According to Darwin, the organic evolution is due to
intraspecific competition
interspecific competition
competition within closely related species
competition within closely related species
B.
interspecific competition
Darwin stated that the organic evolution is due to interspecific competition. it is the competition between members of different species. Intraspecific competition occurs amongst members of the same species for obtaining optimum amounts of their food, shelter, mate, water, light, species etc. Closely species compete cannot cause evolution. Reduced feeding efficiency in one species due to the presence of interfering species is due to strugle for existance.
Which of the following structures is homologous to the wing of a bird?
Wing of a moth
Hind limb of a rabbit
Flipper of whale
Flipper of whale
Following are the two statements regarding the origin of life
I. The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
II. The first autotrophic organisms were the chemoautotrophs that never released oxygen.
Of the above statement which one of the following options is correct?
II is correct but I is false
Both I and II are correct
Both I and II are false
Both I and II are false
The process by which organisms with different evolutionary history evolve similar to a common environmental challenge is called
natural selection
convergent evolution
non-random evolution
non-random evolution
The tendency of population to remain in genetic equilibrium may be disturbed by
random mating
lack of migration
lack of mutations
lack of mutations
