practice_book_biology

Evolution 16 17 this section deals with the

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Unformatted text preview: ction deals with the interactions of organisms and their environment, emphasizing biological principles at levels above the individual. Ecological and evolutionary topics are given equal weight. Ecological questions range from physiological adaptations to the functioning of ecosystems. Although principles are emphasized, some questions may consider applications to current environmental problems. Questions in evolution range from its genetic foundations through evolutionary processes to their consequences. Evolution is considered at 1. Genetic variability Origins (mutations, linkage, recombination, and chromosomal alterations) Levels (e.g., polymorphism and heritability) Spatial patterns (e.g., clines and ecotypes) Hardy-Weinberg equilibrium 2. Evolutionary processes Gene flow and genetic drift Natural selection and its dynamics Levels of selection (e.g., individual and group) Trade-offs and genetic correlations BIOLOGY TEST PRACTICE BOOK 7 3. Evolutionary consequences Fitness and adaptation Speciation Systematics and phylogeny Convergence, divergence, and extinction Coevolution 4. History of life Origin of prokaryotic and eukaryotic cells Fossil record Paleontology and paleoecology Following are some general test-taking strategies you may want to consider. Read the test directions carefully, and work as rapidly as you can without being careless. For each question, choose the best answer from the available options. All questions are of equal value; do not waste time pondering individual questions you find extremely difficult or unfamiliar. You may want to work through the test quite rapidly, first answering only the questions about which you feel confident, then going back and answering questions that require more thought, and concluding with the most difficult questions if there is time. If you decide to change an answer, make sure you completely erase it and fill in the oval corresponding to your desired answer. Questions for which you mark no answer or more than one answer are not counted in scoring. Your score will be determined by subtracting one-fourth the number of incorrect answers from the number of correct answers. If you have some knowledge of a question and are able to rule out one or more of the answer choices as incorrect, your chances of selecting the correct answer are improved, and answering such questions will likely improve your score. It is unlikely that pure guessing will raise your score; it may lower your score. Record all answers on your answer sheet. Answers recorded in your test book will not be counted. Do not wait until the last five minutes of a testing session to record answers on your answer sheet. Preparing for a Subject Test GRE Subject Test questions are designed to measure skills and knowledge gained over a long period of time. Although you might increase your scores to some extent through preparation a few weeks or months before you take the test, last minute cramming is unlikely to be of further help. The following information may be...
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