In a report by ABC News, the headlines read “City Living Increases Men’s Death Risk” The headlines were based on a study of 3,617 adults who lived in the United States and were more than 25 years old. One researcher said, “Elevated levels of tumor deaths suggest the influence of physical, chemical and biological exposures in urban areas... Living in cities also involves potentially stressful levels of noise, sensory stimulation and overload, interpersonal relations and conflict, and vigilance against hazards ranging from crime to accidents.” Is a conclusion that living in an urban environment causes an increased risk of death justified?

#Question id: 3311

#Section 2: Evolution

Consider a diploid population at Hardy-Weinberg equilibrium. For a locus with two alleles, the frequency of the A1A1 genotype is 0.01) The frequency of A2A2 is

#Question id: 3312

#Section 2: Evolution

Hardy-Weinberg equilibrium, the frequencies of the two alleles A1 and A2 is 0.4 and 0.6. When you consider A2 is dominant allele of genetic disorder. The frequency of defected individuals, in population size 1000 is

#Question id: 3313

#Section 2: Evolution

Which one of the following statement is incorrect for the process of speciation?

#Question id: 3314

#Section 2: Evolution

The body weight of offspring of bird species is range between 12 gm to 18 gm. In a laboratory experiment, species was subjected to selection pressure having influence on the offspring body weight. After many generations of experimental selection pressure, the body weight range between 14 gm to 16 gm. Which of the following natural selection operate on this species?

#Question id: 3316

#Section 2: Evolution

There are two population A (N = 500) and B (N=50). Due to genetic drift, both populations will lose its genetic diversity in a generation. Such losses become magnified over many generations. After 20 generations, what will be lose its original variation?

#Question id: 3317

#Section 2: Evolution

Which of the following statements is NOT correct regarding effect of genetic drift?