a
Which of the following species is a K-selected species?
true
R-selected species have a short life span and an early reproduction cycle.
a
Which of the following statements about tolerance range is true?
true
A population’s distribution can be even, clumped, or random.
a WRONG
Identify the biotic limiting factor from the choices below.
c
Which of the following statements is true?
b WRONG
When population growth increases in an area, what is happening to the birth rate and age structure of that population?
d
Which of the following factors would have the least effect on the carrying capacity of an ecosystem?
c
Lions live in groups called prides. Lion populations would most likely fall in which category of population distribution?
b
How does population density differ from population size?
c
A species that has experienced a severe bottleneck event would be expected to _______.
false
Bottleneck events are always caused by the death of most of a species’ population.
false
The bottleneck event that the cheetah went through in the last ice age ultimately resulted in a stronger, more robust species.
true
The unusual maintenance of genetic diversity among the Mouflon in the Indian Ocean after a severe reduction in their population is mostly due to environmental pressures on the island where they lived.
a
The bottleneck event that decimated the bison was caused by _______.
c
Which of the following factors have not led to the recovery of the plains bison gene pool?
true
The Amish are an example of a population where the founder effect has resulted in generally rare genetic traits being more commonly expressed.
d
R-organisms reproduce at a very high rate. Knowing this, why don’t they usually reach their carrying capacity?
c
The disproportionately high appearance of polydactylism among the Amish suggests that _______.
a WRONG
Genetic drift, the founder principle, and the bottleneck effect all occur under what conditions?
a
When tagging animals specifically for the study of population size, scientists must do all of the following EXCEPT:
false
A larger population density always indicates a larger population size.
c
Which of the following methods involves counting the number of organisms in a specific area?
d
If China has a population of 1,355,935,022 people and an area of 3,705,405 mi2, what is the population density of China?
true
The three methods for determining population size are observation, mark and recapture, and sampling.
c
The formula to calculate population density is _______.
true
Logistic growth curves are density-dependent.
c WRONG
Which of the following samples has the greatest population density?
a
Which of the following statements about exponential growth curves is true?
a
Yellowstone National Park has an average of about 4500 bison living in it. The park covers 3472 square miles. What is the population density of bison living in Yellowstone?
d
Which of the following is not a reason for cluster distribution of organisms?
d WRONG
Why do disruptive selection pressures tend to favor rapid evolutionary changes?
b
Stabilizing selective pressures result in _______.
b
Natural selection is an evolutionary mechanism by which _______.
false
Directional selection only occurs in response to naturally occurring events.
c
Which of the following is the most obvious sign of cluster distribution in termites?
false
Stationary population pyramids are representative of countries with shorter than average life expectancies.
true
Natural selection does not always result in an increase in genetic diversity.
false
The native range of a species includes all areas in which it lives.
b
Which of the following is true about human population distribution by age and gender?
a
Which of the following is not a part of Darwin’s theory of evolution?
true
Similarities between seemingly unrelated organisms can be explained by Darwin’s theory that organisms come from common ancestors.
b
Which of the following is an example of a behavioral adaptation?
false
Plants do not adapt to their environment because they do not compete for resources.
c
Which of the following is an example of a biochemical adaptation?
c
In the guppie simulation, what happens to the brightest guppies when there are large numbers of predators?
false
Organisms do not adapt as a result of competition for resources.
true
Charles Darwin spent over 20 years developing his theory of natural selection.
false
Organisms that have a physical trait that makes it easier for them to access food supplies are unlikely to pass on that trait to their offspring.
b
Which of the following is a physiological adaptation?
b
According to the pie chart, which cause results in the most extinctions?
b
Which would be the most accurate title for this picture?
b WRONG
Which statement best describes ecological succession?
b
A hunter illegally kills a wolf in Yellowstone National Park and attempts to bring the wolf’s skull back to Florida. Which law is the hunter violating?
b
From June to September 1988, 51 different wildfires started in Yellowstone Park. By the end of the summer, approximately 794,000 acres of the park were affected, which included about 24 percent of the whitebark pine forest population, many lodgepole pine stands, and a variety of other plants and animals. Which type of change was seen in the ecosystems that were affected by the 1988 fires in Yellowstone Park?
b
Why are lichens a good pioneer species after a volcanic eruption?
b WRONG
What is most likely to result immediately after a rainforest in Brazil is clear-cut?
a WRONG
Which of the following could result in secondary succession?
c
In one species of bird, there are three varieties of feather color. What is this an example of?
b
Rhinoceroses are being poached at a rate of two or three a week in Africa and Asia. Which type of diversity is being lost as the population of rhinoceroses becomes very small?
d
Which of the following species would you most expect to be distributed according to a regular pattern?
d
Which of the following is most likely an example of genetic drift resulting from the founder effect?
a
Which of the following selection pressures is responsible for the limited evolutionary changes experienced by alligators and other crocodilians?
c
What discovery led Darwin to develop his theories on adaptation?
d
For which method of determining population size is the population not aware of the sampler’s presence?
false
The total number of organisms an ecosystem can support is its tolerance range.
d
Which of the following statements about logistic growth curves is true?
a
Which of the following conditions would lead to a small population size?
a
Orange trees planted in an orchard would most likely fall in which category of population distribution?
a
Deer run in zigzag patterns when being chased by predators. What type of adaptation is this?
c
There are approximately 35,000 bald eagles in Alaska, which covers 586400 square miles. What is the population density for the bald eagles in Alaska?
Genetic drift occurs when random events, such as natural disasters, reduce a species’ population. This reduction in population size is often accompanied by a redistribution of the frequency of the expression of certain genes based on what genes the surviving organisms possess.
How do natural disasters contribute to genetic drift?
