Chapter 5 Poupulations Test

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Name: ______________________ Class: _________________ Date: _________ ID: B Biology Chapter 5 TestMultiple ChoiceIdentify the choice that best completes the statement or answers the question.____ 1. What does the range of a population tell you that density does not?a.the deaths per unit areab.the areas inhabited by a populationc.the births per unit aread.the number that live in an area____ 2. Which would be least likely to be affected by a density-dependent limiting factor?a. a population with a high birthrateb. a population with a high immigration ratec. a large, dense populationd. a small, scattered population____ 3. As resources in a population become less available, population growtha.reaches carrying capacity.b.becomes negative.c.enters a phase of exponential growth.d.increases slowly.____ 4. What can cause a population to grow?a.The birthrate becomes lower than the death rate.b.The birthrate becomes higher than the death rate.c.The birthrate stays the same, and the death rate increases.d.The birthrate and the death rate remain the same.____ 5. Demographic transition is change from high birthrates and high death rates toa. a low birthrate and a low death rate.b. a low birthrate and a high death rate.c.exponential growth.d.indefinite growth.____ 6. About 500 years ago, the world’s population starteda.decreasing. c.to reach carrying capacity.b.growing more rapidly. d.to level off.____ 7. Which are two ways a population can decrease in size?a.increased death rate and immigrationb.decreased birthrate and emigrationc.immigration and emigrationd.emigration and increased birthrate____ 8. If a population grows larger than the carrying capacity of the environment, thea.birthrate may rise. c.death rate may rise.b.carrying capacity will change. d.population will grow faster.____ 9. In countries like India, the human population is growinga.transitionally. c.exponentially.b.logistically. d.demographically.____ 10. Which density-dependent factors, other than the predator/prey relationship, affected the populations of moose and wolves on Isle Royale?a.food availability for the moose and disease for the wolfb.parasitic wasps for the wolves and clear-cut forest for the moosec.extreme temperatures for the moose and flooding for the wolvesd. a hurricane followed by drought for both moose and wolves____ 11. Which of the following is not likely to be a limiting factor on the sea otter population?a.disease c.droughtpetition d.predation____ 12. Which will reduce competition within a species’ population?a.higher population density c.higher birthrateb.fewer resources d.fewer individuals____ 13. In Rwanda, there are more young children than teenagers, and more teenagers than adults. This age structure indicates a population thata.will double in 30 years.b.has stopped growing.c.has a steady growth rate.d.will decrease in 30 years.____ 14. When individuals in a population reproduce at a constant rate, it produces a growth pattern calleda.logistic growth. c.growth density.b.demographic growth. d.exponential growth.____ 15. There are 150 Saguaro cacti plants per square kilometer in a certain area of Arizona desert. To which population characteristic does this information refer?a.age structure c.population densityb.growth rate d.geographic distributionCompletionComplete each statement.16. When an individual moves into a population from a different population, it is called____________________.17. Under conditions of logistic growth, population size will rise and fall around an average point calleda(an) _________________________.18. Zero population growth is a characteristic of ____________________ growth.19. Resource shortages triggered by increasing population size are density-____________________limiting factors.20. Social and ____________________ factors explain why some countries have high growth rates whileother countries grow slowly or not at all.Short Answer: Complete TWO questions for FIVE points each. Additional correct answers are worth one point extra credit.21. How does population growth in the United States compare with that of China and India?22. How can a demographer, or scientist who studies demography, predict how a population will change inthe future?23. How does emigration affect population size?24. What is a density-independent limiting factor? Give two examples.25. What kept the human population growth rate low before the Industrial Revolution?Essay : Answer TWO essay Question for FIVE Points. Additional correct answers are worth one point extra credit.26. Discuss four ways population size can change.27. Sequence the historical events that contributed to the current human population growth.28. Differentiate between density-dependent and density-independent limiting factors.29. Differentiate between exponential and logistic growth.30. Explain the limiting factors that control population growth.Other: Answer TWO QUESTIONS for FIVE POINTS each. Additional CORRECT answers are worth one point extra credit.USING SCIENCE SKILLSGraph I shows the curve for a culture of Paramecium aurelia. Graph II shows the growth curve for aculture of Paramecium caudatum, a larger species. Graph III shows the growth