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NATURAL SELECTION
A characteristic that makes an individual better suited to its environment may eventually become common in that species
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ADAPTATIONS
The behaviors and physical characteristics that allow organisms to live successfully in their environments
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NICHE
- The role of an organism in its habitat, or how it makes its living
- The niche includes the type of food the organism eats, how it obtains its food, & which other organisms use the organism as food
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WHAT ARE 3 TYPES OF INTERACTIONS AMONG ORGANISMS?
- 1. Competition
- 2. Predation
- 3. Symbiosis
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COMPETITION
Struggle between organisms to survive as they attempt to use the same limited resources
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PREDATION
An interaction in which one organism kills another for food
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PREDATOR
An organism that does the killing
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PREY
The organism that is killed
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WHAT IS THE EFFECT OF PREDATION ON POPULAR SIZE?
Populations of predators and their prey rise and fall in related cycles
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WHAT ARE SOME EXAMPLES OF ANIMAL ADAPTATIONS?
PLANT ADAPTATIONS?
Running fast, tentacles of poison, stingers, big eyes, mimicry, protective covering, camouflage, and false coloring
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SYMBIOSIS
A close relationship between two species that benefits at least one of the species
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WHAT ARE 3 TYPES OF SYMBIOSIS?
- 1. Mutualism
- 2. Commensalism
- 3. Parasitism
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MUTUALISM
A relationship in which both species benefit
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COMMENSILISM
A relationship in which one specie benefits and the other is neither helped nor harmed
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PARASITISM
Involves one organism living on or inside another organism and harming but not killing it
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PARASITE
- The organism that benefits in a parasitic relationship (usually smaller than the host)
- Example: Fleas, ticks, leeches, and tapeworms
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HOST
The organism that a parasite lives on or in. The host is harmed by the parasite.
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