Factors that lead to Reproductive Isolation: Geographical isolation – physical barriers such as rivers or mountains separate a population Temporal Isolation – timing prevents reproduction between a population Behavioral Isolation – differences on courtship or mating behaviors

Identify which type of reproductive isolation is being described below: →Geographical isolation →Temporal Isolation →Behavioral Isolation T ___ 1. The Red-legged Frog breeding season lasts from January to March. The closely related Yellow-legged Frog breeds from late March through May. ___ 2. A mountain range prevents two types of goat from mating, causing the gene pool to become less varied. ___ 3. Female fireflies only flash back and attract males who first signaled to them with a species-specific rhythm of light signals. ___ 4. A forest fire causes the permanent separation of a group of deer from their native population, causing the small group to interbreed only with one another. G B G

Patterns of Evolution: Divergent evolution – the accumulation of differences between related groups Convergent evolution – the accumulation of similarities between unrelated groups Coevolution – the process by which 2 or more species evolve in response to changes in each other.

Are the following pairs examples of divergence or convergence: ___ 1. ___ 2. ___ 3. ___ 4. C D Both Mammals Lives in Water Lives on Land Platypus Duck (Both lay eggs) D C Venomous Rhinosaurus Triceratop Both have horns Nonvenomous