Download Bio112HW_5_ Populations

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Bio112HW_5_ Populations
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1. The number of individuals of the same species in some specified area or volume of habitat is the
a. population density.
b. population growth.
c. population birth rate.
d. population size.
e. carrying capacity.
2. What distribution pattern is the most common in the natural world?
a. random
b. uniform
c. clumped
d. stratified or layered
e. bimodal
3. Population size depends upon
a. deaths.
b. births.
c. migration.
d. immigration.
e. all of these
4. The age-structure diagram for rapidly growing populations
a. is in the form of a pyramid.
b. is characterized by a large percentage of the population in the postreproductive years.
c. has a very broad base showing a large number of young.
d. has about equal distribution among all age groups.
e. is in the form of a pyramid and has a very broad base showing a large number of young.
5. Zero population growth is achieved when
a. a population reaches the carrying capacity of the environment.
b. an interval during which the number of births and the number of deaths are balanced.
c. births exceed deaths.
d. deaths exceed births.
e. migration is prevented.
6. Which characteristic of a population is a convenient way to express the rate of change within a population?
a. size
b. growth
c. density
d. carrying capacity
e. age
7. The rate of increase for a population (r) refers to what kind of relationship between birth rate and death rate?
a. their sum
b. their product
c. the doubling time between them
d. the difference between them
e. reduction in each of them
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8. The biotic potential
a. varies from one species to another.
b. is controlled by the timing of the first reproduction.
c. is controlled by the frequency of reproduction.
d. is controlled by the number of offspring produced.
e. all of these
9. Type II survivorship curves
a. are characteristic of humans and elephants.
b. typify a population in which all ages have an equal chance of surviving.
c. indicate a high mortality rate in the very young.
d. show that very few young are produced, that each is given parental support, and that most
individuals live a relatively long life and die of old age.
e. are typical of annual plants.
10. A type III survivorship curve is characteristic of
a. monkeys.
b. horses.
c. eagles.
d. sea urchins.
e. humans.
11. A population that is growing exponentially in the absence of limiting factors can be illustrated by which curve?
a. S-shaped
b. J-shaped
c. one that terminates in a plateau phase
d. bimodal
e. binomial
12. Which density-dependent factor controls the size of a population?
a. wind velocity
b. light intensity
c. nutrient supply
d. rainfall
e. wave action in an intertidal zone
13. Which is NOT a density-dependent, growth-limiting factor?
a. predation
b. drought
c. parasitism
d. competition
e. species interaction
14. Density-independent controls over population growth include
a. parasites.
b. temperature.
c. disease.
d. competition.
e. all of these
15. All EXCEPT which one of the following are the reasons for the rapid population explosion of humans?
a. increases in carrying capacity
b. expansion into new habitats
c. removal of limiting factors
d. reproduction occurring earlier in the life cycle
e. longer generation times
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16. Population size is determined by which of the following?
a. emigration
b. deaths
c. immigration
d. births
e. all of these
17. A group of interbreeding individuals of the same species in the same geographic region is called a(n)
a. community
b. population
c. ecosystem
d. biosphere
e. biome
18. Which of the following is not one of the age structure categories?
a. postreproductive
b. prereproductive
c. reproductive
d. nonreproductive
e. All of these answers are categories.
19. "The maximum population of a given species that a particular habitat can sustain indefinitely without being
degraded" is the definition of
a. logistic growth
b. environmental resistance
c. exponential growth
d. carrying capacity
e. biotic potential
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Population Growth Curves
Use the Figure above to answer the following question(s).
20. Choose the letter that represents when resources are not limiting and a population can grow at an exponential rate
of increase.
21. What term is used to describe the population growth curve (C) as it approaches (B)? _______________________
22. Would the fluctuating growth at (D) represent a density-dependent or density-independent limiting factor?
23. Choose the letter that represents a population's capacity for growth.
24. What term describes line (B)? ___________________________________________
25. Does this population growth curve describe a K-selected or r-selected species?