General Bio II

Biology 112/4101 & 4102 – Fall 2018 – Lecture Exam 1 – Form A Mr. Bill Rhoades – Wake Technical Community College; Raleigh, N.C. Bio 112/4101 & 4102 – Fall 2018 – Lecture Exam 1 – Form A This exam is worth 150 points (15% of your final grade in the course). Multiple Choice: Read all 5 choices before deciding on your answer. (120 points) Mark your answers on your Scantron sheet Each of the 40 multiple choice questions is worth 3 points. 1. Who was most instrumental in Charles Darwin becoming aware of the extremely old age of the earth as he formulated his theory of natural selection? b. James Hutton & Charles Lyell 2. About when did the Cambrian explosion of life take place? e. 0.54 BYA 3. Structures in an organism, such as the pelvic bones of some of the great whale species, that have no apparent function are considered to be ________________ to similar structures in an ancestor or other relative that do have an obvious function. a. vestigial 4. In the modern method of biological classification called “cladistics”, a. only monophyletic groupings are permissible 5. When natural selection favors one of the two phenotypic extremes in a population for some trait, the “mode” of selection is called d. stabilizing 6. When speciation occurs even though there are no geographical barriers to prevent gene flow, the speciation is referred to as d. sympatric 7. Where is the “Wallace Line”? e. it divides the eastern islands of the Indonesian Archipelago from the western islands of the Indonesian Archipelago 1 Biology 112/4101 & 4102 – Fall 2018 – Lecture Exam 1 – Form A Mr. Bill Rhoades – Wake Technical Community College; Raleigh, N.C. 8. A paraphyletic grouping of species is defined as a. species that all evolved from the same common ancestor, but NOT all of the descendants of that common ancestor are included in the group 9. Which of the following is often considered to be the “father” of taxonomy? e. Carolus Linnaeus 10. Which of these is FALSE in regard to “cyanobacteria”? e. They rely on other microbes in their ecosystem for many of their metabolic needs. 11. About what percentage of today’s atmosphere on earth is comprised of oxygen gas (O 2 )? d. 21% 12. Under what conditions would we expect punctuated equilibrium rather than Darwinian gradualism to occur? a. When environmental conditions are changing rapidly. 13. In the Hardy-Weinberg equilibrium equation, what represents the frequency of the homozygous dominant genotype? a. p 2 14. What is the primary reason that paleontologists change the name of the Era at particular times in the history of organisms? a. There is a dramatic change in the community of organisms worldwide. 15. About how long ago was life first established on earth according to the fossil record? b. 3.8 BYA 2

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