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Unit 2 ecology

Honors bio flashcards Unit 2

QuestionAnswer
What is Ecology? The scientific study of interactions among organisms and between organisms and between organisms and their environment.
Whit is a biosphere? Planet in which all of life exists, including land, water, and oxygen, or atmosphere.
What is a species? A group of organisms so simialar to one another that they can breed and produce fertile offspring.
What is a Population? Groups of individuals that belong to the same species and live in the same area.
what is a Community? Assemblages of different populations that live together in a defined area.
What is an Ecosystem? Collection of all the organisms that live in a particular place, together with their nonliving, or physical environment.
What is an Autotroph? Plants, Algea, and certain bacteria that can capture energy from sunlight or chemicals and use that energy to produce food.
What is a Heterotroph? Organisms that rely on other organisms for their energy and food supply.
What is a Food Web? Network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem.
What is a Trophic level? Each step in a food chain or food web.
What is Biomass? The total amount of living tissue within a given trophic level.
What is a Biogeochemical Cycle? Process in which elements, chemical compounds, and other forms of matter are passed from one organism to another form one part of the biosphere to another.
What is a Limiting Nutrient? Single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem.
What is Weather? The day-to-day conditions of earth's atmosphere at a particular time and place.
What is a Climate? The average year-after-year conditions of temperature and precipitation in a particular region.
What is the Greenhouse Effect? The naturaul situation in which heat is retained by this layer of greenhouse gasses.
What is a Biotic Factor? The biological influences on organisms within an ecosystem.
What is an Abiotic Factor? Physical, or nonliving, factors that shape ecosystems.
What is a Niche? The full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.
What is Logistic growth? Occurs when a population's growth slows or stops following a period of exponential growth.
What is Carrying Capacity? The largest number of individuals.
What is Demography? The scientific study of human populations.
What is Demographic Transition? A dramatic change in birth, and death rates.
What is Green Revolution? The effort of introducing modern agricultural techniques.
What is a Renewable Resource? can regenerate or be replenished depending on if they are nonliving or alive.
What is a pollutant? A harmful material that can enter the atmosphere through the land, air, or water.
What is Biodiversity? The sum total of the genetically based variety of all organisms in the biosphere.
What is Biological Magnification? Concentrations of a harmful substance increase in organisms at higher trophic levels in a food chain or food web.
Created by: benrazin
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