Chapter 06 - Population Biology 6-1 Chapter 06 Population Biology Multiple Choice Questions 1. An organism's biotic potential is the maximum number of offspring A. That survive to adulthood B. Its habitat can support C. It produces at one time D. It actually produces over its lifetime 2. _____________ growth rate describes a predictable rate of change at discrete points in time. A. Feedback B. Logistic C. Exponential D. Geometric E. Overshoot 3. In the real world, many factors determine the numbers of organisms in any one population. Yet, a "superfly" with unlimited food and no mortality would show what type of growth? A. Carrying capacity geometric increase B. Irruptive growth C. Exponential growth D. Logistic growth E. Malthusian growth 4. In cases of exponential growth rates, a population ________ each year. A. Increases at the same rate B. Is multiplied by a constant number C. Doubles D. Triples E. Increases by a constant number (one, ten, one hundred, etc.), depending on the system 5. Which of the curves in the diagram represents exponential growth? A. A B. B C. C D. D E. E 6. Carrying capacity is the population or biomass A. That an environment can support in an optimal year B. Of a species that an environment can support on a long-term basis C. That remains after a catastrophic dieback has occurred D. Of a species without limiting factors E. Of a species without predators Chapter 06 - Population Biology 6-2 7. In the real world, population explosion is usually followed by A. Continuous high population levels B. A gradual decrease in population as food supplies dwindle C. A tremendous increase in genetic diversity D. A gradual increase in population due to the availability of mates E. A population crash 8. A dieback or population crash, often occurs after a species ________ its environmental carrying capacity. A. Meets B. Undershoots C. Overshoots D. Oscillates around E. Decreases 9. An island has formed off the coast of the Pacific Northwest. The Department of Natural Resources (DNR) has determined that there is enough land area for a herd of 100 elk, yet they say the carrying capacity is only 60 elk. This inequality can best be explained by the fact that the A. DNR is probably being careful not to overestimate B. DNR must have added up the environmental resistance incorrectly C. Elk population will probably fluctuate between 60 and 100 animals D. Physical factor of space is only one of the determiners for population size in a community E. Law of limiting factors determines the maximum growth rate for a given population 10. Logistic growth rates are those in which a population A. Grows very slowly when conditions are good and when conditions are not optimal B. Grows rapidly when conditions are good, then slows as it approaches carrying capacity C. Overshoots and dies back repeatedly D. Remains significantly below carrying capacity E. Grows at a constant rate of increase per unit time 11. The ability to produce rapid population overshoots can be a useful strategy for a species that tends to A. Colonize new territory B. Maintain a firm position in its current habitat C. Be part of a climax community D. Develop intricate niche relationships E. Be part of a complex ecosystem 12. Which of the following types of population growth patterns would best represent a group of elephants that enter a new, open habitat and become a stable part of that ecosystem? A. Exponential growth B. Irruptive growth C. Malthusian growth D. Chaotic or catastrophic growth E. Logistic growth Chapter 06 - Population Biology 6-3 13. Which of the following types of population curves would best represent a group of elephants that enter a new, open habitat and become a stable part of that ecosystem? A. Norm-shaped curve B. S-shaped curve C. J-shaped curve D. Cyclic oscillation-shaped curve E. Survivorship curve 14. Widespread starvation is an example of _________ population control. A. Predator-caused B. Biotic C. Density-dependent D. Density-independent E. Abiotic 15. You are studying an organism that is a pioneer species is an opportunist and does not care for its offspring. This organism probably has a _________________ population growth strategy. A. K-adapted B. R-adapted C. Irregular D. Catastrophic E. R-adapted and irregular 16. You are studying an organism that is fairly large, matures slowly, lives fairly long and cares for its offspring. This organism probably has a _________________ population growth strategy. A. K-adapted B. R-adapted C. Irregular D. Catastrophic E. R-adapted and irregular 17. Density-independent population control factors cause mortality A. When the population becomes too large B. When the density becomes too high C. When the population becomes too small D. When the density becomes too low E. Regardless of population size 18. An organism with ___________ "strategies" would be considered to have __________ natality. A. K-adapted; high B. R-adapted; high C. K-adapted; low Chapter 06 - Population Biology 6-4 D. R-adapted; low E. R-adapted; high AND k-adapted 19. Natality is usually A. Constant in a population B. Constant for a species C. Constant in an ecosystem D. Variable, depending on the number of recent deaths E. Variable, depending on