bio test one midterm review – Flashcards
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what converts organic matter to inorganic matter by breaking down dead organisms
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decomposers
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what nutrients often limit the distribution and abundance of photosynthetic organisms
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nitrogen and phosphorous
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if a populations growth rate decreases as the population size approaches the carrying capacity the populations growth follows a ______ model
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logistic
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competition among individuals of the same species is _____ competition
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intraspecific
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small fishes that eat zoo plankton are
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secondary consumers
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what factor operates in a density dependent matter
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food supply
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on average what percentage of the energy in one trophic level becomes incorporated into the next higher trophic level
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10%
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the rate at which an ecosystem's producers convert solar energy ti chemical energy stored in biomass is called
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primary productivity
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what name is given to the seafloor
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benthic realm
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species that exhibit a equilibrial life history typically
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have long lives
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the single greatest threat to biodiversity comes from
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habitat destruction and fragmentation
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eating more beef and pork would increase your carbon fottprint. t or f
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true
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what is a population
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a group of organisms of the same species living i a particular geographic area
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opportunistic species typically
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have a large number of offspring
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the greenhouse effect causes an increase in global temperatures. this increase is primarily due to
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CO2 and other greenhouse gases slowing the escape of heat from earth
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in the food chain grass-antelope-human-lion the antelope is
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both a herbivore and a primary consumer
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the sahara desert and the negev desert belong to the same
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biome
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what is one way in which energy flow differs from chemical cycling
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energy flow is unidirectional, and chemical elements can be recycled
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in order to assess the species diversity of a community you would need to know the number of different species present as well as
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the relative abundance of the different species
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as a result of a disturbance a community will
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undergo succession
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type 1 survivorship curves are typical of species that exhibit
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few offspring and good parental care
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what biome is maintained by fire
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chaparral and savanna
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in n aquatic ecosystem what name is given to the region where photosynthesis can occur
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photic zone
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the major abiotic reservoir for phosphorous is
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rock
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______ is the maximum population size that a particular habitat can support
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carrying capacity
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why are most trophic levels limited to three to five trophic levels
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there is insufficient energy to support more trophic levels
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species found in only one place on earth are called
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endemic
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if you study how two species of finches compete for food you are trying to answer a question about
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community ecology
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a regional assemblage of interacting ecosystems is a
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landscape
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small areas that have a large number of endangered and threatened species are referred to as
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biodiversity hotspots
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which of these organisms convert atmospheric nitrogen gas to a form that can be utilized by plants
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bacteria
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the international release of a natural enemy to attack a pest population is called
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biological control
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the endangered species act aims to protect species that
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are in danger of extinction
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what are estuaries
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a transition area between river and the ocean
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integrated pest management advocates
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mixed-species plantings and rotating crops
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the ecological footprint of the united states shows
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that americans consume a disproportionate amount of food and fuel
