Chem 219: Module 2 Exam Questions With 100% Correct Answers

Chem 219: Module 2 Exam Questions With 100% Correct Answers The challenges of investigating speciation include: 1. Detecting reproductive isolation 2. Clonal reproduction in bacteria 3. Measuring the fitness of offspring 4. Different species can appear identical 5. Detecting female preferences 6. Members of the same species can appear quite different 1, 2, 4, 6 While on a hike in South America, Daria discovered what she thinks is a new species of monkey. Which of the following would confirm that the monkey is in fact a new species? A. They are unable to mate with any similar known species to produce fertile, viable offspring B. They have a distinct call which no other monkey in the area does C. They look different from any other known species she has seen in that area D. They occupy a habitat which no other monkey in the area does A A population of rabbits lives on a mountainside which has a river flowing down it. During a storm a new branch of that stream is formed which separates part of the rabbit population from the rest. Over time these two groups of rabbits which used to be part of the same population begin to evolve independently due to slight differences in their habitats. These rabbits are an example of: A. Allopatric speciation B. Temporal isolation C. Behavioral isolation D. Sympatric speciation A Two species of salamander living in the same area were once part of the same species population. They are still able to mate to produce hybrids but the hybrids that they are producing are less fit for the environment than either of the 2 populations. what will most likely happen to this hybrid zone of reproduction over time? A. Fusion of the two species will happen, once again forming just one species. B. Reinforcement will occur and the two species will continue to diverge from one another until they can no longer mate. C. Hybrid inviability will occur. D. Nothing will happen, the two populations will continue to coexist and produce hybrids. B This graph shows the percent of strains sensitive to bacteriocins and antibiotics among E. coli isolated from patients with UTIs. What is the key take-home message from this graph? A. Bacteriocins are equally effective at inhibiting UTI pathogens as antibiotics. B. Antibiotics are not effective against UTI pathogens C. Bacteriocins and antibiotics are not highly effective at inhibiting UTI pathogens. D. Bacteriocins are not effective against UTI pathogens. A This table reports the CFUs/ml of a strain of E. coli 24 hours after being treated with an antibiotic (Cipro) versus a bacteriocin (BCTX07), compared to an untreated control. Which of the following are true statements? 1. Antibiotics act far more quickly than bacteriocins 2. Bacteriocins do not inhibit the growth of this strain 3. Antibiotics inhibit the growth of this strain 4. Untreated cells show limited growth in 24 hours 5. Bacteriocins kill more rapidly than antibiotics in this study 3, 5 This table shows the inhibitory activity of two bacteriocins (BCTX006 and BCTX010) applied singly and in combination against a panel of bacterial genera. Which of the following are true statements about these data? 1. These drugs are more effective when combined against E. coli 2. These two bacteriocins are highly targeted in their inhibitory activity 3. These two bacteriocins are not highly targeted in their inhibitory activity 4. These drugs are more effective when combined against Citrobacter 5. The majority of genera are not inhibited by these two bacteriocins 1, 2, 5 T/F: Sexual selection is always beneficial to the organism F The zebra finch study we examined in class showed us that when finches are able to choose their mates, the outcome includes which of the following: 1. A decrease in the number of viable offspring 2. A decrease in their own fitness 3. An increase in their own fitness 4. Production of more hatchlings 5. Increases in embryo mortality 3, 4 What are the two major types of processes involved in sexual selection? A. Good genes and sexy sons B. Leks and harems C. Anisogamy and sexual dimorphism D. Competition for and choice of mates D Which of the following traits are consequences of sexual selection mediated by competition among males for mates? A. Morphology of male gonads B. Larger body size than females and impressive adaptations for physical competition not found in females C. Feeding efficiency D. Striking plumage, like the peacock's tail B To demonstrate that females are choosing males based on possession of genes for