Ecologists are particularly concerned about pathogens because

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#Question id: 5410

#General Aptitude

The arithmetic mean of a set of 50 numbers is 40. If two numbers, namely. 75 and 55, are discarded , the mean of the remaining set of numbers is:

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#Question id: 33337

#Unit 2. Cellular Organization

Which of the following protein forms a spiral structure on the inner surface of the cytoplasmic membrane and oscillates back and forth from pole to pole? 

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#Question id: 13115

#Unit 2. Cellular Organization

Match the correct one -

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#Question id: 12616

#Unit 10. Ecological Principles

In the logistic equation

  

is a measure of the population's intrinsic rate of   increase. It is determined by which of the following?

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#Question id: 15621

#Unit 13. Methods in Biology

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. If the merodiploid were Lac–, 

a) the two mutations lie in the different gene.

b) Both mutation are complement each other

c) the two mutations lie in the same gene.

d) Both of the mutations is dominant to wild type.

what could you conclude about the relationship between the lac3– and lac1– mutations from  these statements?