A study of a population of Eastern bearded dragons, Pogona barbata, found that lizards killed by a common predator, dingos, had shorter “beards” than surviving lizards. 1A. Describe how evolution by natural selection on beard length occurs in this population (, 2 sentences). 1B. Explain which type of selection is acting on beard length and why (1 sentence). How could we demonstrate that short beard length is an adaptation? ( 1-2 sentences). 1C. A researcher wants to compare beard length and its effect on predator evasion in bearded dragons. They are going to compare Eastern bearded dragons to a close relative, the Pygmy Bearded Dragon, Pogona henrylawsoni, using the comparative method. Why should the researcher include at least one more species in their study? (2sentences) 2. As an undergraduate, Marcell was required to memorize the attached phylogeny in preparation for the first midterm (and final) of the evolution course at CSULB. Fortunately, you are NOT required to know this tree. Instead, you will use it to answer the following questions in this essay assignment 2A. What phylogeny term learned in lecture would you use to describe the group containing Annelida, Mollusca, and Arthropoda? ( one word). 2B. What phylogeny term learned in lecture would you use to describe the group containing Primates, Lagomorpha, Dermoptera, and Scandentia? (one word) 2C. It may be useful to compare Monotremes to other mammals because Monotremes are the ( one word): 2D. What phylogeny term would you use to describe the internal node between Anura, Amphibia Caudata, and Gymnophiona (one word)?
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