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Populations and Communities
Terms in this set (34)
The struggle between organisms to survive as they attempt to use the same limited resource.
All the members of one species in a particular area.
The nonliving parts of an ecosystem.
A symbiotic relationship in which both species benefit.
The largest population an environment can support.
The community of organisms that live in an area, along with their nonliving surroundings.
A group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce.
Environmental conditions that cause populations to decrease.
A symbiotic relationship in which one species benefits and the other species is neither helped nor harmed.
All the different populations that live together in an area.
The living parts of an ecosystem.
Behaviors and physical characteristics of species that allow them to live successfully in their environment.
An interaction in which one organism kills and eats another organism.
True or False: If a population is very large or spread out, ecologists use the sampling method to estimate the population's size.
True or False: All the different species living in an area form a population.
True or False: An organism's specific role in its habitat is called its niche.
True or False: Every organism has a variety of habitats that enable it to live successfully in its environment.
Levels of organization in an ecosystem. Starting with the smallest unit.
Organism --> Population --> Community --> Ecosystem
Name three populations commonly found in a prairie ecosystem.
Prairie dogs, owls, and worms.
Name four abiotic factors in a prairie ecosystem.
Water, sunlight, oxygen, temperature and soil. (5)
Identify two different habitats in a prairie ecosystem. Name one organism found in each habitat.
The Grassland habitat and the Forage and Cover habitat. Grizzly Bears are found in the Grassland, and Burrowing Owls are found in the Forage and Cover.
The study of how living things interact with each other and with their environment.
All the living and nonliving things that interact in a particular area make up a(n) ______________
The place where an organism lives and that provides the things the organism needs is called its __________
A(n) ____________ is a group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce.
A(n) __________________ includes all the members of one species in a particular area.
All the different populations that live together in an area make up for a(n) ___________
The number of individuals per unit.
The largest population that an environment can support.
Moving in a population.
How does natural selection produce adaptations in a species?
Reproduce and survive.
What is an organism's niche?
How it lives.
How do adaptations enable organisms to reduce competition for food and other resources?
Give an example of a predator-prey relationship and identify which is which.
THIS SET IS OFTEN IN FOLDERS WITH...
Living Things and the Enviroment
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Ecosystems and Biomes
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