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Topic: Cells
Aim: What are the types of organisms & how are they organized?
Do Now: 1. Explain two differences between animal and plant
cells.
2. Watch the video and explain the difference between prokaryotic cells and eukaryotic 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
2.EUKARYOTIC CELLS:
•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
•Cells are SPECIALIZED (have specific jobs)
How are cells in a multicellular organism organized?
1. Cells: specialized•Examples:
– Red blood cells carry oxygen.
–Muscle cells help you move.
2. Tissue: group of similar cells that perform a specific function
Blood cells blood tissue
Muscle cells muscle tissue movement
3. Organ: many tissues working together
Heart =organ made of muscle, nerve & blood tissue
4. Organ system: group of organs working together to perform a specific function
Skeletal & Muscular Systems
Circulatory System
5. Organism: a combination of organ systems that work together
Levels of organizationMuscle cell Smooth muscle tissue Stomach Digestive system
Cells Tissues Organs
System
Organism
Let’s summarize…
1. Explain the difference between prokaryotic and eukaryotic cells. Give examples of each.
2. Explain the difference between unicellular and multicellular organisms.
3. Explain the type of cells that make up a multicellular organism.
4. Explain the organization of an organism.
Did you know…
• Bacterial infections can be treated with antibiotics.
Staph E. coliStrep
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?(1) Each cell in the system is identical to the other cells in
the system, and each cell works independently of the other cells.
(2) Some cells in the system may be different from the other cells in the system, but all cells are coordinated and work together.
(3) Each cell in the system is different from the other cells in the system, and each cell works independently of the other cells.
(4) 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?
(1) Cells organelles organs organ systems tissues
(2) Tissues organs organ systems organelles cells
(3) organelles cells tissues organs organ systems
(4) 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?
(1) 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.
(2) A single-celled organism carries out fewer life functions than each cell of a multicellular organism.
(3) A multicellular organism always obtains energy through a process that is different from that used by a single-celled organism.
(4) 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
1. What do prokaryotic cells contain?
2. What is a cell organelle found in a eukaryotic cell and not in a prokaryotic cell?
3. Explain the difference between a unicellular and multicellular organism.
Put these structures in the correct order from least complex (simple) to most complex:
Tissues
Systems
Cells
Organs
Organelles
