By Kenneth J. McNamara

The examine of the heritage of lifestyles encompasses the origins of species to their death: evolution and extinction. in line with reviews of the fossil checklist, this publication examines the directionality of evolution--so referred to as evolutionary trends--a basic element of lifestyles historical past that has bought relatively little cognizance in recent years. as well as describing evolutionary developments, from the intraspecific point to macroevolutionary adjustments in a number invertebrate and vertebrate organisms, this publication units out to give an explanation for simply why organisms have advanced within the path that they have got.

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Evolutionary Trends

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