|
Variation in populations and natural selection alone cannot explain the great diversity of species on the earth. Though it was the title of his book, Darwin didn't really explain the origin of species. His theory of natural selection explained how populations became better adapted to their environments, but not how new species developed.
Jot down the answers to these questions:
 |
| • | What is a biological species? |
|
| • | How can one species, such as the hypothetical pollenpeeper, adaptively radiate into different species? |
|
| • | What conditions contribute to speciation in a localized area? |
|
| • | In what different ways might species become reproductively isolated (unable to reproduce fertile offspring)? |
|
|
