Vulnerability to extinction can be linked to species following characteristics. Which of the following statement are correct?

 A. Rare species are more prone to extinction than common ones.

 B. Species that are capable of migrating between fragments of habitat, such as between mainland areas and islands, may be more resistant to extinction

 C. Organisms that are specialists are more likely to go extinct

 D. Species with naturally long life spans may be more likely to become extinct

#Question id: 10623

#Section 1: Ecology

What is the population growth per unit of time when r = 0.50, N = 100 and K = 1000. What is value of per capita growth rate when population growing at maximum rate?

#Question id: 10624

#Section 1: Ecology

Limited resources cause tradeoff between investment in reproduction and survival. There is two Animal species with similar size present at same habitat but different their life history as a following. 

A Species   -   Later age at first reproduction

B Species –    Large clutch size and low survival of offspring and adult

There is above species should be

#Question id: 10625

#Section 1: Ecology

#Question id: 10629

#Section 1: Ecology

Following are density dependent factors

A- Food                            B- space

Which of the following animal and their most important density dependent limiting factor are correct?

#Question id: 10630

#Section 1: Ecology

Following is relation between population size with various strategies of species, following is correct figure? 

#Question id: 10631

#Section 1: Ecology

To estimate the number of foxes m an area, a researcher conducted a mark-recapture survey. In the fast survey, he caught and marked 90 foxes. In his second survey a week later, he caught 120 foxes of which 40 were marked (recaptures). If you are told that the actual number of foxes in this area is 400, which of the following is a plausible explanation for the anomaly in the researcher's data?