Question Answer
The study of the relationships between living things and their surrounds. Ecology
The zone of air, land, and water of the planet that is occupied by organisms. Biosphere
All living (Biotic) and non-living (abiotic) things in a designated area. Ecosystem
All living organisms in an ecosystem. Community
The number of individuals of ONE SPECIES within a community. Population
An individual member of a species. Organism
Ecological or environmental areas that are inhabited by a particular species of animal, plant or other type of organism. Habitat
The role an animal plays in the habitat. Niche
A division of the world's vegetation that corresponds to a defined climate and is characterized by specific types of plants and animals. Biome
(species diversity) is known as the “variety of life”, and it is always changing. The greater the richness and species numbers, the more sustainable (lasting) the ecosystem. Biodiversity
Describes close and often long-term interactions between different biological Species. Symbiosis
A dependent relationship that benefits both organisms. Mutualism
A dependent relationship that neither helps nor harms the host. Commensalism
A dependent relationship that harms the host. Parasitism
Refers to more-or-less predictable and orderly changes in the composition or structure of an ecological community. Ecological Succession
Succession that begins from bare rock. Primary Succession
Succession that begins from soil. Secondary Succession
The first species that inhabit an area. Pioneer Species
Species that begin to form when soil is rich enough and deep enough to support larger species of plants (which in turn provide animal species with varied shelters). Intermediate Species
Ecosystems that have reached equilibrium (a stable state where very few large changes are taking place). Climax Community
Sometimes ecosystems are affected by plants or animals that are non-native to the ecosystem, and when introduced to it, can cause the ecosystem harm. Invasive Species

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