BIOL 1001 FINAL EXAM WEEK 6 QUESTION AND ANSWERS 100 % CORRECT

BIOL 1001 FINAL EXAM WEEK 6 – QUESTION AND ANSWERS Course BIOL-1001P-8/BIOL-1001L-8/BIOL-1001-8-Introduction to Biology2017 Spring Qtr 02/27- 05/21-PT5 Test Exam ­ Week 6 Started 5/19/17 9:46 PM Submitted 5/20/17 12:43 AM Due Date 5/22/17 1:59 AM Status Completed Attempt Score Time Elapsed 2 hours, 56 minutes out of 3 hours Instructions Please answer each question below and click Submit when you have completed the Exam. Results Correct Answers Displayed 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 Question 6 A particular Galápagos finch uses the sharp point of its beak to break open small nuts and the strength of its jaws to crack open larger nuts. When a breeding population is blown onto an island with a choice of either very small nuts or very large nuts, members of the group began to specialize, one group eating only very small or very large nuts, depending upon their beaks. Over time, two stable groups developed, each directed towards its specific niche. This is an example of: Correct Answer: d. Diversifying selection Question 7 You are trying to breed a heterozygote Rr rat and want to avoid homozygotes. Which of the following crosses would be your best choice? Correct Answers: c. RR x rr Question 8 Driving along a rural two-lane highway, you notice red-winged hawks perched on a tree approximately every mile or so. This pattern continues for quite a few miles. This is an example of a distribution. Correct Answer: e. uniform Question 9 Gametes fuse together during: Correct Answer: e. Fertilization Question 10 Match each term in column 1 with its definition in column 2. Question Correct Match Metastasis c. When cancerous cells lose contact inhibition and begin to move around the body Translation d. When protein is assembled from the instructions in the genetic code Angiogenesis a. When a tumor attracts and redirects blood vessels to keep it supplied with oxygen and nutrients Biopsy b. Retrieval and examination of tissue to determine whether cells are cancerous Question 11 Which of the following is NOT likely to be an example of an evolutionary change in a population? Correct Answer: d. An increase in the number of people diagnosed with colon cancer Question 12 Which of the following is not a way in which fossil evidence supports the theory of common descent? The fossil record: Correct Answer: c. Typically contains many complete bodies, so they are easy to classify Question 13 Choose the false statement: Correct Answer: e. All of the above statements are true. There are no false statements here. Question 14 Which of the following statements about the greenhouse effect is false? Correct Answer: a. Human behavior does not affect the concentration of greenhouse gases in the atmosphere. Question 15 In pea plants, the allele for purple flowers (P) is dominant to the allele (p) for white flowers. In a cross between a purple- flowered plant and a white-flowered plant, all 73 of the offspring plants had purple flowers. Which of the following most likely describes the cross above? Correct Answer: b. PP x pp Question 16 Which of the following facts is used to support the theory of evolution? Correct Answer: e. All of the above. Question 17 What aspect of DNA demonstrates the degree of relatedness between organisms? Choose the best answer. Correct Answer: b. The order of bases along the DNA Question 18 The actual carrying capacity of our planet may be lower than initially calculated because: Correct Answer: d. Modern food production relies on nonrenewable resources Question 19 The flexible characteristics of the cell membrane is referred to as: Correct Answer: b. Fluid mosaic Question 20 Which of the following is the proper equation for cell respiration? Correct Answer: c. C6H12O6 +6 O2 → 6 CO2 + 6H2O + energy Question 21 Which statement is false? Correct Answer: b. A mutated oncogene is a proto-oncogene. Question 22 Data collected from the major fisheries of the world indicate that the stocks of big fish in the oceans have fallen by 90% since 1950. Ocean going tuna, swordfish, marlin, and large groundfish populations are at about 10% of their previous sizes. Due to industry expansion over the same period of time, the tonnage of fish caught in US fisheries has nearly doubled. The loss of large ocean going fish is most likely due to: (Choose the best answer) Correct Answer: a. Overexploitation Question 23 Which of the following statements is a testable scientific hypothesis? Correct Answer: b. Eating fish reduces the chance of having a stroke. Question 24 Consider a cell that underwent mitosis but not cytokinesis. The result would be: Correct Answer: b. A cell with two nuclei Question 25 Match each term in column 1 with its description in column 2. Question Correct Match Photosynthesis d. Process by which carbon dioxide and water are converted to glucose and oxygen Cellular respiration b. Process by which glucose and oxygen are converted to carbon dioxide and water Anaerobic respiration c. Process by which energy is released from carbohydrates without using oxygen Calvin cycle a. A process within photosynthesis Question 26 Hemophilia is an x-linked recessive allele causing a blood disorder. If a man without hemophilia and a woman who is a carrier of the disease have a daughter, what are the chances that she will have hemophilia? Correct Answer: c. 0% Question 27 Table sugar (sucrose) belongs to which category of nutrients? Correct Answer: c. Carbohydrates Question 28 What would happen if a mutation created a new allele that decreased fitness? Correct b. Answer: The new allele would decrease the fitness of the individual that possessed it, and that individual would have few or no offspring. Question 29 Which of the following are thought to have evolved from prokaryotic life via endosymbiosis? Correct Answer: d. All of the above Question 30 Diffusion is: Correct d. Answer: The movement of molecules from an area of high concentration to an area of low concentration Question 31 Which statement is true? Correct Answers: c. Somatic cells contain more DNA than egg cells Question 32 Match each term in column 1 with its example in column 2. Question Correct Match Introduced d. species A mammal brought to a region from another continent by settlers eats a variety of plants upon which native species depend for food. Habitat a. Fragmentation A newly constructed freeway separates a large tract of brush and trees with a creek from the neighboring natural forest. Pollution c. The runoff of waste into a stream causes a fish kill. Overexploitation b. A whale population plummets as a result of hunting. Question 33 Which of the following is at the “bottom” of a trophic pyramid? Correct Answer: e. Producers Question 34 There have been mass extinctions experienced on a global scale before the current extinction epoch. Correct Answer: b. five Question 35 Match each macromolecule in column 1 with its description in column 2. Question Correct Match Nucleic acids c. Includes RNA Carbohydrates b. Includes monosaccharides and polysaccharides Lipids a. Includes phospholipids that are important to cell membrane function Proteins d. Includes enzymes, which help regulate a cell’s chemical reactions