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