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Learn the types of organisms and how they are organized, differences between prokaryotic and eukaryotic cells, and the organization of multicellular organisms.
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Topic: Cells Aim: What are the types of organisms & how are they organized? Do Now: Explain two differences between animal and plant cells. http://www.youtube.com/watch?v=gfzVWG2DnQ4 HW: Work on your science fair project!
1.PROKARYOTIC CELL: 2 types of cells
NO NUCLEUS • DNA in cytoplasm • No cell organelles • Ex: bacteria
Anthrax Strep Cholera
HAVE A NUCLEUS • Larger • Contain organelles
1. Unicellular Organism:1-celled organism 2 types of organisms
Ameba Euglena
2. Multicellular Organism: made up of many different cells that work together
Put these structures in the correct order from least complex (simple) to most complex: Tissues Systems Cells Organs Organelles
1. Cells: specialized • Examples:
2. Tissue: group of similar cells that perform a specific function
4. Organ system: group of organs working together to perform a specific function
5. Organism: a combination of organ systems that work together • A living thing
Levels of organization Muscle cell Smooth muscle tissue Stomach Digestive system Cells Tissues Organs System Organism
Let’s summarize… • Explain the difference between prokaryotic and eukaryotic cells. Give examples of each. • Explain the difference between unicellular and multicellular organisms. • Explain the type of cells that make up a multicellular organism. • Explain the organization of an organism.
Did you know… • Bacterial infections can be treated with antibiotics. Strep Staph E. coli
Did you know… • The longest living cells in the body are brain cells which can live an entire lifetime.
Review: 1. Which statement describing the cells in a body system is correct? • Each cell in the system is identical to the other cells in the system, and each cell works independently of the other cells. • Some cells in the system may be different from the other cells in the system, but all cells are coordinated and work together. • Each cell in the system is different from the other cells in the system, and each cell works independently of the other cells. • All cells in the system are identical to each other and work together.
2. Which of the following is a primary difference between prokaryotic and eukaryotic cells? (1) Prokaryotic contain a membrane-bound nucleus. (2) Prokaryotic contain DNA. (3) Eukaryotic cells contain a membrane bound nucleus. (4) Eukaryotic contain DNA.
3. Which sequence represents the correct order of levels of organization found in a complex organism? • Cells organelles organs organ systems tissues • Tissues organs organ systems organelles cells • organelles cells tissues organs organ systems • organs organ systems cells tissues organelles
4. These groups of cells represent different (1) tissues in which similar cells function together (2) organs that help to carry out a specific life activity (3) systems that are responsible for a specific life activity (4) organelles that carry out different functions.
6. Which statement best compares a multicellular organism to a unicellular organism? • A multicellular organism has organ systems that interact to carry out life functions, while a single-celled organism carries out life functions without using organ systems. • A single-celled organism carries out fewer life functions than each cell of a multicellular organism. • A multicellular organism always obtains energy through a process that is different from that used by a single-celled organism. • The cell of a single-celled organism is always much larger than an individual cell of a multicellular organism.
Review: Put the following terms in order from least complex to most complex: Tissue Organism Cell System Organ Organelle
What do prokaryotic cells contain? • What is a cell organelle found in a eukaryotic cell and not in a prokaryotic cell? • Explain the difference between a unicellular and multicellular organism.