As the giraffe population increased, leaves near the bottoms of trees became scarce.
The animals with longer necks could reach and eat higher leaves.
Giraffes lengthened their necks by stretching to reach higher leaves.
Giraffes that had longer necks were more successful.
2007-04-26 16:51:56 · 5 answers · asked by whatsinaname07 1 in Science & Mathematics ➔ Biology
He would disagree with the statement that "giraffes lengthened their necks by stretching to reach higher leaves."
Darwin's theory of evolution is based on survival of the fittest (i.e. the giraffes with longer necks will be better able to survive because they can reach and eat higher leaves); he (rightly) didn't believe in Lamarck's theory of use and disuse.
2007-04-26 16:55:15 · answer #1 · answered by febreze88 2 · 2⤊ 0⤋
I would have to say the first one. Just seems logic to me. Trees became taller therefore the giraffes seem to get their necks longer to partake of the leaves of taller trees. You have to put the horse in front of the cart to understand. But don't always count those chickens before they hatch. You have to have a starting point. ALWAYS.
2007-04-27 00:15:48 · answer #2 · answered by Anonymous · 0⤊ 1⤋
And about giraffes -- did you know that a giraffe has the same number of vertebrae (7) in his neck as we have in ours? His are just A LOT bigger!
2007-04-26 23:59:29 · answer #3 · answered by Red Ant 5 · 0⤊ 1⤋
The third option. That is a Lemarckian theory which Darwin did not agree with.
2007-04-26 23:56:23 · answer #4 · answered by curious_george 1 · 2⤊ 0⤋
Darwin would disagree with the 3rd statement. Lamarck would agree, though.
2007-04-26 23:57:09 · answer #5 · answered by ecolink 7 · 1⤊ 0⤋