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the three basic variables that make up the life history of an organism are. the three basic variables that make up the life history of an organism are. a) life expectancy, birth rate, and death rate. b) number of reproductive females in the population, age structure of the population, and life expectancy. c) age when reproduction begins, how often reproduction occurs, and how many offspring are produced per reproductive episode. d) how often reproduction occurs, life expectancy of females in the population, and number of offspring per reproductive episode. e) the number of reproductive females in the population, how often a) choosing how many offspring to produce over the course of a lifetime and how long to live. b) producing large numbers of gametes when employing internal fertilization versus fewer numbers of gametes when employing external c) the emigration of individuals when they are no longer reproductively capable or committing suicide. d) increasing the number of individuals produced during each reproductive episode with a corresponding decrease in parental care. e) high survival rates of offspring and the cost of parental care.. which of the following can contribute to density-dependent regulation of populations?. which of the following can contribute to density-dependent regulation of populations? a) the removal of toxic waste by decomposers b) intraspecific competition for nutrients a) an insect that resembles a twig b) a bu*terfly that resembles a leaf c) a nonvenomous snake that looks like a venomous snake d) a fawn with fur coloring that camouflages it in the forest e) a snapping turtle that uses its to*gue to mimic a worm, thus attracting fish. which of the following is an example of aposematic coloration? c) green color of a plant d) colors of an insect-pollinated flower. which of the following best describes resource partitioning? . a) competitive exclusion that results in the success of the superior species b) slight variations in niche that allow similar species to coexist c) two species that can coevolve to share identical niches