2006-10-31 04:48:43 · 6 answers · asked by Sreek n 1 in Science & Mathematics ➔ Biology
This is one of those imponderable questions that is probably impossible to answer. The fact is, it had to be one or the other, and it just happened to go L as a matter of total chance. (A 50:50 mix of L and D would not work, since such proteins derived from said mixture would be all disorganized, kind of like the difference between a Lexus car and a bag of auto parts of similar weight and size. The intact Lexus will work like a finely tuned machine that it is, and the bag of auto parts will just sit there).
It has been long thought that life may have first arisen upon the surfaces of rocks or clays, and there is much scientific literature to support this view. When a molecule is stuck to a surface, it can only react on one side, the outward side, and not the inward side. This leads to favoring one handedness over another, which in turn leads to reliably reproduced molecular structures, rather than the random "bag of bones" molecules that would result in free swimming solution.
Another interesting topic is why are we made of matter and not anti-matter? Also, why does the solar system spin counter clockwise when viewed from the north pole rather than the other way? We may never know the answers to these questions, since it is likely to be simply chance as the cause. The great baseball catcher Yogi Berra once said, "Most of this game is half mental"..... I agree, and therefore most of the rest is therefore non-mental, i.e. total chance.
2006-10-31 05:45:41 · answer #1 · answered by Sciencenut 7 · 0⤊ 0⤋
significant question: i do no longer think that gravity and entropy are in proper stability, gravity is formed from mass, so the greater great an merchandise the greater desirable the gravity. that's a reasonable oversimplification in spite of the incontrovertible fact that it will suffice till you're arranged for relativity yet F = (G*M1*M2)/r^2 the place G is a relentless, M1 and M2 are the two hundreds, r is the area between the two hundreds and F is the strain of allure between the two hundreds. with the aid of fact heavier factors can exist on planets like Jupiter it is plenty greater great than earth the thought is shown to be fake. added information: Our planet IS interior the goldilocks zone there is not any risk approximately it. The earth has one middle and one great moon, there's a barycentre between the earth and moon if that's what you're speaking approximately. The earth has 4 seasons with the aid of fact of its axial tilt no longer something to do with the moon or cores. One sperm cellular + one egg makes one new child, given the proper circumstances.
2016-10-03 03:31:53 · answer #2 · answered by ? 4 · 0⤊ 0⤋
The choosing of the L form was pretty much arbitrary. Some bacteria still use the R form, but the choice to go L was made pretty early in the evolution of life.
2006-10-31 04:53:02 · answer #3 · answered by munkmunk17 2 · 0⤊ 0⤋
Agreement with all above. The choice for sugars, on the other hand (no pun intended), went the other way, and almost all organisms use the dextro sugars.
2006-10-31 05:38:58 · answer #4 · answered by Wally M 4 · 0⤊ 0⤋
It would have had a high "biological cost" to evolve systems dealing with both. Lepto happened to be the one that turned up.
2006-10-31 04:57:16 · answer #5 · answered by oldhippypaul 6 · 0⤊ 0⤋
it's what the body recognizes and can use. the D form is just chucked out as waste
2006-10-31 05:02:22 · answer #6 · answered by shiara_blade 6 · 0⤊ 0⤋