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4.1 and 4.2 Vocab

NAME _______________________________
Across
groups of organisms that can potentially interbreed to produce fertile offspring.
formed by populations of different species living together and interacting with each other.
heterotrophs that obtain organic nutrients from detritus by internal digestion.
heterotrophs that obtain organic nutrients from dead organisms by external digestion.
square or rectangular plot of land, a quadrat, marked off at random to isolate a sample and determine the percentage of vegetation and animals occurring within the marked area. (2 words, no space)
an organism that uses solar energy or chemical energy to manufacture the organic compounds it needs as nutrients from simple inorganic compounds obtained from its environment.
an experimental tool that brings a small part of the natural environment under controlled conditions.
statistical test of the fit between a theoretical frequency distribution and a frequency distribution of observed data for which each observation may fall into one of several classes.
Nutrient chemical elements, compounds, and other substances necessary to sustain life processes that are not chemically carbon-based.
heterotrophs that feed on living organisms by ingestion.
community of different species interacting with each other and with the chemical and physical factors making up the non-living environment.
Down
the total mass of living matter within a given unit of environmental area, expressed in terms of living or dry weight per unit area.
attributes in an ecosystem that refer to living organisms.
a feeding hierarchy in which organisms in an ecosystem are grouped into trophic (nutritional) levels and are shown in a succession to represent the flow of food energy and the feeding relationships between them. (2 words, no space)
when members of different species breed together.
the position in a food chain occupied by a group of organisms with similar feeding modes. (2 words, no space)
a group of organisms of the same species who live in the same area at the same time.
communities that are capable of being maintained at a steady level without exhausting natural resources or causing severe ecological damage.
the non-living physical and chemical attributes of a system, for example light or temperature in an environment.
formed by populations of different species living together and interacting with each other.