Levels of Cellular Organization Multicellular Organisms Multicellular Organisms

Levels of Cellular Organization

Multi-cellular Organisms • Multi-cellular – Organisms made of more than one cell. Specialized cells work together to make tissues, organs, and organ systems.

Unicellular Organisms • Unicellular: One celled organism. They must perform all activities within one cell. NO TISSUES, ORGANS, OR SYSTEMS!!

Unicellular vs. Multicellular Similar 1. Carry on all characteristics of life. 2. Have the same MAIN cell parts as multi-cellular organisms. Mitochondria, vacuole, ER, nucleus, ribosomes, chloroplast, Golgi bodies, etc. Except nucleus in Arachebacteria and Eubacteria Different 1. Cells in multi-cellular organisms have a specific job. Unicellular organism must carry on all characteristics of life in one cell. 2. Multi-cellular organisms have tissues, organs, and organ systems. Unicellular organisms DO NOT.

Prokaryotic and Eukaryotic Cells

Which Organelle is Missing?

The Nucleus: What’s so Special? • membrane enclosed organelle found in eukaryotic cells. • contains most of the cell's genetic material (DNA) for reproduction • The function of the nucleus is to control the cells protein production

Lost and Found Project • P. 6 in Science notebook • Concept: Unicellular vs. Multicellular • Must include the differences between prokaryotic and eukaryotic cells • Must describe the function of the nucleus • Paragraphs are to be on the back of poster