In the primate family, man is the one with the biggest brain and the largest sex organs.
I don't think evolution would give us alot of this stuff for no apparent reason. I don't believe in coincedences either.
Which came first?
2006-09-06 10:47:05 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Biology
your question assumes one had to come first over the other, this is not an a priori given.....they certainly could have developed concurrently
2006-09-06 10:52:37 · answer #1 · answered by sweetpea 1 · 1⤊ 1⤋
It's not a matter of what evolution gives us, it's a matter of who survives, and what traits they carry.
In primitive humans, 'organ' size may have been a denotation of dominance in tribes. (Biggest = alpha male.) The alpha is the most likely to reproduce, and to reproduce often, so his 'endowment' characteristics are more likely to be passed on to future generations.
On the same token, the more complex and creative a primitive humans brain is, the more likely he will be able to adapt to the shifting circumstances to life in the grasslands of Africa. The most adaptive survive, survivors have children, thus the 'smarts' characteristics have a greater tendency to be passed on.
2006-09-11 01:55:21 · answer #2 · answered by jigokusabre 7 · 0⤊ 0⤋
I've read a lot in this area and come across a lot of speculation but no real answers. Hey, it all happened so long ago that there may never be conclusive evidence. My guess, though, is they they are all related...the big brain, the opposable thumb, the loss of oestrus and the joy of sex.
2006-09-06 17:55:57 · answer #3 · answered by keepsondancing 5 · 0⤊ 0⤋
Actually, w.r.t. testicle size, we are NOT the biggest, but right in the middle. Gorillas are much smaller (1 ounce), chimps are much larger (4 ounces) despite being smaller than us. Humans and orangutans are right in the middle (1.5 ounces).
The reigning theory is something called "sperm competition." In very monogamous animals (like gorillas), the male's sperm does not have to compete with that of other males. In extremely promiscuous animals (like chimps), where females may mate with more than one male in a short period, a high sperm count increases a male's chances of propagating his genes. Humans and orangutans are right in the middle of the range of monogamous to promiscuous (remember, we are talking about the bulk of human evolution, not the social norms of the last few hundred years).
So there's no correlation between size of testicles and brain.
See source below.
2006-09-06 21:51:42 · answer #4 · answered by secretsauce 7 · 2⤊ 0⤋
Natural biological evolution fails at all levels except for those species numbering more than about one quadrillion individuals with generation times less than three months and body sizes smaller than one centimeter.
http://www.reasons.org/
2006-09-10 03:11:09 · answer #5 · answered by mrpink 2 · 0⤊ 1⤋
10,000 years from now men will be 4 feet tall (but 6 feet Long... ;) ) with heads the size of beach balls. Our hearts will be twice their current size to pump all that blood needed to run either aforementioned feature.
Women will have to evolve too. Not gonna answer what I think THEY will look like.......
2006-09-06 17:53:08 · answer #6 · answered by Cabhammer 3 · 0⤊ 1⤋
Its simple natrual selection... what breeds more beats out what breeds less... end of story.
2006-09-06 17:52:19 · answer #7 · answered by D bone 2 · 0⤊ 1⤋
at earth of course
2006-09-13 08:49:34 · answer #8 · answered by david w 5 · 0⤊ 0⤋