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8 Cards in this Set
- Front
- Back
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What is a niche? |
Is the range of physical and biological conditions in which a species lives and the way the species obtains what it needs to survive. |
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How does competition shape communities? |
By causing species to divide resources, competition helps determine the number and kinds of species in a community and the niche each species occupies. |
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How do predation and herbivory shape communities? |
Predators can affect the size of prey populations in a community and determine the places prey can live and feed. Herbivores can affect both the size and distribution of plant populations in a community and determine the places that certain plants can survive and grow. |
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What are the three primary ways the organisms depend on each other? |
Biologists recognize three main classes of cymbiotic relationships in nature: mutualism, parasitism, and commensalism. Mutualism: to capture prey and protect the anemone from predators. Parasitism: tapeworms live in the intestine of mammals, where they absorb large amounts of their hosts' food. Commensalism: small marine animals called barnacles often attach themselves to a whale's skin. |
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What is the difference between a habitat and a niche? |
A habitat is where an organism or a community of organisms lives, and a niche is the specific place and organism has in an ecosystem. A habitat can help define the niche of a particular creature but cannot describe it entirely. |
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What is a competition? |
When communities compete for resources, such as water, food, mates and places to live and raise their young. |
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What is a keystone species? |
Changes in the population of a single species, that can cause dramatic changes in the structure of a community. |
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why can't two organisms compete if they live in different habitats? |
Because they do not live in the same place. |
