sSNAKESs : Reptile Forum

Go Back   sSNAKESs : Reptile Forum > Community Forums > General Discussion


Closed Thread
LinkBack Thread Tools Display Modes
Old 12-26-03, 10:22 PM   #46 (permalink)
Mr.Lizard's Avatar
Join Date: Jun-2003
Location: Florida
Age: 53
Posts: 249
Send a message via ICQ to Mr.Lizard
I've read a few books by Gould. He has a lot of intriguing evidence and ideas. His ideas on punctuated equilibrium make a lot of sense...more sense to me than the inexorable change of one species into a new and improved form.
Personally,I believe in the idea of genetic memory and that genetic memory is responsible for "taking notes" on the environment,making an evaluation of it and then using this evaluation as a blueprint with which to build new structures or modify existing ones to perform new tasks.
There is a vast storehouse of genetic combinations previously used in the the organism's ancient ancestry with which it can use to redesign or invent with.
This same idea applies in the far more rapid and fluid evolution of someone's mind. You collect memories all throughout your life and use these memories collectively to form new ideas---using these ideas you can build and invent what you can conceive.
One of Gould's books---"Hen's Teeth and Horse's Toes" talks about the collection of characteristics stored in this genetic warehouse. The book's title refers to the ability of organisms to draw upon ancestral characteristics,for the better or otherwise.
In the book he describes how unborn chicks can be induced to grow teeth simply by providing them with the necessary material.
The blueprint already exists,merely the material required for making teeth was not needed for any other reason than teeth so it was given up-----"use it or lose it". In fact,early species of birds did have teeth,hesperornis( a diving bird),archeopteryx and others. Another interesting characteristic of some birds is their ability to grow claws on their wings similar in at least one species to archeopteryx. The hoatzin of S. America,as a juvenile nesting in the trees over rivers is provided with these claws with which it climbs up the tree when it has fallen out or fled it's nest.
As the bird matures and becomes capable of flight these fingers are absorbed by the body. Interestingly enough,you can still find a vestigial thumb claw on a plucked chichen wing. While the other four fingers have become fused.Unlike the teeth,the material for making the thumb claw is still in use to produce claws upon the feet. Note also the retained clasper claws in some boids.
The horse also retains an unused "thumb" which can be seen on the inside of the foreleg. In rare instances known as atavisms,this other toe is present next to the single toe which the horse walks upon.This goes back to the horse's ancestry when it was once used. In fact,at some point in embryonic developement five digits can be discerned in many vertebrate species...pigs,whales,birds.
Sorry if I digressed a bit,one of my favorite subjects is the mechanism of evolution.
Some other good reads are "Jurassic Park" and the "Lost World" by Michael Crichton.They're sci-fi of course but there's a lot of real science put into these books. H.G. Wells' "Time Machine" is another on which touches on evolution a bit.


V.salvator 0.1

German Tour Guide: You vill find more on Germany's contributions to ze arts in ze pamphlets ve have provided.
Brian Griffin: Yeah, about your pamphlet... uh, I'm not seeing anything about German history between 1939 and 1945. There's just a big gap.

----Family Guy---
Mr.Lizard is offline  
Old 12-27-03, 07:16 PM   #47 (permalink)
Crotalus75's Avatar
Join Date: Nov-2003
Posts: 199
I like the genetic memory idea. Organisms have a large percentage of DNA that is not used to code for proteins (introns). Wouldn't it be interesting to find that these unused portions had some role in evolution and adaptation by holding necessary genetic information? Just a stray thought.
~ Tad Wood ~
Crotalus75 is offline  
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -6. The time now is 08:14 AM.

Powered by vBulletin®
©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright © 2002-17, Hobby Solutions Inc.


SEO by vBSEO 3.1.0