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G7 ch3.1 levels of organization
This document discusses levels of biological organization from unicellular to multicellular organisms. It describes prokaryotes as unicellular organisms without nuclei and eukaryotes as unicellular organisms with nuclei and organelles. Multicellular organisms are made of many eukaryotic cells that differentiate and specialize in structure and function. Through cell differentiation, multicellular organisms develop from a single fertilized egg cell into diverse cell types organized into tissues, organs, and organ systems that work interdependently.
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Introduces levels of organization in biology, focusing on unicellular and multicellular organisms.
Discusses unicellular organisms, characteristics of life, and distinguishing between prokaryotes and eukaryotes.
Describes multicellular organisms, cell differentiation, and the origin from a single fertilized egg.
Explains the process of cell differentiation and specialization, leading to various cell types.
Describes animal stem cells, highlighting differences between embryonic and adult stem cell functions.
Discusses plant stem cells, termed unspecialized cells, and their role in growth and development.
Defines tissues and organs, explaining how groups of tissues perform specific functions in plants.
Introduces plant organ systems, the interaction between systems, and the dependency of organs on each other.
Summarizes the key concepts covered in the presentation and outlines homework for further practice.
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Similar to G7 ch3.1 levels of organization
G7 ch3.1 levels of organization
- 1. Levels of Organization Chapter3 Lesson 2 p.96-105
- 3. Organization of Unicellular Organisms Dounicellular organisms have all the characteristics of life? (i.e. respond to environment, get rid of waste, grow, reproduce)
- 4. Prokaryotes • Without amembrane bound nucleus • Smaller than eukaryotic cells • An organism the is a prokaryotic cell is called a prokaryote • Some can live in extreme environments
- 5. Eukaryotes • Nucleus surrounded bya membrane • Specialized organelles • Eukaryotes
- 6. Multicellular Organisms Organisms madeup of many eukaryotic cells working together.
- 7. Cell Differentiation • Ina multicellular organism there are many types of cells. • Each type of cell has a specific job, or function
- 8. All multicellular organismsstart from one cell – a fertilized egg
- 9.
- 11. • By reading differentparts of a chromosome, cells become different types.
- 12. Cell differentiation • Theprocess by which cells become different types of cells
- 13. Animal Stem Cells •Stem cell – unspecialized (undiffentiated) cell that is able to develop into many cell types.
- 14. • Embryos havemany more stem cells than adult organisms.
- 15. • Adult organismshave some stem cells for muscle repair and producing blood cells in our bone marrow.
- 18. Plant Cells • Stemcells in plants are called unspecialized cells • They group in areas called meristems
- 20. • Cells inthe meristem can become parts of the stem, leaves, flowers, or roots.
- 21.
- 22.
- 23. Organs • Organs aregroups of different tissues working together to perform a particular job.
- 24. Plant Organs • Leavesare organs specialized for photosynthesis.
- 26. Organ Systems • Organsystems are grouped of different organs that work together to complete a series of tasks
- 27. Plant Organism Systems •Two major organ systems: – 1. shoot system – 2. root system
- 28. Organisms • Each organsystem depends on the others and cannot work alone. • Muscle tissue could not work without blood from the circulatory system.
- 29. Review • All unicellularorganisms carry out all the activities necessary for survival within one cell • Cells become specialized in structure and function during cell differentiation • Organs are groups of different tissues that work together to perform a job.
- 30. Homework • Practice Book:p19-20 • Notebook: – TB page 105 • #1-5