Pаrt 4: Essаy Questiоn (Select 1, 20 pоints). Pleаse select ONE оf the following questions and answer all parts in the box provided. PLEASE INDICATE WHICH QUESTION AND SECTION OF THE QUESTION THAT PART OF YOUR ANSWER DEALS WITH. Please use detailed examples in your answer and answer appropriately for the points allotted. 1. Reproductive isolation: a. How common is reproductive isolation among species in the natural world (i.e., without direct human intervention)? (5 points) (note: this is asking about reproductive isolation which is in essence the opposite of hybridization)b. Is reproductive isolation more common in plants or animals? Describe your answer in terms of an evolutionary explanation for why it might be more common in one than the other (3 points)c. Answer ONE of the questions below (12 points): i. In Chapter 11, we discussed behavioral isolation as a mechanism for maintaining existing species barriers as well as beginning the isolation process for speciation (evolution of new species). Describe the studies that were done by the Grant’s research team to understand behavioral isolation in relation to the mating patterns of finches. How do these results help us to understand the speciation event observed in medium ground finches (Grant and Grant 2009)? OR ii. In 1966, Lewontin and Birch presented an example of rapid range expansion in the Mediterranean fruit fly. From the 1850’s to the 1950’s, this species moved from the Australian rainforest across the Australian continent. As they moved from warmer to cooler weather, they adapted quickly allowing them to expand their range. What hypothesis has been presented for how this rapid range expansion occurred? How well supported is this hypothesis? 2. Understanding speciation and adaptation: a. Discuss the three major steps in the process of speciation. Given what you know about this process, what step in the process of speciation do you think the finches on Daphne are in? Defend your answer. (10 points total (6 points for steps, 4 points for finches)). b. How do Dr. Dolph Schluter’s studies with sticklebacks separate out the two competing hypothesis for species distributions and explain the differences that we see today among both the sticklebacks and the finches (i.e., the hypothesis of competitive exclusion versus the random colonization hypothesis)? Be sure to describe each hypothesis in your answer and discuss the contribution of the different types of studies. (10 points)