environmental conditions 20. The term "fecundity" refers to an organism's ____________ while fertility is ______________. A. Physical ability to reproduce; actual number of offspring produced B. Actual number of offspring produced; physical ability to reproduce C. Average life span; physical ability to reproduce D. Replacement level of reproduction; actual number of offspring produced E. Physical ability to reproduce; replacement level of reproduction 21. Life expectancy is the A. Maximum life span that an individual of a given species could reach B. Number of individuals in a population that survive in a given year C. Number of years an individual of a certain age will probably live D. Probability that an individual will survive infancy E. All of these are descriptions of life expectancy 22. Survivorship is determined by A. The percentage of a cohort that survives to a certain age B. Number of individuals in a population that survive in a given year C. Number of years an individual of a certain age will probably live D. Probability that an individual will survive infancy E. Maximum life span that an individual of a given species could reach 23. The longest period of life that a given type of organism can reach is known as A. Survivorship B. Life span C. Life expectancy D. Mortality E. Fecundity 24. The most common factor that affects birth and death rates within a population independently of density is A. Fire B. Competition C. Weather D. Stress E. None of these is correct Chapter 06 - Population Biology 6-5 25. If there is no migration, the size of a population is limited solely by interaction between A. Natality and fertility B. Mortality and fecundity C. Mortality and survivorship D. Natality and mortality E. Life expectancy and survivorship 26. Predation is considered to be a(n) _______________ factor. A. Extrinsic B. Intrinsic C. Abiotic D. Biotic E. Extrinsic and biotic 27. Which of the following is an abiotic population control mechanism? A. Predation B. Disease C. Water shortages D. Prey shortages E. Competition 28. Which of the following is a biotic population control mechanism? A. Nutrients B. Precipitation C. Day length D. Climate E. Pathogens 29. In general, abiotic regulatory factors tend to be ___________ while biotic factors tend to be _____________. A. Interspecific; intraspecific B. Intraspecific; interspecific C. Density-dependent; density-independent D. Density-independent; density-dependent E. Interspecific; density-independent 30. Which of the following is not a density-dependent population control factor? A. Stress B. Overcrowding C. Predation D. Drought E. Competition 31. Which of the following is an intraspecific interaction? A. Mutualism B. Territoriality Chapter 06 - Population Biology 6-6 C. Parasitism D. Predation E. All of these are examples of intraspecific interactions 32. Island biogeography explains the phenomenon of _______ terrestrial species on islands small and far from the mainland when compared to larger islands that are closer to the mainland and have __________ terrestrial species. A. Fewer; more B. More; fewer C. Larger; smaller D. Smaller; larger E. About the same number of; about the same number of 33. How does island biogeography apply to ecosystems other than islands? A. Relatively rare ecosystems such as coastal areas are more stable if they have high species diversity B. Habitats that are large and close to development are more adversely affected than smaller fragmented habitats C. Habitat fragmentation has formed islands of habitat in "oceans" of development D. Along with islands in oceans and lakes, the principles of island biogeography apply only to wetland areas E. Island biogeography is only concerned with islands in oceans and lakes 34. Genetic diversity is lost in a small population when A. The ecological diversity is high B. Genetic mutations cause some individuals in a population to be different in coloration or size C. Individuals from other populations are introduced into the population and the genes are diluted D. Only a few individuals survive a catastrophe E. Genetic mutations cause most individuals in a population to have similar genetic makeup Use the following information. DNA studies suggest that all existing cheetahs share a single male ancestor that survived in the not-too-distant past. Generally, all male cheetahs are now nearly genetically identical and have abnormal sperm with decreased reproductive success. The population is extremely vulnerable and genetically, may be predestined for extinction. 35. A species that is similar to the cheetah is the elephant seal because A. All of the individuals in the population are basically genetically identical B. The population is extremely vulnerable C. The population is probably predestined for extinction D. The males in the population suffer from deformed sperm E. All of these are correct 36. The first part of this scenario describes A. The founder effect or a demographic bottleneck B. Genetic drift Chapter 06 - Population Biology 6-7 C. Inbreeding D. Malthusian strategies E. Inbreeding or a genetic drift kameeswaran.pk Chapter 06 Population Biology
Want to see the other 7 page(s) in Review_questions-Chap6-Pol.pdf?JOIN TODAY FOR FREE!