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From earliest to latest, the overall sequence of early development proceeds in which of the following sequences?A. first cell division → synthesis of embryo's DNA begins → acrosomal reaction → cortical reactionB. cortical reaction → synthesis of embryo's DNA begins → acrosomal reaction → first cell divisionC. cortical reaction → acrosomal reaction → first cell division → synthesis of embryo's DNA beginsD. acrosomal reaction → cortical reaction → synthesis of embryo's DNA begins → first cell division

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33. Until the middle of the 19th century, all peppered moths (Biston betularia) observed around Manchester,England, were light in color. In 1845, a single black peppered moth was reported. As Manchester became moreindustrialized and dark soot began to cover the bark of the trees, the frequency of black moths increased greatly.The change in proportion of light and dark forms resulted from:A) disruptive selection.B) directional selection.C) decreased population size.D) the ability of moths to change color within their lifetimes.E) increased mutation.

11. If a gene is fixed in a population:A) it cannot undergo mutation.B) one allele exhibits complete dominance over the other allele for that gene.C) only one allele appears for that gene in that population.D) it causes the organism to be infertile.E) it is located near the centromere on the chromosome, reducing its ability to recombine.

41. Which statement is an example of evolution by natural selection that has taken place over the last few decadesin a manner that has allowed scientists to observe the evolutionary process?A) Insect wings evolved by first functioning as thermoregulatory organs before gradually becoming flight organs.B) Many strains of the bacterium Staphylococcus aureus have become resistant to penicillin.C) Blood-sucking bats retained their molars, even though they have a completely liquid diet.D) Honeycreepers in Hawaii have radiated into niches occupied by parrots and hummingbirds in other areas.E) The forelimbs of humans, horses, bats, and porpoises all contain the same bones, even though they are used forvery different functions.

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