Questions and Answers
What are the seven levels of the Linnaean classification system starting from the most inclusive?
Kingdom, Phylum, Class, Order, Family, Genus, Species
What is binomial nomenclature?
A system used to name a species of a particular organism.
Why do scientists classify organisms?
To give each organism a specific name and make them easier to study.
What are some challenges of the Linnaean classification system?
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What are the three domains of life?
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What are the six kingdoms of life?
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What must be true for organisms to be considered the same species?
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Which of the following are types of selection?
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What is reproductive isolation?
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What is speciation?
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What is a clade?
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Study Notes
Linnaean Classification System
- Seven levels of classification: Kingdom, Phylum, Class, Order, Family, Genus, Species.
- Humans fall into the following categories: Animalia (Kingdom), Chordata (Phylum), Mammalia (Class), Primates (Order), Hominidae (Family), Homo (Genus), Homo sapiens (Species).
Binomial Nomenclature
- A system for naming species using two parts.
- Generic name (genus) and specific epithet (species) form the complete scientific name.
Purpose of Classification
- Classification assigns specific names to organisms based on binomial nomenclature.
- It simplifies the study of organisms and enhances understanding upon classification.
Challenges of Linnaean System
- Aesthetically based classifications can misrepresent relationships between species.
- Contemporary classification methods utilize DNA analysis for more accurate groupings.
Three Domains of Life
- Domains include Bacteria, Archaea, and Eukarya.
- Bacteria reproduce asexually, Archaea have a unique rRNA base sequence, and Eukarya primarily reproduce sexually.
Six Kingdoms of Life
- Archaebacteria: Prokaryotic, asexual reproduction.
- Eubacteria: Prokaryotic, asexual reproduction.
- Protista: Eukaryotic, mostly asexual with some meiosis.
- Fungi: Eukaryotic, sexual or asexual reproduction via spore formation.
- Plantae: Eukaryotic, utilize photosynthesis for nutrient acquisition.
- Animalia: Eukaryotic, reproduce sexually.
Venn Diagram of Domains
- A visual representation that depicts shared features and unique characteristics among the three domains.
Definition of Species
- Defined as closely related organisms that can interbreed and produce fertile offspring.
Types of Selection
- Three types of natural selection include:
- Stabilizing selection: favors intermediate traits.
- Directional selection: favors one extreme trait.
- Disruptive selection: favors both extreme traits.
Reproductive Isolation
- Refers to conditions preventing interbreeding between different species despite living in the same area.
- Essential for speciation, leading to the development of new species through distinct gene pools.
Speciation
- The evolutionary process through which populations evolve to become distinct species.
Cladograms
- Tools illustrating evolutionary relationships among organisms based on shared common ancestry.
- Cladograms include nodes (shared ancestors), derived characters (shared traits), and clades (evolutionary branches).
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Description
Test your knowledge on the Linnaean classification system and the definitions of key biological terms. This quiz covers the seven levels of classification and specific categories for humans, as well as other foundational concepts in biology relevant to 3B core curriculum.
