproduces by either binary fission or conjugation.

Plant-like Protists (Algae) Unicellular and Multicellular Can move on their own Autotrophs: make their own food from simple materials using light energy (photosynthesis). 70% of the Earth’s oxygen is produced by Plant-like Protists!

1. Euglena Green Unicellular Live in fresh water Flagella Eyespot: sensitive to light. Chloroplasts

III. Fungus-like Protists Heterotrophs: Must consume food- can not make it themselves Have cell walls. Many have flagella and are able to move at some point in their lives. Example: Slime Molds

Slime Molds Type: At first they look like amoeba, then later they look like mold. Live on moist & shady places.