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Evolutionary 'Big Bang' Created Florist's Paradise
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8
11-27-2007 7:21 AM
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tags:
flowers
,
evolution
,
angiosperm
,
plants
,
biology
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11-27-2007
7:41 AM
debbyski
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/6dbaf88f-e3e1-47a3-93b1-8e7df9b5fbb7/CD355783-8EB8-4169-8847-23E2F8DFF3D3/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.livescience.com/environment/071126-flower-tree.html" href="http://www.livescience.com/environment/071126-flower-tree.html" style="font-size: 11px;">www.livescience.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/environment/071126-flower-tree.html"><P> From the ubiquitous daisy to the fantastical orchid, flowering plant species are as diverse as they are numerous. Turns out, these bloomers went through an evolutionary "Big Bang" of sorts some 130 million years ago, a brief era of explosive floral diversification at a time when dinosaurs walked the Earth. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/environment/071126-flower-tree.html"><P> The origin of flowering plants called angiosperms has long baffled scientists, with <A href="http://www.livescience.com/php/multimedia/imagegallery/igviewer.php?imgid=475&gid=33&index=0">Charles Darwin</A> famously referring to the plant puzzler as an "abominable mystery." </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/environment/071126-flower-tree.html"><P> "One of the reasons why it's been hard to understand evolutionary relationships among the major groups of flowering plants is because they diversified over such a short time frame," said researcher Robert Jansen, professor of integrative biology at the University of Texas at Austin. </P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.livescience.com/environment/071126-flower-tree.html">The results show a stunning diversification occurred within a period of 5 million years just after the plants first appeared on the scene and gave rise to today's five major lineages of <A href="http://www.livescience.com/imageoftheday/siod_041101.html">flowering plants</A>. </blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/CD355783-8EB8-4169-8847-23E2F8DFF3D3/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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