Download e-book for kindle: 30-Second Evolution: The 50 most significant ideas and by Mark Fellowes, Nicholas Battey

By Mark Fellowes, Nicholas Battey

ISBN-10: 1848318413

ISBN-13: 9781848318410

Adapt or die: it’s nature’s most renowned central. yet how does evolution really take place? It’s too gradual to work out, yet it’s occurring throughout you, forever. whether you’re on most sensible of the main phrases - edition? usual choice? Parent-offspring clash? - you continue to want a few context to place them in. From populations to speciation and polymorphism to evolutionary psychology, here’s the one-stop resource for all you must understand. Evolution unlocks the laboratory of lifestyles, dissecting it into the 50 most important themes that offer the lacking hyperlinks to appreciate the traditional world’s four-billion-year ancestry and the method of ordinary choice within which species both adapt in myriad methods - mutation, ingenuity, and intelligence - to satisfy the demanding situations of a altering setting, or die. get to the bottom of the improvement of dwelling organisms, at micro and macro point - from genes to geniuses.

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Additional info for 30-Second Evolution: The 50 most significant ideas and events, each explained in half a minute

Example text

It is clearly desirable to consider the occurrence of as many taxa as possible in either case in order to better understand the environment at any one time, as well as the changing environmental tolerances of organisms. But, it should be made very clear that the co-occurrence of taxa does not necessarily indi- LEVEL-BOTTOM COMMUNITY CLASSIFICATION 29 cate that they are dependent or interdependent. Proof of dependence relations requires an understanding of the functioning of organisms, not just their distribution patterns.

LlA). Consideration of the implications and consequences of these associations suggest that the defining of communities as recurring associations of fossils3 is not necessarily a simple matter. llA as a guide) that the recurring associations of our single taxon by itself, and in various combinations with other taxa tells us something about the environmental tolerances of all of the taxa. For part of their geographic range the individual taxa are exclusive because of limiting environmental factors, whereas in other portions of their ranges they share different environmental requirements in common with other taxa.

More importantly, however, it may turn out that some of the non-brachiopod taxa are distributed in such a manner as to suggest that they belong to separate communities controlled by different combinations of environmental factors, thus making up separate although superimposed communities. N o attempt has been made t o consistently consider the effect of bottom sediment type. Present information shows conclusively that there is no correlation between the mineralogy of the enclosing rock and the taxa LEVEL-BOTTOM COMMUNITY CLASSIFICATION 33 of brachiopod present; brachiopods obviously lack the ability to discriminate mineral species.

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30-Second Evolution: The 50 most significant ideas and events, each explained in half a minute by Mark Fellowes, Nicholas Battey

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