BIOA02H3 Study Guide - Final Guide: Competitive Exclusion Principle, Exponential Growth, Character Displacement

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BIOA02 Life on Earth: Form, Function, and Interactions
Facilitated Study Group Final Review Part 2 of 2 (Lectures 1-6)
Multiple Choice Questions:
51. Imagine a population of birds in which one year old birds can either (1) find a mate and raise an
average of three offspring or (2) stay in their parents' territory and help the parents raise two more
offspring than the parents would have been able to raise without any help. Based on the theory of kin
selection, we would expect that _____.
A) most territories would have young birds helping at the nest
B) altruistic behavior would be common in this population
C) the behavior of helping at the nest would not evolve in this population
D) most first-year birds would choose to forgo breeding
E) nutrient cycles would be disrupted
52. Ritualization involves:
A) decreasing the conspicuousness (detectability) of the behaviour
B) increasing the amount of variation in the behaviour
C) increasing its separation from the behaviour’s original function
D) A and B
E) none of the above
53. Altruistic behaviors can be understood, in part, by considering the coefficient of relatedness (r)
between the individuals involved. Assume that an individual mammal has the option to raise its own
offspring, other genetic relatives, or a combination of offspring and other genetic relatives. From a
genetic point of view, which of the following represents the least successful option?
A) two offspring
B) two offspring and two first cousins
C) four grandchildren
D) one sibling and three nephews
E) seven first cousins
54. Which of the following statements best defines an altruistic act?
A) It immediately benefits both the performer and another individual.
B) It immediately benefits another individual at some cost to the performer.
C) It immediately benefits the performer and imposes a cost on another individual.
D) It imposes a cost on the performer and the other individual.
E) It imposes a cost on the performer without benefiting another individual.
55. Uniform distribution of resources will most likely lead to which of the following types of distribution?
A) Random
B) Uniform
C) Clumped
D) None of the above.
56. Patchy distribution of resources will most likely lead to which of the following types of distribution?
A) Random
B) Uniform
C) Clumped
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57. Individuals avoiding one another due to local depletion of resources will most likely lead to which of
the following types of distribution?
A) Random
B) Uniform
C) Clumped
D) None of the above.
58. In which of the following patterns of population are organisms clustered together in groups?
A) Random
B) Uniform
C) Clumped
D) None of the above.
59. Which of the following is NOT a term in the mark-recapture equation?
A) M
B) n + 1
C) n
D) N
60. The number of people living in a particular area at a particular point in time is known as the
__________ of that area.
A) Population density
B) Population distribution
C) Population
D) Population growth
61. When members of a population move out of a given area, it is called
A) survivorship
B) immigration
C) mortality
D) demography
E) emigration
62. Which of the following is a density-dependent factor?
A) food
B) drought
C) wind speed
D) flood
63. 90 birds were captured from a population. The following day, 80 birds including 16 from the previous
day that were marked, were captured. What is the size of the bird population?
A) 450
B) 125
C) 170
D) 106
E) 458
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64. Four-hundred robins were found in a ten-hectare plot. What is the density of robins in that plot?
A) 1 robin/ha
B) 4 robins/ha
C) 40 robins/ha
D) 400 robins/ha
E) 4,000 robins/ha
65. Under ideal conditions, population growth is described by which of the following models?
A) Linear growth model
B) Sinusoidal growth model
C) Exponential growth model
D) Logistic growth model
66. In a particular population, the birth rate is 50 organisms/year, the death rate is 20 organisms/year,
the immigration rate is 10 organisms/year, and the emigration rate is 5 organisms/year. What is the
growth rate of the population?
A) 55 organisms/year
B) 25 organisms/year
C) 35 organisms/year
D) 110 organisms/year
67. Which of the following statements represents the size of a population?
A) There are 200 wolves/ sq. metre.
B) There are 200 wolves.
C) There are 200 wolves born every year.
D) There are 200 wolves arranged in a random pattern.
68. Under realistic conditions, population growth is described by which of the following models?
A) Linear growth model
B) Sinusoidal growth model
C) Exponential growth model
D) Logistic growth model
69. In a certain population there are 500 organisms/ 100 sq. metres. The birth and death rates are 75
organisms/year and 35 organisms/year respectively. After a few years, there are now 600
organisms/100 sq. metres. However, the birth and death rates have not significantly fluctuated. What
can be concluded?
A) This is a density-dependent, r-selection population
B) This is a density-independent, r-selection population
C) This is a density-dependent, K-selection population
D) This is a density-independent, K-selection population
70. Density-dependent selection is to ___________ as density-independent selection is to ___________.
A) K-selection, r-selection
B) r-selection, K-selection
C) s-selection, K-selection
D) K-selection, s-selection
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