Walden University BIOL 1001 Final Exam WEEK 6

Question 1 North America is currently experiencing an unprecedented and rapid loss of species. What is believed to be the main cause? Correct Answer: d. Human activities Question 2 Which of the following is not a form of evidence used in understanding the evolutionary relationship among living organisms? Correct Answer: c. All of the above Question 3 During cellular respiration, glucose is metabolized into the low-energy compounds carbon dioxide and water, while the rest of the energy released goes where? Correct Answer: a. Into ATP Question 4 Different versions of the same genes are called: Correct Answer: a. Alleles Question 5 During the 19th century, sea otters were hunted almost to the point of extinction. When the number of sea otters became very low, the ecosystem of kelp bed “forests” also declined. Scientists discovered that the sea otters were predators of sea urchins, which were, in turn, predators of the kelp. When sea otters declined, the sea urchin populations grew, destroying the kelp ecosystem and the many species that depended on it. It was then understood that sea otters were in this ecosystem. Correct Answer: d. a keystone species