BIOL2010.02 Fall 2018; Week 2 Homework Quiz

One of the ways to think about the value of biodiversity is by considering which can be divided into three categories (provisioning, regulating & maintenance, and cultural). Who is responsible for the hierarchical system of biological classification, much of which is still in use today? Darwin and Wallace's theory of evolution by natural selection was revolutionary because it ________. Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree? Homologous structures arise from independent evolutions that produce similar features. Which of the following statements best summarizes evolution by natural selection as it is viewed today? Many crustaceans (for example, lobsters, shrimp, and crayfish) use their tails to swim, but crabs have reduced tails that curl under their shells and are not used in swimming. This is an example of ________. Similar gill pouches in embryos of a chick, human, and cat are an example of Fossil evidence of a species giant sloth much larger than any known modern sloth species suggests that ________. Which types of selection best describes the process of human domestication of plants, and the fact that many modern food crops look nothing like their wild plant ancestors? Imagine an insect that varies in color from very light to very dark, and that lives on trees that also vary from light to dark. Insects living on trees similar to their own color are less likely to be seen and eaten by predators. Now imagine a disease that wipes out all of the intermediate colored trees, leaving only very light and very dark trees. As a result of this change, insect color evolves as some insects are now more easily consumed, and their color alleles decrease in relative abundance. What type of selection is most likely occurring on insect color? In the same scenario above describing changes in insect color following tree color, what do you predict will happen to the overall amount of variation in insect color? How much time did you spend out of class on this course (reading, studying, reviewing, completing this quiz...) this week? Please give your answer in number of hours, for example 30 minutes would be "0.5", and 5 hours would be "5". This question is for my information and will not influence your grade in any way