2006-12-05 03:43:00 · 5 answers · asked by Adnan 1 in Science & Mathematics ➔ Biology
There are two species of squirrels that live on the two sides of the grand canyon. One lives on the north rim, one lives on the south rim. Before the grand canyon formed, there was one specie that lived on both sides of the river. The canyon separated the populations, and they each evolved separately, eventually becoming 2 species.
2006-12-05 03:53:48 · answer #1 · answered by hcbiochem 7 · 0⤊ 0⤋
Macroevolution could involve humans evolving from fish, if you really want to go back... birds from dinosaurs, whales from a shared ancestor with the hippo, etc. Macroevolutionary processes are very long scale, you look for them in the fossil record. And they abound!
2006-12-05 04:30:58 · answer #2 · answered by kiddo 4 · 0⤊ 0⤋
a macroevolutionary change is one that can be witnessed over many many years. An example of this would be humans acquiring the ability to be bipedal animals.
2006-12-05 03:47:32 · answer #3 · answered by Justin F 1 · 0⤊ 0⤋
If you look at Pliocene seashells from the fossil pits in Florida, you find many species which are similar to, but not identical to the species living in the same area today. They are similar enough that you can easily identify the genus, yet it is apparent that there are significant differences, sufficient to justify species separation.
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2006-12-05 04:41:28 · answer #4 · answered by PaulCyp 7 · 0⤊ 0⤋
Al Gore he went from a walking Tree Stump to a sheet of Pacific Northwest Plywood ... Pressboard rather.
2006-12-05 03:56:00 · answer #5 · answered by baltic072 3 · 0⤊ 0⤋