Population Biology Quiz

Transcription

1 Population iology Quiz Grade: «grade» Subject: «subject» ate: «date»

2 1 On ten acres of native forest there are eight white-tailed deer, seven coyotes, 45 armadillos, and 231 loblolly pine trees. Which population has the highest density? white-tailed deer coyotes armadillos loblolly pine trees

3 2 population that grows until it reaches its carrying capacity usually has the shape of a(n) I J S M

4 3 For a particular species, the carrying capacity is the maximum number of individual organisms that. the species could reach in a given time period if all the offspring survive and reproduce could be supported by a given environment are in their post-reproductive years (organisms in the population are no longer able to reproduce) could be supported by any environment over a period of one year

5 4 Unrestricted populations of organisms experience. exponential growth linear growth fertility biotic growth

6 5 Young adult male chimpanzees look for mates outside their own population. The males then take the females back to their group. Which of the following occurs in female's original population? emigration immigration mortality natality

7 6 How does the logistic model of population growth differ from the exponential model? The exponential model shows a restricted growth rate. The logistic model considers the environment's carrying capacity. The graph of the exponential model is S shaped. The graph of the logistic model has a longer lag phase.

8 7 Which of the following involves a situation in which a density-dependent factor influences a population? Several seasons passed during which rainfall was ample, winters were not severe and food for snow hares was in good supply. hurricane severely disrupted a salt marsh and uprooted most of the marsh grass in an estuary. forest fire on the north side of a mountain forced the white-tailed deer from the north side to move into the range of the white-tailed deer on the south side of the mountain, making food more scarce. fter a heavy rain, pesticides that were applied to a cotton crop to control weevils ran off into a waterway that flows next to a field.

9 8 The country of ulgaria has a negative growth rate of percent. The rate of immigration is +0.5 percent and the rate of emigration is -0.5 percent. How do the birthrate and death rate of ulgaria compare? The birthrate and death rate are equal in value, but they have opposite signs. The birthrate has a higher value than the death rate, but they have opposite signs. The birthrate has a lower value than the death rate, but they have opposite signs. The birthrate and death rate are both zero.

10 9 What must occur in a population for it to grow? The birthrate becomes higher than the death rate. The birthrate stays the same and the death rate increases. The birthrate becomes lower than the death rate. The birthrate and the death rate remain the same.

11 10 Which are two ways a population can decrease in size? immigration and emigration increased death rate and immigration decreased birthrate and emigration emigration and increased birthrate

12 11 breeding pair of rabbits escaped from their cage behind a farmer s barn. The farmer observed the rabbits and kept data on their population size for ten years. uring this time, the rabbits reproduced and their offspring reproduced many times. The fenced, undisturbed two acres where the rabbits live support populations of predators, such as hawks and snakes, as well as a limited supply of grass and water. t the end of the ten years, the farmer graphed the data he collected. Which of the following best describes his graph? The graph is generally J shaped showing exponential growth. The graph is generally S shaped showing logistic growth. The graph is a horizontal line showing the effects of predation. he graph angles up in a straight line at 45º showing the effects of ample resources.

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