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Questions and Answers
Which level of organization ranks immediately above the cellular level?
Which level of organization ranks immediately above the cellular level?
Which statement accurately describes prokaryotic cells?
Which statement accurately describes prokaryotic cells?
What is the term used to describe the collective group of all individuals of a species living within a specific area?
What is the term used to describe the collective group of all individuals of a species living within a specific area?
What is an example of a macromolecule that carries genetic information?
What is an example of a macromolecule that carries genetic information?
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Which of the following levels of biological organization is directly above the level of organs?
Which of the following levels of biological organization is directly above the level of organs?
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What distinguishes eukaryotic cells from prokaryotic cells?
What distinguishes eukaryotic cells from prokaryotic cells?
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Which statement best describes a community in ecological terms?
Which statement best describes a community in ecological terms?
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Why are viruses not considered living organisms?
Why are viruses not considered living organisms?
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What encompasses all living things and their interactions with the abiotic components in a specific area?
What encompasses all living things and their interactions with the abiotic components in a specific area?
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Which component is NOT part of the biosphere?
Which component is NOT part of the biosphere?
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Study Notes
Levels of Organization of Living Things
- Living things are organized in a hierarchy from smallest to largest: chemical, cellular, tissue, organ, organ system, and organism.
- Chemicals are the most fundamental unit.
- The smallest unit of matter is the atom.
- Atoms bond to form molecules.
- Molecules combine to form larger complex structures called macromolecules.
- Examples of macromolecules include DNA, which has instructions for all living organisms.
Molecules and Macromolecules
- A molecule is a chemical structure consisting of two or more atoms held together by chemical bonds.
- Many molecules are biologically important macromolecules.
- Macromolecules are typically formed by polymerization.
- Polymerization involves combining smaller units (monomers) to create larger molecules.
- Deoxyribonucleic acid (DNA) is an example of a macromolecule.
Cells and Organelles
- Cells are the basic structural and functional units of living organisms.
- Some cells contain organelles, which are small structures within cells.
- Organelles have specific functions, such as producing energy (mitochondria) or making sugars (chloroplasts).
- Cells are the smallest units that exhibit all characteristics of life.
Tissues, Organs, and Organ Systems
- Tissues are groups of similar cells that perform a specific function.
- Organs are collections of tissues that work together to perform a complex function.
- Organ systems are groups of organs working together to perform an even broader set of tasks necessary for the organism.
Organism
- Organisms are individual living entities.
- Single-celled organisms or multicellular organisms.
Populations
- A population includes all the members of a species living in a defined area.
Communities
- A community consists of all the populations of different species living and interacting within a particular area..
Ecosystems
- An ecosystem includes all the living organisms (biotic factors) in a particular area and the non-living environment (abiotic factors) .
Biosphere
- The biosphere is the highest level of organization.
- The biosphere includes all ecosystems on Earth.
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Description
This quiz explores the hierarchical organization of living things, from atoms to organisms. You'll learn about the structure and function of molecules and macromolecules, including DNA. Test your knowledge of cells and organelles in living organisms.
