Elevated carbon dioxide levels have been shown to contribute to the greenhouse effect, resulting in an increase in mean global temperature. Ecosystems where the largest warming has already occurred include snow-covered northern coniferous forests, tundra, and arctic sea ice habitats. Which statement best explains how the elimination of ice-covered ecosystems affects the rise or fall in global temperature?

#Question id: 3365

#Unit 9. Evolution & Diversity of Life Forms

Consider a population of 10,000 individuals, of which 2500 are homozygotes (PP) and 3000 are heterozygotes (Pp) genotype. The frequency of allele p in the population is

#Question id: 3366

#Unit 9. Evolution & Diversity of Life Forms

Red-Green color blindness is an X-linked recessive disorder. In a population which is in the Hardy-  Weinberg equilibrium, the incidence of occurrence of this in males is 2:2000. What will be the expected incidence of affected homozygous females?

#Question id: 3367

#Unit 9. Evolution & Diversity of Life Forms

The largest unit within which gene flow can readily occur is a

#Question id: 3368

#Unit 9. Evolution & Diversity of Life Forms

The origin of a new plant species by hybridization, coupled with accidents during nuclear division, is an example of

#Question id: 3369

#Unit 9. Evolution & Diversity of Life Forms

Genetic drift refers to random changes in allele frequencies over time leads to following consequence

a. Loss of genetic diversity per generation   

b. change in allelic frequency just by chance 

c. It caused adaptive evolution

d. It one allele may reach to 0 frequency

#Question id: 3370

#Unit 9. Evolution & Diversity of Life Forms

One thousand independent populations of Drosophila are established with 25 individuals in each population, of which, one individual is of Aa genotype and the other nine are of AA genotype. If random genetic drift is the only mechanism acting on these populations, then, after a large number of generations, the expected number of populations fixed for the "a" allele is