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Questions and Answers
What defines a species?
What defines a species?
- A group of organisms that share the same habitat.
- A group of organisms that can survive in any environment.
- A group of organisms which have the ability to interbreed and produce fertile offspring. (correct)
- A group of organisms that are genetically identical.
How is crude density calculated?
How is crude density calculated?
- Number of individuals multiplied by area used.
- Number of individuals per unit area that is actually used.
- Total number of individuals divided by total area. (correct)
- Total area divided by the number of individuals.
Which dispersion pattern is most commonly observed in populations?
Which dispersion pattern is most commonly observed in populations?
- Cohesive dispersion.
- Clumped dispersion. (correct)
- Random dispersion.
- Uniform dispersion.
What does the niche of a species refer to?
What does the niche of a species refer to?
What is ecological density?
What is ecological density?
Flashcards
What is a species?
What is a species?
A group of organisms that can interbreed and produce fertile offspring in natural conditions.
What is population size?
What is population size?
The number of individuals of a species present in a specific area at a given time.
What is population density?
What is population density?
The number of individuals of a species per unit area or volume of habitat.
What is a habitat?
What is a habitat?
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What is a niche?
What is a niche?
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Study Notes
Characteristics of Populations
- Species: A group of organisms that can interbreed under natural conditions and produce fertile offspring.
- Population Size: The number of individuals of a species within a specific area at a given time.
- Population Density: The number of individuals of a species per unit area or volume.
- Crude Density: The number of individuals per total area.
- Ecological Density: The number of individuals per unit of area actually used by the population.
- Habitat: The place where a species normally lives.
- Niche: The role or function of a species within an ecological community.
- Community: All the populations in a given ecosystem at a given time.
- Ecosystem: The living (biotic) and non-living (abiotic) components that function as a unit in a given area or volume.
Population Dispersion
- Clumped Dispersion: The most common pattern, where organisms are clustered or grouped together. This pattern often occurs due to uneven resource distribution or social behaviors.
- Random Dispersion: This pattern occurs when resources are evenly distributed and there is little or no interaction between the organisms.
- Uniform Dispersion: This dispersion pattern is least common in nature; individuals are spaced evenly apart. An example is a farmer planting crops.
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