Why are female birds more likely to be drab while males have fancy colors or especially long feathers? A) Drab colors promote a female's survival. B) Males are under specific pressure to attract a mate. C) Females choose their mate. D) All of these are correct.

Which of these situations offers the lowest “opportunity for selection” for males? A. Females choose mates with a fancy ornament. B. Every female chooses one male to mate with for life. C. Locations that females need access to in order to reproduce are rare. D. Males fight each other for access to groups of females.

27) Which sex does the selecting in Sexual Selection? A) the more attractive sex B) males C) hermaphrodites D) females E) the sex with the greatest investment in the offspring 28) "Population" is best defined as A) individuals that are evolving. H) a geographically localized group of individuals capable of eachanging DNA C) the diverse offspring of a single mating pair. D) one particular species. E) new alleles in the gene pool. 29) The limbic system is involved in which behaviors? A) controlling complex programmed motor movements B) detecting chemicals dissolved in liquids C) mediating sleep/wake cycles D) analysis of sensory information E) learning and memory 30) Human vision is best at detecting A) heat-sources. B) colors and movement. C) distant objects. D) stationary objects at night. E) All of the above. 31) Essential nutrients are those molecules that A) include some amino acids. B) the body cannot manufacture. C) include the vitamins. D) are needed for proper functioning of the…

Which of the following promotes adaptive evolution in populations? A)High genetic diversity B)Selection pressure for an environmental factor that is changing C)Greater survival and reproduction in organisms with inherited traits D)All of the above     At what rate do adaptations occur in populations? A)Adaptations occur slowly, due to very low mutation rates. B)Adaptations occur quickly, due to the ability of organisms to quickly acquire traits from their environment. C)Adaptation rates can be fast when selection pressures are strong. D)Adaptation rates are always slow, due to genetic drift.   Gene flow among populations results in which impact on adaptation? A)It increases the occurrence of adaptation by introducing new genes. B)It slows the process of adaptation by introducing alleles that keep the population from being dominated by the alleles best suited for the environment. C)It increases the occurrence of adaptation by moving traits acquired…

2) If this model continues, with no major changes to the environment, what do you expect to happen? XA) Rabbits will continue to get lighter over time. There is no way to predict because mutations are random. B) edator 9) D) Mutations will all die out leaving only the original fur color. Dark gray fur will become the common phenotype because it favors survival.

Why are Irish setters not black in color?

Which of the following is true about fitness? a) It refers to the physical strength of an individual b) It is determined solely by an individual's genotype c) It is the same thing as survival d) It is the ability of an individual to reproduce and pass on its genes to the next generation

Which of the following best states a condition which promotes natural selection of a species? A)One baby albino alligator, from a nest of 20 eggs, hatches in the Florida Everglades. B)The population of moths in a forest increased from 100 to 150 members. C)An ocean ecosystem consists of more algae than fish species. D)A female cat has a litter of 5 kittens instead of 6.

Scientists have also noticed unusual coloration among certain condor populations. Andean condors are typically black in color.  However, a few unique white feathered individuals have occasionally been noted. These white feathered individuals are not well-camouflaged, and are easily spotted by larger predators.  Recently, scientists noted that a black feathered condor had mated with a white-feathered condor, and their three chicks all appeared to have gray feathers. Closer examination of these condor chicks revealed that the chicks actually possessed a mixture of black feathers and white feathers, giving them a gray appearance from a distance. Please NAME and EXPLAIN the genetic phenomenon described here.