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Questions and Answers
Prokaryotic cells contain a defined nucleus surrounded by a membrane.
Prokaryotic cells contain a defined nucleus surrounded by a membrane.
False
All multicellular organisms consist of a single type of cell performing all body functions.
All multicellular organisms consist of a single type of cell performing all body functions.
False
The basic unit of structure and function in living things is the organ.
The basic unit of structure and function in living things is the organ.
False
Unicellular organisms can perform all necessary life functions using a single cell.
Unicellular organisms can perform all necessary life functions using a single cell.
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Eukaryotic cells do not contain membrane-bound organelles.
Eukaryotic cells do not contain membrane-bound organelles.
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Study Notes
Organization of Living Things
- All organisms are made of atoms
- Atoms consist of a central nucleus (positively charged) surrounded by negatively charged electrons and heavier protons and neutrons
- Molecules are formed when atoms bond together
- Molecules combine to form subcellular organelles
- Cells are the basic units of structure and function
Levels of Organization
- Cell: Basic unit of structure and function of living things
- Tissue: Group of cells of the same type that perform the same function
- Organ: Structure composed of two or more types of tissues; works together to perform a specific function (e.g., brain, stomach, kidney, liver)
- Organ system: Group of organs working together to perform a particular function (e.g., skeletal, nervous, reproductive)
- Organism: An individual living thing, made up of one or more organ systems
Classification of Organisms
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A. Based on the Number of Cells
- 1. Unicellular Organisms: Single cells that perform all functions (e.g., bacteria)
- 2. Multicellular Organisms: Consist of many cells, with cells specializing to perform specific functions (e.g., plants, animals)
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B. Based on the Nucleus
- 1. Prokaryotic Cells: No nucleus; genetic material not enclosed by a membrane
- 2. Eukaryotic Cells: Have a nucleus; genetic material enclosed by a nuclear membrane
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Description
Explore the intricate organization of living things in this quiz covering the levels of biological organization, from cells to organisms. Test your understanding of how atoms, molecules, and cells come together to form complex structures in various life forms.
