Which of the following strategies would most rapidly increase the genetic diversity of a population in an extinction vortex?

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#Question id: 15620

#SCPH06 I Botany

Wild type E. coli metabolizes the sugar lactose by expressing the enzyme ß-galactosidase. You have isolated a mutant that you call lac1–, which cannot synthesize ß-galactosidase and cannot grow on lactose (Lac–). During an condition Lac– strain, called lac3–, is linked to the Tn5 insertion. From a strain carrying the Tn5 insertion and lac3– mutation you isolate an F’ that caries a region of the chromosome that includes both Tn5 and the linked Lac region. Introduce this F’ into an F– strain carrying lac1– by selecting for Kanr. These merodiploids express ß-galactosidase normally. What does this result tell you about the relationship between the lac3– and lac1- mutations?  

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#Question id: 5206

#SCPH06 I Botany

A microarray known as a GeneChip, with most now known human protein coding sequences, has recently been developed to aid in the study of human cancer by first comparing twothree subsets of cancer subtypes. What kind of information might be gleaned from this GeneChip to aid in cancer prevention?

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#Question id: 5244

#SCPH28 | Zoology

Transformation can used to map bacterial gene, which of the following statement is correct?

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#Question id: 5545

#SCPH06 I Botany

The placenta functions as a(n):

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#Question id: 1623

#I Life Science/ Life Sciences Group – I-V

Which of the following is a complement component that is strongly chemotactic for neutrophils?