SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Politics : PRESIDENT GEORGE W. BUSH
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: DMaA who wrote (24903)7/19/2000 7:44:30 PM
From: TigerPaw  Read Replies (1) of 769667
 
Eyes,
First of all, you exagerate the problem. There aren't billions of genes in the whole human much less those that build the eyes. The steps range from simple light sensors, such as the part of your arm in the sunlight feeling warmer than the part in a shadow (especially effective if you have a sunburn). It is a few steps away from light/dark sensors such as those found in a scallop or clam. These are just sensitive enough to tell the top of the water from the bottom. The light receptive chemicals of an eye are very similar to the photosynthetic chemicals found in plants and have been available in the genome for billions of years.

cs.colorado.edu
This chart shows the particular steps that primitive fish underwent to evolve their eyes (and utimately humans evolved from fish). They eye is quite old in the family tree.

TP
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News