&amp;gt;&amp;gt; And there you see, that's the reflex. &amp;gt;&amp;gt; This reflex can tell scientists if the snail has formed the memory. &amp;gt;&amp;gt; The longer the gill and siphon remain retracted that's an indication that it's learned what we taught it. &amp;gt;&amp;gt; An aplysia that has not been given any shocks will respond with a short lived contraction. &amp;gt;&amp;gt; There it's out. &amp;gt;&amp;gt; So is that. &amp;gt;&amp;gt; 11 seconds. &amp;gt;&amp;gt; But an aplysia that was taught to be on guard responds much differently. &amp;gt;&amp;gt; Now there's a reflex. 