Wings of pigeon, mosquito and bat show
divergent evolution
atavism
convergent evolution
all of these
Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of
The hypothesis that all photosynthetic organisms require a source of hydrogen was first proposed by
Contribution of scientist : Van Helmont
Evolution is defined as