BCH4024 072425 OC Su25 E3 Q2: A 4-year-old boy is evaluated for developmental delay, aggressive behavior, and self-injurious actions such as biting his lips and fingers. His parents report that he has also had episodes of joint swelling and reddish-orange crystals in his diaper. Laboratory tests reveal markedly elevated serum uric acid levels. Genetic testing confirms a diagnosis of Lesch-Nyhan syndrome. Which of the following enzyme is most directly impaired in this patient?

When is the coefficient of variation most appropriate to use as a measure of dispersion?

Which quartile is equivalent to the median of a data set?

1) Alicia: – El verano pasado, mi amigo Miguel [answer1] camarero.

If a score is at the 80th percentile, what does this mean?

Which measure of central tendency is most affected by extreme values (outliers)?

3) What do the girls tell Javier?

2) Mis abuelos y yo ___________ pizza en la playa.

Short Answer Section (2 points each): Five questions are listed below. For full credit, you must answer three of the questions. If you choose to answer more than three, you will be given bonus points for each correct additional answer. Describe a vestigial structure and give one example. Name two types of fossils and briefly describe each of them. What is the main difference between vertebrates and invertebrates? Give an example of each category. Briefly describe the concepts of natural selection and descent with modification. What purpose did each concept serve for Darwin’s discoveries? What does it mean when an organism has a complete digestive tract? Name one category (phyla) of an animal that has a complete digestive tract.

All of the following are types of fossils except: