A star fish with six arms may be a case of
Variation
Evolution
Autotomy
Mutation
It's Obvious
Darwinism does not explain
Most important condition for origin of life is the presence of
Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of
Flagella of prokaryotic and eukaryotic cells differ in
The origin of seeds in the land plants was achieved about $345 \;million$ years ago, in lineages recognised as ancestral to all more advanced vascular plants in
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