Unicellular and Multicellular Organisms

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 O2 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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