CH 30 BIO

25 July 2022
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54 test answers

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When a population reaches the stable equilibrium phase, this is considered
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the carrying capacity of the environment.
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. After several years, the population stabilized with approximately 150 individuals. The butterflies and the flowers that they require for food would be considered an example of a(n) __________.
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community
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All of the following are true of BOTH logistic growth and exponential growth EXCEPT
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they both have a stable equilibrium phase.
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Which of the following is an example of a density independent factor?
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flooding after heavy rains
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Which of the following descriptions is NOT associated with the correct survivorship curve?
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Bald eagles return to the same mates and nests each year. They typically have 2-3 eggs and with parental care provided by both parents, the survival rate of the chicks is high. - Type II
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Which of the following represents a Type II survivorship curve?
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organisms that have an equal probability of dying all age groups
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Schools of parrot fish tend to remain within close proximity to coral reefs for protection from predators and for easy access to food sources. What type of distribution does this represent?
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clumped
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During a summer with lots of rain, the vegetation grew lush and the white-footed mouse populations increased due to increases in food availability. However, the next 2 summers were record drought years and food became increasingly scarce. Over these 2 years, the population size of the mice decreased due to increased competition for access to food. This increased competition is an example of
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a density dependent factor.
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Different populations living in the same geographical region is a(n) ________.
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community
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Jacob is studying a population of wrens in Michigan. Over several years, he notices that the population always stabilizing at around 45 individuals. Forty-five individuals is
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the carrying capacity.
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If a population of 200 squirrels has a 10 percent growth rate each year, how many individuals will there born in the next year?
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20
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Exponential growth
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results in accelerating growth.
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A population growth curve that exhibits both exponential growth and a stable equilibrium phase is
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growing logistically
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The growth rate continues to rise in some Asian countries. This is because
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no there is a higher number of postreproductive and reproductive no individuals compared to prereproductive individuals. A population that is growing has more individuals in the pre- and post- reproductive age groups and thus the age structure diagram resembles a pyramid.
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. When the butterflies first arrived on the island they did not have to compete for access to food or space. In addition, there were few natural predators such as wasps and birds which were common on the mainland. As a result, the island population will have a __________ biotic potential compared to the mainland population.
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higher
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. Prior to this event, this species did not inhabit the island, but with the ample vegetation on the island and a lack of predators, the displaced individuals were able to survive and reproduce. After several years, the population stabilized with approximately 150 individuals. The 150 individuals on the island is an example of the
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carrying capacity
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Which of the following is true about the current state of human population growth?
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After the Industrial Revolution, population growth increased.
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Which of the following is an example of exponential growth?
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1500β†’1550β†’2010
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If the fishing village of Hopkins Belize is experiencing a decreasing population. What should they do if they wish to reverse this trend and see the greatest amount of population growth in the next 10 years?
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Increase the number of individuals in the reproductive stage
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In which of the following areas is human population growth the lowest?
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Europe
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All of the following impact biotic potential EXCEPT
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no resource abundance. The age at which reproduction begins is more important in determining the biotic potential.
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Which of the following is an example of a density dependent factor?
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parasitism
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. Prior to this event, this species did not inhabit the island, but with the ample vegetation on the island and a lack of predators, the displaced individuals were able to survive and reproduce. When the butterflies initially arrived on the island, they did not have to compete for food or space. What type of population growth did they likely exhibit?
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exponential
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A butterfly species has very wide distribution across southern Florida. In addition, the adults and caterpillars can use a wide array of plant species as a food source and also tolerant a broad range of temperatures. Based on these criteria, this species is unlikely to face extinction in the immediate future.
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True because they have broad habitat tolerances.
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Prairie dogs are highly social, burrow dwelling rodents. Families have a strict social hierarchy and their "towns" can span hundreds of acres. In one colony, 750 animals live in a 500m2 area. What is the population density?
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1.5
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Equilibrium populations tend to exhibit a Type III survivorship curve.
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False because equilibrium populations tend to have low mortality rates early in life.
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What is the greatest problem that the human population will face if we fail to have a greater understanding of ecology and environmental science?
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We will have a lack of understanding about the problems that the human population poses to the health of the biosphere.
