Currently, two of the living elephant species (X and Y) are placed in the genus Loxodonta, and a third surviving species (Z) is placed in the genus Elephas. Assuming this classification reflects evolutionary relatedness, which of the following is the most accurate phylogenetic tree?

#Question id: 10652

#Section 2: Evolution

Which factors (limited space or overcrowding; limited food; Predators; parasite and diseased) tend to act in a density-dependent manner; Tony Sinclair (1989) many studies of density dependence in 51 populations of insects, 82 populations of large mammals, and 36 populations of small mammals and birds. Which of the following observation is most likely true?

a) Insects showed a wide variety of causes of density dependence and no one density-dependent factor was of overriding importance

b) The lesser the amount of available food, the greater the mortality of large mammals

c) Space and social interactions were more important for smaller mammals and birds, because they are more territorial

#Question id: 7453

#General Aptitude

#Question id: 10644

#Section 2: Evolution

There is a species with following feature Good colonizer, reach sexual maturity rapidly, Short-lived, low investment in care for the young

Which of the following above feature showing growth pattern and survival ship curve

#Question id: 4611

#Section 2: Evolution

Given what we know about evolutionary biology, we expect to find the largest number of endemic species in which of the following geological features, which have existed for at least a few million years?

#Question id: 12338

#Section 1: Ecology