BIOL 1001 WEEK 4 EXAM 1 – QUESTION AND ANSWERS 2021

BIOL 1001 WEEK 4 EXAM 1 – QUESTION AND ANSWERS • Question 1 3 out of 3 points Match each model of life on earth in column 1 with its description in column 2. o Question Correct Match Static Model d. Species arise separately and do not change over time. Separate types c. Species do change over time and new species can arise, but each group of species derives from a separate ancestor that arose independently. Transformation a. Species arise separately but do change over time to adapt to the changing environment. Common descent b. Species do change over time to adapt, and new species can arise. All species derive from a common ancestor. • Question 2 3 out of 3 points In land mammals, the pelvic girdle serves to connect the legs to the rest of the skeleton. Whales have a small residual pelvic girdle that does not attach to anything. This is an example of _________. Correct Answer: e. All of the above • Question 3 2 out of 2 points Phenotypic features that are coded for by several genes, such as eye color in humans, are called: Correct Answer: e. Polygenic • Question 4 2 out of 2 points Evidence for evolution includes: Correct Answer: e. All of the above • Question 5 3 out of 3 points How could two parents with curly hair (a dominant condition) have boys and girls with straight hair (a recessive condition)? Correct Answer: b. The recessive condition could happen if both parents were heterozygous carriers of the recessive allele. • Question 6 2 out of 2 points In humans, heterozygotes are referred to as ________, particularly when the recessive allele is associated with a genetic disease. Correct Answer: d. Carriers • Question 7 2 out of 2 points Dihybrid crosses involve ________ trait(s). Correct Answer: c. 2 • Question 8 3 out of 3 points What is the role of fossils in supporting the theory of common descent? Correct Answer: e. There have been many fossils of intermediate types discovered that provide strong support for the theory of common descent. • Question 9 3 out of 3 points Bat wings are homologous to the front legs of cats. What does the term homologous mean in this context? Correct Answer: d. The limbs share a common set of bones organized in the same way despite different functions. • Question 10 2 out of 2 points Which of the following groupings are in order from broadest to narrowest? Correct Answer: d. Class, family, species