why do our hairs all flow downwards so helps water flow away? why do we have nails on our fingers to help grip? why do we have more hair growth on our heads than anywhere else? why do hair in our nose filter the dirt? where are the flaws? is it evolution? everything on our body is there for a reason, but how did it all start?
2006-10-20 20:04:56 · 7 answers · asked by dennis s 3 in Science & Mathematics ➔ Biology
evolution, features that didn't work faded away. The people or animals that had undesirable traits either couldn't find a mate or died young because they weren't built to withstand the elements.
Darwin's study on hummingbirds in the tropics says it all. Different birds of the same species had different features that helped in their environment. Where the flowers were deep, these hummingbirds had longer beaks.
2006-10-20 20:18:00 · answer #1 · answered by krissy 5 · 0⤊ 0⤋
Natural selection(which does NOT occur based on need, it just happens)...certain traits allowed better survival and were passed on because people without those traits didn't do as well. Over many thousands, if not millions of years we became the creatures we are today. Again, I'm taking evolution into account here...so apelike creatures first and then eventually humans after a very, very, very long time.
2006-10-20 20:09:48 · answer #2 · answered by Shaun 4 · 0⤊ 0⤋
All features of the human body can be explained through evolution, just not readily by a Y(h)amster. Can you imagine situations in which those features would be helpful, and would select for the survival of individuals who had them in larger quantities? All the way from the earliest lipid micelles and organic polymers to present day.
2006-10-20 20:09:40 · answer #3 · answered by jacinablackbox 4 · 0⤊ 0⤋
natural selection
2006-10-20 20:23:38 · answer #4 · answered by Klamidia 2 · 0⤊ 0⤋
these are adaptations ....all organisms try to adapt themselfs according to the environment ..thats why...!
2006-10-20 20:09:36 · answer #5 · answered by nijas . 1 · 0⤊ 0⤋
that shows our creator was a great scientist
2006-10-20 20:15:51 · answer #6 · answered by smart_eluh 4 · 0⤊ 2⤋
ask God....he makes us.Isn't it great
2006-10-20 20:14:50 · answer #7 · answered by Anonymous · 0⤊ 1⤋