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Biology Martin

BIology flash cards

QuestionAnswer
What is ecology? The scientific study of interactions among organisms and between organisms and their environment.
What is a biosphere? Part of Earth in which life exists including land, water, and air or atmosphere.
What is a species? A group of similar organisms that can breed and produce fertile offspring.
Define population. A group of individuals of the same species that live in the same area.
What is a community? An assemblage of different populations that live together in a defined area.
What is an ecosystem? A cfollection of all the organisms that live in a particular place, together with their non-living environment.
Define autotroph. AN organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer.
Heterotroph. An organism that contains energy from the foods it consumes; also called a consumer.
Food web. A network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem.
Trophic level. A step in a food chain of food web.
Biomass. The total amount of living tissue withing a given trophic level.
Biogeochemical Cycle. A process in which elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another.
Limiting Nutrient. A single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem.
Weather. The condition of earth's atmosphere at a particular time and place.
Climate. The average, year-after-year conditions of temperature and precipitation in a particular region.
Green House Effect. The natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gasses.
Biotic Factor. Biological influence on organisms within an ecosystem.
Abiotic factor. Physical, or nonliving, factor that shapes an ecosystem.
Niche. Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.
Logistic Growth. A growth pattern in which a population's growth rate slows or stops following a period of exponential growth.
Created by: jackiechankicksu
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