Population Practice Test Flashcards
which of the following best describes a popualtion
members of the same species living in the same place at the same time
identify the population graph
exponential
what type of population growth is represented by this graph
logisitic
if a population grows larger than its carrying capacity, the
death rate must increase
these are
dispersion patterns
what is represented by this graph (limiting factor)
range of tolerance
developing countries tend to have a what shaped age structure diagram
pyramid like
Populations whose age structure diagrams are narrower at the bottom than at the top have
declining population
A biologist marks 20 grasshoppers with paint are releases them. She then recaptures (over several trials) 200 grasshoppers, 50 of which are marked. Estimate the population size using the Lincoln Index.
80
based on birth rates and death rates, in which stage of demographic transition is the population growth rate the greatest?
2
maximum ability to produce offspring in ideal conditions
biotic potential
The largest population size that a given environment can support sustainably
carrying capacity
Factors such as competition for food and spread of disease
density dependent limiting factors
Thomas _______ predicted that the human population would grow faster than the resources needed to sustain the population can be produced.
Malthus
The total fertility rate (TFR) is an estimate of
the number of children each woman in a population will have on average
Population growth rates are high in developing countries because…
children are often an important economic advantage.
Using the rule of 70, a population growing at a 5% growth rate would double in size in
14 years
A particular country has a Total Fertility Rate equal to replacement level fertility and emigration equal to immigration. Which of the following must be true?
The population must be stable.
Which of these describes a K-selected species?
stable populations, produce small numbers of offspring that are larger and receive parental care
Which of the following is true of the demographic transition model as a country transitions to industrialization?
the death rate drops, followed by a drop in birth rates
According to the theory of demographic transition, the most rapid population growth occurs during phase
2
According to the theory of demographic transition, the highest birth rates and death rates are likely to occur during phase
1
Density-dependent factors are limiting factors whose effects are ___.
determined by the degree of competition for a resource
A sample was taken in a field that measured 100 square meters to count the number of milkweed plants. It was divided into a 10 x 10 grid, and 5 sections were randomly selected to sample. The results were 2, 5, 1, 3, and 2 plants in the samples. Estimate how many milkweed plants are in this field.
260
Calculate the population density for an area of 500 km2 with a population of 200 individuals.
0.4
What is the replacement level fertility rate?
2.1
In a human population, the population momentum effect is most likely to occur in cases in which a large percent of the people in a population are in which age group?
younger than 19 years old
What is the birth rate (as a percentage) for a population of 950,000 people with 25,000 births?
2.63%
A population of 744,700 people has 44,600 immigrants and 12,570 emigrants. They also experience 15,900 deaths and 35,670 births. Find the growth rate.
6.96%
How many years will it take a population to double with a growth rate of 7%?
10 years
Using the mark and recapture technique, a scientist collected 20 horseshoe crabs and marked them with a tag. The 20 marked crabs were then released back into the wild. The scientist returned later and recaptured crabs. They repeated the release and recapture process many times. The data is shown in the table. Estimate the population size using the Lincoln Index.
80
