1. Unicellular and Multicellular Organisms

2. Unicellular Organisms  Unicellular organism are one celled living things.  Algae are one celled organisms that contain chlorophyll, and live on or near the surface.  Algae produce most of the O 2 that we breathe.  Algae are microscopic and can not be seen by the naked eye.  The most common forms of Algae are:  Diatoms- make their own food (photosynthesis)  Dinoflagellates- can both make their own food and get food from other sources

3. Diatoms and Dinoflagellates

4. Multicellular Algae  Seaweed are the most common form of multicellular algae.  There are three types of Seaweed:  Red  Brown  Green  Seaweed has leaves for photosynthesis, stems for transport, and roots for absorbing water.  Seaweeds are vascular plants.  There are many species of seaweed and each has its own special adaptation for survival.

5. Seaweeds

6. Summary  Algae produces most of the oxygen that we breathe.  Multicellular algae, or seaweed, is classified in three colors: red, green, and brown.  Unicellular Algae is broken down into two groups Diatoms and Dinoflagellates.  All of these organisms have special and unique adaptations that enable them to survive their environments.  Plankton is a combination of uni and multicellular algae and forms the basis of all life in the ocean.

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