BIOL 2400 Exam Questions And Answers

BIOL 2400 Exam Questions And Answers Life History Traits - ANS traits related to fitness (reproduction and survival of offspring) sex role reversal - ANS a change in the typical behavior patterns of males and females, as when, for example, females compete for access to males or when males choose selectively among potential mates Miscarriage, cannibalism - ANS Organisms may regulate the number of offspring to maximize fitness via ___________ and ____________. Alter the Sex Ratio - ANS Depending on the conditions a female may _______________ of her offspring Females - ANS Mothers produce more __________ in poor conditions Males - ANS Mothers produce more ___________ in good conditions senescence (aging) - ANS decline in physiological function with age decreases, decreases - ANS survival rate generally __________ after reproductive success _____________ disposable soma hypothesis - ANS the hypothesis that senescence results from a necessary trade off between investment in reproduction and investment in repair Selection Shadow - ANS Selection cannot "see" deleterious mutations whose effects are confined to late ages and these harmful mutations will have already been passed on to offspring mother hypothesis of menopause - ANS risks associated with reproduction at older age selects for reduced fertility; investment in current offspring rather than having more offspring - is generally not supported grandmother hypothesis of menopause - ANS loss of fertility associated with a shift in investment to grandchildren instead of their own offspring fecundity, lifetime reproductive success - ANS If the grandmother is alive, her offspring have increased _______________ and ______________. Speciation - ANS Formation of new species