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Which of the following statements is correct about the comparison between MDCs and LDCs?
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MDCs consume 4xs as many metals and 3xs as much paper as LDCs.
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Which of the following is true about the majority of LDCs?
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no They exhibit the highest per capita resource consumption................................... Overpopulation is more common in LDCs, but typically per capita resource consumption is higher in MDCs
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Which statement about ecology and environmental science is correct?
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The field of environmental science applies the ecological principles to human based concerns.
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All of the following are true about human population growth EXCEPT
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we will reach the Earth's carrying capacity within the next 20 years.
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Above is a life history table for a minnow (small fish). Based on this table, how many years until the population drops to less than 50% of its original population?
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< 1
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Which of the following is NOT characteristic of opportunistic populations?
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logistic growth
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Jacob is studying a population of wrens in Michigan. Over several years, he notices that the population always stabilizing at around 45 individuals. What is the reason for this?
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no population at maximum density............. The carrying capacity is the maximum number of individuals that the environment can sustain.
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. During the first year, 80 caterpillars hatched from eggs laid by the butterflies and only 5 individuals in the population died. What is the growth rate for the population during this period?
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3%
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What is the carrying capacity for the population of beetles indicated by the graph?
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10,000
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Which of the following is true about populations with a negative growth rate?
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The death rate exceeds the birth rate.
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In European countries such as Italy, people are delaying childbirth and or choosing to have only 1 or no children. Which of the following age structure diagrams illustrates this type of trend?
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decreasing population
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Jacob is studying a population of wrens in Michigan. During one severe winter, 5% of the birds died due to starvation and cold temperatures. This is an example of
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a density independent factor.
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Meghan is studying interactions between caribou and their wolf predators. This is an example of ___________ ecology.
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community
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. The hurricane which lead to the arrival of the butterflies on the island is an example of a(n) ________ factor.
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Density-independent factors
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Above is a life history table for a minnow (small fish). Based on this table, what type of survivorship curve do these animals have?
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Type III
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What is an organism's biotic potential?
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The maximum rate of population growth with unlimited resources.
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All of the following are true about equilibrium populations EXCEPT
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little or no parental care.
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. In general, each female butterfly lays more than 50 eggs each year, but only a few individuals survive for more than a month after hatching from the eggs. What type of survivorship curve most accurately represents this species?
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Type III
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Organisms are more likely to face extinction if they have which of the following characteristics?
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restricted geographic ranges
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This photo is an example of a(n) ______________.
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ecosystem
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Emperor penguins defend an area around their nests. Their territory encompasses a complete circle around the nest with approximately a 0.5m radius. If each nesting penguin has this same size and shape territory, what type of distribution will these animals exhibit?
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uniform
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During a recent hurricane, 25 individuals of the same butterfly species were blown onto a barrier island in southern Florida. When the butterflies first arrived on the island, they remained in the southeast corner of the island where most of the flowering plants had not been destroyed or uprooted by the high winds and seas during the hurricane. What type of distribution do these butterflies exhibit?
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clumped
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Which of the following populations has the greatest biotic potential?
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Population D in which individuals reach sexual maturity in 6 months and produce 5 offspring each year.
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The birthrate in a small town is 14 per 1,000 per year and the death rate is 5 per 1,000 per year. What is the annual growth rate for this town?
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0.9%.
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Honey bees have been declining at dramatic rates in the last few years. Colony collapse disorder has been linked to a virus and results in hives completely emptied of bees among both wild populations and domestic hives. Recently, scientists have suggested that infected bees may contaminate flowers that they visit and thus spread the disease. This is an example of a(n) ________________.
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density-dependent factor.
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Which of the following represents a Type III survivorship curve?
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no Spiders produce egg sacs with thousands of offspring but only a few survive to adulthood. A Type III survivorship curve represents animals that have low mortality early in life.
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Which of the following descriptions is NOT associated with the correct survivorship curve?
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not black bear answer There are three common types of survivorship curves. In a type I curve, survival is high until old age, when deaths increase due to illness. In a type II curve, the possibility of death is equally likely over all age groups. In a type III curve, death is likely among the young, and few individuals reach old age.