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Questions and Answers
What is the basic category of classification for living organisms?
What is the basic category of classification for living organisms?
- Class
- Species (correct)
- Order
- Genus
Which of the following characteristics is NOT used for the classification of living organisms?
Which of the following characteristics is NOT used for the classification of living organisms?
- Presence of a backbone (correct)
- Shape of the animal
- Arrangement of veins in a leaf
- Number of wings
Which modern technique assists in classifying organisms by examining their similarities at the molecular level?
Which modern technique assists in classifying organisms by examining their similarities at the molecular level?
- Molecular DNA structure analysis (correct)
- Phenotypic observation
- Electron microscopic techniques
- Taxonomic hierarchy
What does a greater similarity in DNA structure indicate about two organisms?
What does a greater similarity in DNA structure indicate about two organisms?
Which classification method relies on observable traits such as hairiness or the number of legs?
Which classification method relies on observable traits such as hairiness or the number of legs?
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Study Notes
Classifying Living Organisms
- Organisms are categorized into groups based on similarities and differences.
- Observable traits like leg count, wings, antennae, hair, shape, and vein patterns in leaves or insect wings are used for basic classification.
Modern Classification Techniques
- Scientists utilize internal structures, developmental patterns, life cycles, and electron microscopy for more detailed classification.
- DNA analysis is a crucial tool in modern classification.
- Organisms with similar DNA structures are considered more closely related.
Species
- The species is the fundamental unit of classification.
- A species comprises organisms with shared ancestry, similar physical features, and the capacity to interbreed and produce fertile offspring.
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