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why are agricultural fields often less stable than natural communities in the similar areabecause agricultural fields usually having one species of
name three effects that inbreeding can have on a population inbreeding can decrease the number of offspring produced increase susceptibility to
what evidence did charles elton collect that suggested that fluctuations in hare and lynx populations were related what other evidence shows that
what would happen to the energy flow through an ecosystem if the decomposers were eliminated without decomposers the nutrients kept in the bodies
give three reasons why energy transfer between trophic levels is not 100 percentsome of the organisms in a trophic level escape being eaten some
why are producers the first trophic level to advantage from the activity of decomposersdecomposers return nutrients in dead tissues and wastes to the
how could knowledge of a pest organisms tolerance limits be used in pest controlpesticides could be developed that make those limits narrower
define why the virginia opossum is considered a generalist and the koala is considered a specialistthe opossum feeds on almost anything whereas the
give three examples of abiotic factors and explain how they interactabiotic factors contain temperature humidity ph salinity o2 concentration amount
how might the destruction of large areas of tropical rain forest have world-wide consequencesas plants consume co2 during photosynthesis extensive
how does a population differ from a communitya population having of all members of a single species that live in an area while a community consists
why do ecological models commonly have limited applications the applications of ecological models are limited due to the models are normally very
how does the production of acorns by oak trees affect lyme disease in humans when more acorns are produced by oak trees the populations of mice
another possible way to classify organisms would be to separate them into unicellular and multicellular organisms explain why this is not a useful
what characteristics distinguish fungi from plantsfungi contain some unicellular forms but plants do not most plants are autotrophic but all fungi
how do derived characters help cladistic taxonomists determine phylogenetic relationships a derived character is found only between members of a
list three types of evidence used by systematic taxonomists to construct phylogenetic diagramstypes of evidence contain the morphology of fossil and
how were the classification systems of aristotle and linnaeus similar both systems divided all living things into two major groups animals and
describe two pieces of evidence indicating that speciation does not always occur at the same ratesome species of moths on the hawaiian islands appear
if a cow develops a preference for eating white four oclock flowers and ignoring pink and red four oclock flowers what type of selection is being
why is genetic homozygosity dangerous to a nearly extinct species genetic homozygosity leaves no variation for natural selection to act onthus a new
give three examples of artificial selection include examples of both animals and plants answers will vary but could include domestic cats
what is adaptive radiationadaptive radiation happens when a new population in a new environment like an island undergoes divergent evolution until
why do vestigial structures persist in modern organisms explain the evidence that indicates that species evolve over timethe environment will not