Download 1. How can reproductive isolation lead to speciation?

1. How can reproductive isolation lead to speciation? If populations cannot mate successfully with one another, genetic differences may accumulate in the populations. Over time they become very different and give rise to new species. 2. What are the similarities and differences between behavioral and temporal isolation? Similarities: both can’t reproduce. Differences: behavioral involves courtship or mating behaviors, where temporal deals with seasons. 3. Why do you think reproductive isolation is considered to be the final stage in speciation? When populations can no longer mate successfully, they are considered 2 different species. 4. Fireflies recognize flash patterns to identify mates of the same species. Suppose a population of fireflies has a mutation that changes the flash pattern. What kind of barrier is this? Behavioral. Flash patterns do not have anything to do with temperature. 5. Which of the following is a geographical barrier that will lead to speciation? a) Two populations of pine trees that reproduce by windblown pollen are separated by a river. b) An earthquake creates a deep canyon that divides a population of small mice. c) An earthquake creates a deep canyon that divides a population of birds. d) A mountain separates two populations of flies. All others can overcome the barrier.