General Bio II

Biology 112/4101 & 4102 – Fall 2018 – Lecture Exam 1 – Form A Mr. Bill Rhoades – Wake Technical Community College; Raleigh, N.C. 37. Which of these (a through d) is FALSE in regard to mutations? c. they are more likely to occur when a population needs a particular trait in order to survive 38. The movement of alleles from one population to another is called c. gene flow 39. Evolutionary change that is due entirely to chance is called d. genetic drift 40. Which of these is not "homologous" to the other structures listed? d. fluke (rear “tail”) of a great whale 6 Biology 112/4101 & 4102 – Fall 2018 – Lecture Exam 1 – Form A Mr. Bill Rhoades – Wake Technical Community College; Raleigh, N.C. Name: __________________________________ Short Answer: Answer each question as thoroughly as you can. (30 points) Use complete sentences where appropriate. Each of the 6 questions is worth 5 points. 1. List the eras of life on earth (from most ancient at the bottom to most recent at the top). Next to each era’s name, write how long ago (in MYA; NOT in BYA) that era began and how long ago that era ended. Era Name : Began (MYA) : Ended (MYA) : _Precambrien Era _ ____3.8 BYA ______ ____540 MYA _____ __Paleazoic Era ____ __540 MYA _____ ___250 MYA ______ __Mezazoic Era ____ ____250 MYA ______ ___65 MYA _______ ___Cenazoic Era ____ ____65 MYA _____ ___Today ________ 2. Match each of these items to the name of the person most responsible for it in the history of evolutionary thought. Write the CAPITAL letter of your choice in each blank. Each choice can be used only once. A. Alfred Wallace C. George Buffon E. Charles Lyell B. Carolus Linnaeus D. Jean Baptiste de La Marck __ A _ a. developed natural selection theory independently of Darwin __ E _ b. follower of James Hutton; contemporary of Darwin; wrote Principles of Geology __ D __ c. suggested that evolution occurs, but simply because of the use and disuse of body parts – those parts used repeatedly enlarge and become more functional; those rarely used become atrophied and unable to function properly. __ C __ d. an early evolutionist in the late 1700’s but proposed no mechanism for how the change in species might occur __ B __ e. established the “kingdom to specific epithet” classification scheme 7 Biology 112/4101 & 4102 – Fall 2018 – Lecture Exam 1 – Form A Mr. Bill Rhoades – Wake Technical Community College; Raleigh, N.C. Name: ______________________________ 3. Since the process of natural selection is constantly changing a population’s characteristics to better fit its natural environment, why have the vast majority of species to have ever lived on the earth gone extinct? Note: You should be able to answer this question in one sentence. The majority of species have gone extinct because of environmental change. 4. a. Label the axes of this graph representing a population BEFORE natural selection occurs. Label the mean phenotype . Note: This is the same graph that we studied in lecture when learning about the modes of natural selection. __________________________________________________ b. Draw the same graph after stabilizing selection has occurred. Don’t forget to label the axes on this graph too . Label the old mean phenotype , and the new mean phenotype if it has changed. _____________________________________________________ 8

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