Register | Sign In


Understanding through Discussion


EvC Forum active members: 65 (9162 total)
1 online now:
Newest Member: popoi
Post Volume: Total: 915,817 Year: 3,074/9,624 Month: 919/1,588 Week: 102/223 Day: 0/13 Hour: 0/0


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   Wombat Pouch
frako
Member (Idle past 306 days)
Posts: 2932
From: slovenija
Joined: 09-04-2010


Message 10 of 85 (615562)
05-14-2011 10:34 AM
Reply to: Message 1 by InGodITrust
05-13-2011 3:25 PM


i dont think the "rotation" of the pouch had to be gradual, it could have been a single mutation like when people get a mutation that makes their legs face backwards.
The question is advantage of a backward facing pouch or disadvantage of a forward facing pouch. And what came first? And from what it evolved?
My guess and its a guess i dint read up on it is that the pouch was originally backwards orientated evolving from sexual organs or something similar in the back part of the body.
A ken-guru with a pouch facing backwards would probably have a big problem holding on to his young while jumping around. So my guess is the freedom of jumping around was first enabled by the rotation of the pouch giving the animal more speed while carrying their young giving it a better chance for survival.
All the back pouch facing marsupials never had any selective pressure to turn their pouch around so their pouches stayed facing backwards or at some point even had selective pressures to keep their pouch facing backwards like digging and getting their pouch messy in the process.
This argument is pulled out of my arse so it might be wrong.

This message is a reply to:
 Message 1 by InGodITrust, posted 05-13-2011 3:25 PM InGodITrust has not replied

Replies to this message:
 Message 23 by Dr Adequate, posted 05-14-2011 1:53 PM frako has replied

  
frako
Member (Idle past 306 days)
Posts: 2932
From: slovenija
Joined: 09-04-2010


Message 26 of 85 (615623)
05-14-2011 8:08 PM
Reply to: Message 23 by Dr Adequate
05-14-2011 1:53 PM


Does this actually happen?
Well usually only some joints rarely the whole legs joints like the knee bending forwards instead of backwards
7 Unbelievable Genetic Accidents - Oddee

This message is a reply to:
 Message 23 by Dr Adequate, posted 05-14-2011 1:53 PM Dr Adequate has not replied

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2023 by EvC Forum, All Rights Reserved

™ Version 4.2
Innovative software from Qwixotic © 2024