9 In your study of a new bacterial species you have identified a transducing phage that you call Px. In addition you have worked out methods to make random transposon insertions into the bacterial genome. You have generated two different transposon insertion collections one with 105 random Tn5 (Kanr) insertions and the other with 105 random Tn10 (Tetr) insertions. You grow Px phage on the mixed collection of Tn5 insertions and use the resulting phage lysate to infect the mixed collection of Tn10 insertions. You select 10,000 Kanr  transductants and find that 80 of them are Tets. Use this information to estimate the total size of the bacterial genome assuming that both Tn5 and Tn10 insert randomly and that the average size of a fragment recombined into the recipient genome during Px transduction is 55 kbp. (Tn5 is about 5 kbp and Tn10 is 10 kbp.)

#Question id: 4702

#Unit 11. Evolution and Behavior

Which of the following is correct match?

#Question id: 4703

#Unit 11. Evolution and Behavior

Within a few weeks of treatment with the drug 3TC, a patientʹs HIV population consists entirely of 3TC-resistant viruses. How can this result best be explained?

#Question id: 4704

#Unit 11. Evolution and Behavior

About thirteen different species of finches inhabit the Galápagos Islands today, all descendants of a common ancestor from the South American mainland that arrived a few million years ago. Genetically, there are four distinct lineages, but the thirteen species are currently classified among three genera. The first lineage to diverge from the ancestral lineage was the warbler finch (genus Certhidea). Next to diverge was the vegetarian finch (genus Camarhynchus), followed by five tree finch species (also in genus Camarhynchus) and six ground finch species (genus Geospiza). If the six ground finch species have evolved most recently, then which of these is the most logical prediction?

#Question id: 4705

#Unit 11. Evolution and Behavior

Darwin and Wallace's theory of evolution by natural selection was revolutionary because it ________.

#Question id: 4706

#Unit 11. Evolution and Behavior

Which of the following statements best explains why modification or change in an organ or tissue during the lifetime of an individual is not inherited?

#Question id: 4707

#Unit 11. Evolution and Behavior

For which one of the following observations were both Lamarck's hypothesis and Darwin's hypothesis in complete agreement?