Single Celled Organisms Adapted from www micrographia com

Single Celled Organisms Adapted from www. micrographia. com by Ms. Shaw

• Clarifying objective: 7. L. 1. 1 • Compare the structures and life functions of single-celled organisms that carry out all the basic functions of life including: Euglena, Amoeba, Paramecium, and Volvox.

Things to think about: -How do living things move? -How do living things eat? -Do all living things contain cells? Is a cell a living thing?

What are Protozoa (of the Protist Kingdom)? Protozoa (1 st animals) -classified by how they move.

Autotrophs make their own food. -Photosynthetic autotrophs make their own food using energy from light. -Chemosynthetic autotrophs do the same thing using energy obtained from the breakdown of chemicals. Heterotrophs require food as they cannot make their own. -by ingestion eat by consuming food. - by absorption eat by secreting digestive enzymes outside of their bodies, then absorbing the nutrients into their bodies.

Make a chart with 4 columns and 5 rows How Obtains Food Euglena Volvox Amoeba Paramecium How It Moves Unique Characteristics

Euglena 1. How the organism obtains food: Photosynthetic Autotroph & Heterotrophic 2. How the organism moves: by flagella 3. Any unique characteristics pigment spot (or stigma), positive phototaxis

Flagella - A long, threadlike appendage. Euglena

Volvox 1. How the organism obtains food: Photosynthetic 2. How the organism moves: colonial flagellate 3. Any unique characteristics: colony is made up of many zooids (individuals) organized in hollow ball. Some division of labor exists within colony.

Amoeba 1. How the organism obtains food Heterotrophic: uses pseudopods to feed by engulfing the prey and incorporating it into their cytoplasm. 2. How the organism moves by pseudopods (false feet) temporary extensions of the cell - in any direction 3. Any unique characteristics Have no definite shape or form

Pseudopodia - A temporary projection of the cytoplasm of certain cells. The prey remains inside a vacuolar structure called a food vacuole within which food gets digested and absorbed Amoeba http: //www. micrographi a. com/specbiol/protis/h omamoeb/amoe 0100. ht m

Paramecium • 1. How the organism obtains food: – Heterotrophic • 2. How the organism moves: – Cilia • 3. Any unique characteristics: – has a definite shape. Their spindle-shaped body has anterior and posterior ends, although they dart backwards or forwards very swiftly

Paramecium Cilia - Microscopic hair- Cilia are used for like projections extending movement, feeding, or from surface of cell. both. The cilia may They act in unison to occur in rows, move the cell. longitudinal or spiral, or may occur in tufts.

How Obtains Food How It Moves Unique Characteristics Euglena Photosynthetic Autotroph & Heterotrophic Flagella Pigment spot (or stigma), positive phototaxis Volvox Photosynthetic Autotroph Colonial flagellate Colony is made up of many zooids (individuals) organized in hollow ball. Some division of labor exists within colony. Amoeba Heterotrophic; use pseudopods to feed by engulfing the prey and incorporating it into their cytoplasm. Pseudopods (false Have no definite shape or feet) temporary form. extensions of the cell - in any direction. Paramecium Heterotrophic Cilia Has a definite shape. Their spindle-shaped body has anterior and posterior ends, although they dart backwards or forwards

http: //www. micrographia. com/specbi ol/protis/homamoeb/amoe 0000. htm