In  the  territorial  behavior  of  the  stickleback  fish,  the  red  belly  of  one  male  elicits  attack  from  another  male  by functioning as

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#Question id: 12959

#Section 5: Applied Ecology & Evolution

Ozone layer depletion, since the 1970s, is primarily

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#Question id: 12960

#Section 5: Applied Ecology & Evolution

The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years.

Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.

Fitness is a measure of the reproductive success of a particular genotype. The highest fitness is 1.00.

Which of the following is most likely correct concerning the gene for resistance to warfarin? 

TLS Online TPP Program

#Question id: 12687

#General Aptitude

 If the diagonals of two squares are in the ratio of 2 : 5, their area will be in the ratio of

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#Question id: 16842

#General Aptitude

Bolt from the blue

TLS Online TPP Program

#Question id: 16843

#General Aptitude

Blue blood

TLS Online TPP Program

#Question id: 16844

#General Aptitude

At Loggerheads