Term
| What can cause a population to grow? |
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Definition
| increased reproduction, less predators |
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Term
| What does a limiting factor do? |
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Definition
| It limits the growth of a population |
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Term
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Definition
| When a population reaches a state where it can no longer grow. |
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Term
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Definition
| A gradual change in the plant & animal communities in an area. |
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Term
| Give an example of a pioneer species |
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Definition
Moss/Lichen
the first to move into a barren area |
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Term
| What is a secondary succession and what can trigger it? |
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Definition
| Takes place after a major disturbance in a stable ecosystem |
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Term
| Two examples of how organisims may interact with each other in an ecosystem |
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Definition
sharing food
sharing water
living in the same place |
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Term
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Definition
| Small plants compete for light beside larger plants/trees |
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Term
| What happens when two species act in mutualism & give an example. |
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Definition
They act in a way that is good for both of them (win-win)
Rhino & Tick Bird |
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Term
| How are species affected in commensalism and give an example? |
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Definition
One species gains and one is not affected.
Fish & Jellyfish |
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Term
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Definition
One species gains; one is harmed
dog & flea |
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Term
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Definition
| A group of living things that are so closely related that they can breed with one another and produce offspring that can breed was well. |
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Term
| The difference between a species and population |
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Definition
| The difference between a species and population is that a populatioin exists within a certain boundary. A species may exist in may places worldwide |
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Term
| How does a boundary define a population? |
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Definition
| members are within the boundary |
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Term
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Definition
| The natural home or physical location of a population |
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Term
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Definition
| The species' role in a habitat |
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Term
| What things about an animal show us its niche |
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Definition
what it does
how it lives
what it eats
what it uses
what EATS it |
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Term
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Definition
| Many populations that interact in one area |
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Term
| The 5 Levels of an Environment |
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Definition
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organism: most specific level, a single individual (one gazelle)
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population: total number of species (herd of gazelle)
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community: live in the same area (wildebeests, gazelles, lions)
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ecosystem: the community of ogranisms along with abiotic factors (streams, gazelles, trees, grass, wildebeests, lions, mountains)
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biome: climate and types of plants in similar places (grassland)
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Term
| How does living in a large herds meet animals' needs? |
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Definition
| It protects them fro predators |
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