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.
Convergent Evolution' is shown by
homologous organs
analogous organs
vestigial organs
all of the above
Which of the following statements is correct
Lion and leopard show convergent evolution.
Cryptic camouflage is seen in Biston betularia
Natural selection is responsible for extinction of dinosaurs.
Homo habilis and Homo erectus are closely related.
Analogous structures are a result of
convergent evolution
shared ancestry
stabilising selection
stabilising selection
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
Select the wrong statement:
the viroids were discovered by D.J. Ivanowski
W.M. Stanley showed that viruses could be crystallized
The term 'contagium vivum fluidum' was conined by M.W. Beijerinek
The term 'contagium vivum fluidum' was conined by M.W. Beijerinek
The wings of a bird and the wings of an insect are:
homologous structures and represent divergent evolution
analogous structures and represent convergent evolution
phylogenetic structures and represent divergent evolution
phylogenetic structures and represent divergent evolution
