Exam #3 Review Practice Question Answer Key

1. If two organisms can interbreed and produce fertile offspring, they are considered the same species under the: A. Biological species concept B. Morphological species concept C. Ecological species concept D. Phylogenetic species concept 2. Two related species of skunk having different mating seasons is considered a: A. Postzygotic barrier B. Prezygotic barrier C. Both A and B D. None of the above 3. Which of the following is an example of sympatric speciation? A. A species of plant diverges into two species in the same area due to an expansion of the genome/polyploidy B. Two recently diverged species mate with each other and produce viable and fertile hybrid offspring C. A population of squirrels, separated by a canyon, becomes two different species D. A bacteria receives genes from another bacteria via bacteriophage 4. Speciation occurring after surviving species move into ecological niches after a mass extinction is an example of: A. How natural disasters can move a species from its native habitat B. Adaptive radiation C. Overpopulation D. Carrying capacity 5. The sequence in which fossils appear, the rock layers they are in, and the ages of the rocks are the: A. Fossil record B. Stromatolites C. Geologic record D. Stalagmites 6. Adapting an existing structure for a new function is called: A. Exaptation B. Exporting C. Synastry D. Analogy E. None of the above 7. The first part of a scientific name, or binomial, for an organism is the: A. Order B. Family C. Genus D. Species 8. Which of the following conditions of Hardy-Weinberg Equilibrium is broken when a population undergoes allopatric speciation? A. No Migration B. No Genetic Drift C. No Selective Mating D. A and B 9. Which of the following is an example of a postzygotic barrier? A. Hybrids being unable to reach sexual maturity B. Reduced hybrid fertility C. Hybrid breakdown D. All of the above 10. Two populations of chipmunks live on either side of a mountain in Tibet. They are unable to mate because of: A. Gametic isolation B. Mechanical isolation C. Hybrid instability D. Habitat isolation 11. Which of the following is an example of an abiotic factor in a population’s environment? A. Climate B. Bacteria in the soil C. Mineral composition of the soil D. A and C E. None of the above 12. Which realm within the oceans encompasses all open water? A. Benthic realm B. Pelagic realm C. Photic zone D. Aphotic zone 13. Which of these biomes occurs in equatorial areas with lots of warm temperatures and variable rainfall? A. Savanna B. Chaparral C. Tropical forest D. Temperate broadleaf forest