The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions. However, genetic data suggest that all three kinds of organisms diverged from a common ancestor at about the same time. Which of the following is the most likely explanation for these data?

#Question id: 10669

#Section 2: Evolution

The three graphs (A, B, C) show population growth (N) patterns in relation to N or time (t)

Which of the following above graph showing exponential growth?

#Question id: 10670

#Section 2: Evolution

To estimate the number of foxes in an area, a researcher conducted a mark-recapture survey. In the first survey, he caught and marked N number of foxes. In his second survey a week later, he caught 120 foxes of which 90 were unmarked (recaptures). If you are told that the actual number of foxes in this area is 400, what is value of N in this area?

#Question id: 11510

#Section 2: Evolution

Life history trait varies environmental condition, both survivorship and fecundity is habitat dependent in practice but intrinsic rate of increase can change as environmental change. Following life history trait is characteristic of r-selected species?

A) Later age at first reproduction                    B) Long generation time

C) Multiple broods per life spans                    D) Large number of offspring per brood

#Question id: 11511

#Section 2: Evolution

A metapopulation is

#Question id: 11512

#Section 2: Evolution

The mortality rate of organisms following a type iii survivorship curve is

#Question id: 11513

#Section 2: Evolution

Organisms whose life history adaptation is called semelparity