Podcast
Questions and Answers
The cohesion species concept is based on the idea that species are maintained by a system of mechanisms that maintain genetic coherence and limit evolutionary change.
The cohesion species concept is based on the idea that species are maintained by a system of mechanisms that maintain genetic coherence and limit evolutionary change.
True (A)
The phylogenetic species concept defines a species as a group of organisms that are very genetically similar without respect to ancestry.
The phylogenetic species concept defines a species as a group of organisms that are very genetically similar without respect to ancestry.
False (B)
The recognition species concept and the cohesion species concept have fewer limitations than the biological species concept.
The recognition species concept and the cohesion species concept have fewer limitations than the biological species concept.
False (B)
According to the cohesion species concept, a species is defined by its potential for cohesion via mechanisms, like mating systems and developmental systems, resulting in the sharing of traits.
According to the cohesion species concept, a species is defined by its potential for cohesion via mechanisms, like mating systems and developmental systems, resulting in the sharing of traits.
The phylogenetic species concept focuses on the potential for phenotypic cohesion among individuals within a species.
The phylogenetic species concept focuses on the potential for phenotypic cohesion among individuals within a species.
The biological species concept uses primarily physical appearance to define a species.
The biological species concept uses primarily physical appearance to define a species.
Morphospecies are identified through the morphological species concept.
Morphospecies are identified through the morphological species concept.
The term 'species concept' refers to the singular, universally accepted definition of a species.
The term 'species concept' refers to the singular, universally accepted definition of a species.
Sexual dimorphism is demonstrated when male and female individuals exhibit different morphological form but still belong to the same species.
Sexual dimorphism is demonstrated when male and female individuals exhibit different morphological form but still belong to the same species.
Sibling species are morphologically similar but can interbreed.
Sibling species are morphologically similar but can interbreed.
The morphological species concept is also referred to as the ecological species concept.
The morphological species concept is also referred to as the ecological species concept.
Polymorphism refers to a species having multiple distinct morphological form.
Polymorphism refers to a species having multiple distinct morphological form.
According to the described content there are 7 major species concepts.
According to the described content there are 7 major species concepts.
The biological species concept primarily relies on geographic isolation and environmental factors to define species.
The biological species concept primarily relies on geographic isolation and environmental factors to define species.
According to the biological species concept, a liger, resulting from a cross between a lion and a tiger, is considered a distinct species.
According to the biological species concept, a liger, resulting from a cross between a lion and a tiger, is considered a distinct species.
The evolutionary species concept is a mechanistic approach that allows direct observation of the birth of a new species within an individual's lifetime.
The evolutionary species concept is a mechanistic approach that allows direct observation of the birth of a new species within an individual's lifetime.
The recognition species concept proposes that all members of a species share a common fertilization system called SMRS.
The recognition species concept proposes that all members of a species share a common fertilization system called SMRS.
A new species arises under the Evolutionary Species Concept only when it acquires a new SMRS
A new species arises under the Evolutionary Species Concept only when it acquires a new SMRS
Asexual organisms, such as bacteria, are well-defined by the biological species concept due to their ability to interbreed easily.
Asexual organisms, such as bacteria, are well-defined by the biological species concept due to their ability to interbreed easily.
The main criteria in the biological species concept are reproductive isolation and shared chromosomes.
The main criteria in the biological species concept are reproductive isolation and shared chromosomes.
The Evolutionary Species Concept suggests that a species is defined by its ability to interbreed with other species and produce fertile offspring.
The Evolutionary Species Concept suggests that a species is defined by its ability to interbreed with other species and produce fertile offspring.
Flashcards
Species Concept
Species Concept
A method of defining or describing a species, based on how scientists think a species should be identified.
Morphological Species Concept
Morphological Species Concept
Identifies species based on their physical characteristics and appearance. Similar looking organisms are considered the same species, while different looking organisms are considered different species.
Sibling Species
Sibling Species
Species that look alike but are not able to interbreed, highlighting a flaw in the morphological species concept where appearance doesn't always reflect reproductive compatibility.
Sexual Dimorphism
Sexual Dimorphism
Signup and view all the flashcards
Polymorphism
Polymorphism
Signup and view all the flashcards
Biological Species Concept
Biological Species Concept
Signup and view all the flashcards
Morphological Differences (Biological Species)
Morphological Differences (Biological Species)
Signup and view all the flashcards
Phylogenetic Species Concept
Phylogenetic Species Concept
Signup and view all the flashcards
Biological Species Concept (BSC)
Biological Species Concept (BSC)
Signup and view all the flashcards
Reproductive Isolation
Reproductive Isolation
Signup and view all the flashcards
Gene Pool
Gene Pool
Signup and view all the flashcards
Species as a Reproductive Community
Species as a Reproductive Community
Signup and view all the flashcards
Species Determination by Distinctiveness
Species Determination by Distinctiveness
Signup and view all the flashcards
Evolutionary Species Concept (ESC)
Evolutionary Species Concept (ESC)
Signup and view all the flashcards
Recognition Species Concept (RSC)
Recognition Species Concept (RSC)
Signup and view all the flashcards
Species-Specific Mate Recognition System (SMRS)
Species-Specific Mate Recognition System (SMRS)
Signup and view all the flashcards
Cohesion Species Concept
Cohesion Species Concept
Signup and view all the flashcards
Mechanisms Maintaining Genetic Cohesion
Mechanisms Maintaining Genetic Cohesion
Signup and view all the flashcards
Mechanisms Preserving Genetic Cohesion
Mechanisms Preserving Genetic Cohesion
Signup and view all the flashcards
Fundamental Niche Limiting Genetic Drift
Fundamental Niche Limiting Genetic Drift
Signup and view all the flashcards
Study Notes
Species Concepts
- Species concept is a way to define or describe species
- Scientists have different criteria for defining species
- Six major species concepts are discussed
Major Species Concepts
-
A. Morphological Species Concept (Typological):
- Species are defined by shared morphology (physical characteristics)
- Similarly looking organisms are considered same species
- Problems: Sibling species (morphologically similar, but don't interbreed)
- Issues: Sexual dimorphism (males and females look different), Polymorphism (species with multiple forms)
-
B. Biological Species Concept:
- Mayr and Dobzhansky proposed this
- Species are groups of actually or potentially interbreeding natural populations reproductively isolated from others
- Reproductive isolation is key criterion
- Common gene pool
-
C. Evolutionary Species Concept:
- Species is a lineage of ancestor-descendant populations
- Maintains its identity from other lineages
- Has its own evolutionary tendencies
- Historical fate
- 6 tenets detailed in text
-
D. Recognition Species Concept:
- Species are populations with shared mate recognition systems
- Organisms share common fertilization system
- Developments in mate recognition system creates new species
-
E. Cohesion Species Concept:
- Species is a population with shared phenotypic cohesion due to mechanisms like fertilization, development, and natural selection
- Maintain genetic cohesion
-
F. Phylogenetic Species Concept:
- Species is irreducible cluster of organisms
- Diagnostically distinct from other clusters
- Shares a common ancestor
- Parental pattern of ancestry and descent
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
