<?xml version="1.0" encoding="utf-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/">
<channel>
<title>AgnosticWeb.com - Epigenetics revisited</title>
<link>https://agnosticweb.com/</link>
<description>An Agnostic&#039;s Brief Guide to the Universe</description>
<language>en</language>
<item>
<title>Epigenetics revisited (reply)</title>
<content:encoded><![CDATA[<p>Is this epigenetics or evolution? Antifreeze in a beetle in Alaska, tolerating temperatures down to -105 F!:-http://www.sciencedaily.com/releases/2009/12/091214131134.htm</p>
]]></content:encoded>
<link>https://agnosticweb.com/index.php?id=2824</link>
<guid>https://agnosticweb.com/index.php?id=2824</guid>
<pubDate>Tue, 29 Dec 2009 16:35:42 +0000</pubDate>
<category>Introduction</category><dc:creator>David Turell</dc:creator>
</item>
<item>
<title>Epigenetics revisited (reply)</title>
<content:encoded><![CDATA[<blockquote><blockquote><p>This article shows a newly-discovered defense mechanism, adding methionine in a random fashion to newly produced proteins, confusing the invaders:&amp;#13;&amp;#10;&gt; &gt; &amp;#13;&amp;#10;&gt; &gt; <a href="http://www.sciencedaily.com/releases/2009/11/091125134701.htm&amp;#13;&amp;#10;&gt;">http://www.sciencedaily.com/releases/2009/11/091125134701.htm&amp;#13;&amp;#10;&gt;</a> David, &amp;#13;&amp;#10;&gt; &amp;#13;&amp;#10;&gt; Going deeper into the article, it talks a little more about epigenetics as a whole--and this underlines a point I&amp;apos;ve tried and failed to make in the past:  epigenetics is a mechanism for change, but that change only gets transferred to future generations in one way.  How does epigenetics then &amp;quot;prove&amp;quot; Darwin wrong?  (Science isn&amp;apos;t about &amp;quot;proving,&amp;quot; i hate that word in any non-math context.) -It doesn&amp;apos;t prove Darwin wrong. It shows that organisms come provided with self-protective genetic mechanisms that can respond much faster than waiting for a chance mutuation; the epigenetic trick, such as point methylation in DNA, didn&amp;apos;t just pop up recently. It has been there all along. Again, designed to be present or developed by the ususal chance mutation and natural selection theory? &amp;#13;&amp;#10;&gt; &amp;#13;&amp;#10;&gt; Classical theory simply states that genetic changes are passed to offspring in one way... epigenetics would provide an elegant solution to the perceived speed problem.  Perceived because I haven&amp;apos;t actually seen a substantial argument to dictate what the &amp;quot;speed&amp;quot; of evolution *should* be.  -Of course you are referring to mutation rate vs. time. Epigenetics helps is quickly need minor varfiations. Nothing explains the Cambrian Explosion or the Plant Bloom.</p>
</blockquote></blockquote>]]></content:encoded>
<link>https://agnosticweb.com/index.php?id=2694</link>
<guid>https://agnosticweb.com/index.php?id=2694</guid>
<pubDate>Thu, 03 Dec 2009 14:19:38 +0000</pubDate>
<category>Introduction</category><dc:creator>David Turell</dc:creator>
</item>
<item>
<title>Epigenetics revisited (reply)</title>
<content:encoded><![CDATA[<blockquote><p>I have to ask on this one;  as any time chance is invoked it piques my curiosity.  &amp;#13;&amp;#10;&gt; &amp;#13;&amp;#10;&gt; The mechanism in question works by random selection;  so is the randomness designed or is it truly random?    How on earth could you tell the difference?-The real question is whether the mechanism that creates the random placement of methionine is designed. Random placement confuses the attackers; it is effective? Did it develop step by step, or was there a pre-coded message in DNA to start the random mechanism up when needed?</p>
</blockquote>]]></content:encoded>
<link>https://agnosticweb.com/index.php?id=2693</link>
<guid>https://agnosticweb.com/index.php?id=2693</guid>
<pubDate>Thu, 03 Dec 2009 14:04:01 +0000</pubDate>
<category>Introduction</category><dc:creator>David Turell</dc:creator>
</item>
<item>
<title>Epigenetics revisited (reply)</title>
<content:encoded><![CDATA[<blockquote><p>This article shows a newly-discovered defense mechanism, adding methionine in a random fashion to newly produced proteins, confusing the invaders:&amp;#13;&amp;#10;&gt; &amp;#13;&amp;#10;&gt; <a href="http://www.sciencedaily.com/releases/2009/11/091125134701.htm&amp;#13;&amp;#10;David,">http://www.sciencedaily.com/releases/2009/11/091125134701.htm&amp;#13;&amp;#10;David,</a> -Going deeper into the article, it talks a little more about epigenetics as a whole--and this underlines a point I&amp;apos;ve tried and failed to make in the past:  epigenetics is a mechanism for change, but that change only gets transferred to future generations in one way.  How does epigenetics then &amp;quot;prove&amp;quot; Darwin wrong?  (Science isn&amp;apos;t about &amp;quot;proving,&amp;quot; i hate that word in any non-math context.)  -Classical theory simply states that genetic changes are passed to offspring in one way... epigenetics would provide an elegant solution to the perceived speed problem.  Perceived because I haven&amp;apos;t actually seen a substantial argument to dictate what the &amp;quot;speed&amp;quot; of evolution *should* be.  And before you (or anyone else) jumps on me about calculated mutation rates, I will remind that those are always specific to a particular species, thus, there&amp;apos;s enough mathematical variation that we cannot infer back to the beginning of life.</p>
</blockquote>]]></content:encoded>
<link>https://agnosticweb.com/index.php?id=2692</link>
<guid>https://agnosticweb.com/index.php?id=2692</guid>
<pubDate>Thu, 03 Dec 2009 13:57:31 +0000</pubDate>
<category>Introduction</category><dc:creator>xeno6696</dc:creator>
</item>
<item>
<title>Epigenetics revisited (reply)</title>
<content:encoded><![CDATA[<p>I have to ask on this one;  as any time chance is invoked it piques my curiosity.  -The mechanism in question works by random selection;  so is the randomness designed or is it truly random?    How on earth could you tell the difference?</p>
]]></content:encoded>
<link>https://agnosticweb.com/index.php?id=2690</link>
<guid>https://agnosticweb.com/index.php?id=2690</guid>
<pubDate>Thu, 03 Dec 2009 13:51:31 +0000</pubDate>
<category>Introduction</category><dc:creator>xeno6696</dc:creator>
</item>
<item>
<title>Epigenetics revisited</title>
<content:encoded><![CDATA[<p>This article shows a newly-discovered defense mechanism, adding methionine in a random fashion to newly produced proteins, confusing the invaders:-http://www.sciencedaily.com/releases/2009/11/091125134701.htm</p>
]]></content:encoded>
<link>https://agnosticweb.com/index.php?id=2679</link>
<guid>https://agnosticweb.com/index.php?id=2679</guid>
<pubDate>Sat, 28 Nov 2009 14:45:49 +0000</pubDate>
<category>Introduction</category><dc:creator>David Turell</dc:creator>
</item>
</channel>
</rss>
