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SURVIVING IN THE PHYSICAL ENVIRONMENT
THE DOMAINS OF MALTHUS AND DARWIN
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amount animals answer appears areas become behavior biological birds butterflies called carried cause chance checkerspot chemical closely communities competition containing course determine dinosaurs distributions diversity ecologists ecology ecosystems eggs energy entire environment evidence evolution evolutionary evolved example experiments explain extinction feed females fishes flowers forest genes genetic growing habitat herbivores human important increase individuals insects interesting island kinds known land larger leaves less live look major males mammals mating move natural nutrients observed occur offspring organisms patterns pest physical plants population possible predators prey problem produce question range rates reason relatively remains reproduction result selection Serengeti sexual sexual reproduction similar simple single social soil species successful temperature territories theory tion trees turn understand units usually young