Search found 2 matches

by elvex1
Tue Feb 05, 2013 3:20 am
Forum: Evolution
Topic: On the number of limbs.
Replies: 7
Views: 10327

Re:

Interesting question. I don't have a complete answer, but my guess would be either 1) extra limbs are no great advantage and cost energy or, 2) contingency (that is, things just happened to fall out that way). Gould is famous for having said that if we could "rewind the tape of life" and ...
by elvex1
Mon Feb 04, 2013 6:21 pm
Forum: Evolution
Topic: On the number of limbs.
Replies: 7
Views: 10327

On the number of limbs.

I've been wondering, what does limit the number of limbs?.
For example, nearly all vertebrates are cuadrupedal or have vestigial limbs that add up to 4 limbs, why is it that there are no, let's say, hexapedal ( it would be possible for a, let's say, 4 legs bird? )