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Exam 30: Ecology and Populations

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Question 21

Multiple Choice

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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?

A) 9%
B) 0.9%
C) 19%
D) 1.9%
E) 0.19%

F) D) and E)
G) A) and D)

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Question 22

Multiple Choice

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Organisms are more likely to face extinction if they have which of the following characteristics?

A) restricted geographic ranges
B) broad habitat tolerance
C) large local populations
D) extensive geographic ranges
E) high biotic potential

F) A) and B)
G) C) and E)

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Question 23

Multiple Choice

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Which statement about ecology and environmental science is correct?

A population that is growing at a rapid rate would have an age-structure diagram with

Which of the following is a characteristic of equilibrium species?

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 500 m ² area. What is the population density?

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

Which of the following represents a type II survivorship curve?

Which of the following is true about human population growth?

Which of the following represents a type I survivorship curve?

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?

What is the correct ratio of fossil fuel consumption between the MDCs and LDCs?

If a population of 200 squirrels has a 10 percent growth rate each year, how many individuals will there be in the population after 3 years (assuming that no deaths occur during this period) ?

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?

Honeybees 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

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)

Different populations living in the same geographical region is a(n)

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.

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 two summers were record drought years and food became increasingly scarce. Over these two years, the population size of the mice decreased due to increased competition for access to food. This increased competition is an example of

Which of the following is an example of exponential growth?