curves of each specieswhen they are grown together.Figure 5–131. Drawing Conclusions What is the most likely explanation for the decline of the P. caudatumshown in graph III of Figure 5-1?32. Interpreting Data According to Figure 5-1, which species has the greater initial growth rate whenthey are grown in separate cultures?33. Drawing Conclusions Are the limiting factors for all cultures in Figure 5-1 density-dependent ordensity-independent? Explain.34. Observing What type of population growth curve can be observed in graphs I and II of Figure 5-1?35. Interpreting Graphics From Figure 5-1, which species has the greater growth rate overall whengrown together? Describe the growth curve of P. caudatum in graph III.Biology Chapter 5 TestAnswer SectionMULTIPLE CHOICE1. ANS: B PTS: 1 REF: p. 1192. ANS: D PTS: 1 REF: p. 1253. ANS: A PTS: 1 REF: p. 1224. ANS: B PTS: 1 REF: p. 1205. ANS: A PTS: 1 REF: p. 1306. ANS: B PTS: 1 REF: p. 1297. ANS: B PTS: 1 REF: p. 1208. ANS: C PTS: 1 REF: p. 1229. ANS: C PTS: 1 REF: p. 13110. ANS: A PTS: 1 REF: p. 12611. ANS: C PTS: 1 REF: p. 12412. ANS: D PTS: 1 REF: p. 12513. ANS: A PTS: 1 REF: p. 13114. ANS: D PTS: 1 REF: p. 12115. ANS: C PTS: 1 REF: p. 119 COMPLETION16. ANS: immigrationPTS: 1 REF: p. 12017. ANS: carrying capacityPTS: 1 REF: p. 12218. ANS: logisticPTS: 1 REF: p. 12219. ANS: dependentPTS: 1 REF: p. 12520. ANS: economicPTS: 1 REF: p. 130SHORT ANSWER21. ANS:Population growth has slowed in the United States, but China and India are only in the beginning stageof demographic transition where the population is still growing rapidly.PTS: 1 REF: p. 13122. ANS:A demographer studies the social and economic factors that affect a population and the age structure inorder to predict how it will change.PTS: 1 REF: p. 13023. ANS:Emigration is the movement of individuals out of a population and reduces its size if all other factorsare equal.PTS: 1 REF: p. 12024. ANS:A density-independent limiting factor is a limiting factor that affects all populations regardless of size,such as a rainstorm, drought, fire, and certain human activities.PTS: 1 REF: p. 12525. ANS:Limiting factors, such as food scarcity and diseases, kept the human population growth rate low.PTS: 1 REF: p. 129ESSAY26. ANS:A population will increase or decrease in size depending on how many individuals are added to it orremoved from it. There are two ways individuals can be added to a population. Individuals can be borninto the population, or they can move into it from outside the population, or immigrate. There aretwo ways individuals can be removed from a population. They can die, or they can move out of thepopulation, or emigrate.PTS: 1 REF: p. 12027. ANS:During most of human history, population growth was slow. Food was hard to find, and there was nocure or treatment for diseases. Death rates and birthrates were high. With the beginning of agriculture,life became easier. The food supply became more reliable. With the Industrial Revolution, otheradvances, such as medicine and improved healthcare and sanitation, reduced the death rate and made itpossible to live longer. This is when the human population began to grow exponentially.PTS: 1 REF: p. 12928. ANS:Density-dependent limiting factors become limiting only when population density—the number oforganisms in a given area—reaches a certain level. These factors include competition, predation,parasitism, and disease. Density-independent limiting factors affect all populations in similar ways,regardless of population size. These limiting factors include weather, natural disasters, and certainhuman activities, such as damming rivers and clear-cutting forests.PTS: 1 REF: p. 125 | p. 12729. ANS:Exponential growth occurs when the individuals in a population reproduce at a constant rate. At first,the size of the population increases slowly, then it increases more and more rapidly until it approachesan infinitely large size. Under ideal conditions with unlimited resources, a population will growexponentially. Exponential growth does not continue in natural populations for very long. Resourcesbecome less available as the population grows, and the rate of population growth slows down. Logisticgrowth occurs when a population’s growth slows or stops following a period of exponential growth.PTS: 1 REF: p. 121 | p. 12230. ANS:Under ideal conditions, populations will continue to grow if there are not factors that limit theirgrowth. Some factors in a population’s environment that can limit growth are predation, competition,parasitism, and disease. Other limiting factors are climate extremes and human activities.PTS: 1 REF: p. 124OTHER31. ANS:P. aurelia is a better competitor for limited resources, such as food.PTS: 1 REF: p. 12232. ANS:P. caudatumPTS: 1 REF: p. 12233. ANS:The limiting factors are density-dependent. In Graphs I and II, the population growth rate decreasedand leveled out when the population size reached carrying capacity, as did P. aurelia in Graph III.PTS: 1 REF: p. 12534. ANS:Both populations show a logistic growth curve.PTS: 1 REF: p. 12235. ANS:Overall, P. aurelia had the greater growth rate. P. caudatum had the greater initial growth rate, but waseventually excluded by P. aurelia. P. caudatum eventually died out.PTS: 1 REF: p. 122。