TwoOldGuys™ Study Guides
BI-122 Biology
Natural Selection

Natural Selection

predicted event if natural selection were to occur

Macro-evolution

When sufficient changes occur between two populations, and a reproductive barrier develops between the two populations, speciation, or the development of a new species, should occur.
We do not hae any confirmation of this hypothesis, although several instances of putative incipient speciation are being monitored with the expectation that we will confirm it.
Some texts also use the term macro-evolution to describe evolution above the species level. As you will learn in Principes of Biology 2, the taxa above the species level are artificial, so it is less clear how contempory evolution theory should apply to the taxa.



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revised 19 aug 2006