Bio 201 F11 ex 1 practice set

Bio 201 F11 ex 1 practice set - Bio 201 Fall 2011 practice...

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Bio 201 Fall 2011 practice question set for mid term 1 (answers are at the end) 1 1. Which of the phylogenetic trees above represents the most parsimonious hypothesis regarding the evolution of brown fur color in these four taxa? (a) A (b) B (c) C (d) D (e) E 2. Which of the following situations is most likely to lead to sympatric speciation? (a) Individuals in a population of lizards are introduced to an island. Separating them from the main land population. (b) A river separates a population into two smaller populations. There is no gene flow between the two smaller populations. (c) The same species of plant growing in two locations. (d) The same species of insect mating on different flowers found in the same region. (e) A species of bird that disperses to multiple islands with no gene flow between islands.
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Bio 201 Fall 2011 practice question set for mid term 1 (answers are at the end) 2 3. One piece of evidence for the operation of natural selection is antibiotic resistance in bacteria. Which of the following statements is not true regarding antibiotic resistance? (a) Mutations that confer antibiotic resistance are usually already present in the population. (b) Fitness of bacterial genotypes is dependent upon the environment. (c) There is evidence of altruism in bacteria. (d) Resistance to an antibiotic can be costly to the cell. (e) In the absence of antibiotics, the resistant bacteria will usually remain at a high frequency in the population. 4. Which of the following describes a controlled experiment? (a) two different strains of bacteria are grown on identical media (food) in a laboratory incubator to see which strain grows fastest (b) a mathematical model is devised to predict whether a species of rabbit is likely to go extinct (c) one species of fruit fly is trapped at a single location to collect DNA for sequencing
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This note was uploaded on 09/29/2011 for the course BIO 201 taught by Professor True during the Spring '08 term at SUNY Stony Brook.

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Bio 201 F11 ex 1 practice set - Bio 201 Fall 2011 practice...

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