The figure below shows the logistic growth of a hypothetical population of animals Quizlet

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populations expand when resources such as food, water, and shelter are abundant. under ideal conditions, including unlimited access to food and reproduction at physical capacity, a population will increase exponentially, producing a j-shaped growth curve. however, resources are rarely unlimited, and exponential growth cannot continue indefinitely. the logistic model describes how population growth slows as the population size approaches a habitat's carrying capacity (K)

for a hypothetical mouse population, determine whether the actions described will increase K, decrease K, or not affect K

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Terms in this set (21)

A
What is represented on the x-axis of this graph?

Individuals' life spans as a percentage of the maximum life span for the species

B
Why is a percentage scale used for the x-axis rather than actual ages?

This scale allows you to compare species with widely varying life spans on the same graph.

C
For a species with a Type II curve, less than ____% of individuals survive for 50% of the maximum life span.

10

D
At 50% of maximum life span, how does survivorship for a Type I curve compare to survivorship for a Type III curve?

Survivorship for a Type I curve is nearly 1,000 times as great as survivorship for a Type III curve.

E
For species with a Type III curve, most individuals reach the maximum life span.

Not supported

F
According to this graph, species that exhibit a Type III curve typically produce large numbers of offspring.

Cannot be determined from this graph

G
In species that exhibit a Type II survivorship curve, individuals are no more likely to die at one stage of the life cycle than another.

Supported

A
What is shown on the x-axis?

percentage of the maximum life span of a species

B
Look closely at the scale on the y-axis. What number would be represented by the point midway between the tick mark labeled 10 and the tick mark labeled 100?

approximately 32

C
In a population of 1,000 elephants, how many individuals would survive for 50% of the species' maximum life span?

about 100

D
According to the graph, which modern animal has a relatively constant mortality rate throughout its life span?

starling

E
At 50% of maximum life span, how does the survivorship of Albertosaurus compare to the survivorship of the crocodile?

The survivorship of Albertosaurus is about 100 times greater than that of the crocodile.

F
Is the following statement supported or not supported by the data shown in the graph?
The maximum life span of Albertosaurus was about 100 years.

cannot be determined from this graph

G
Is the following statement supported or not supported by the data shown in the graph?
The mortality rate of Albertosaurus dinosaurs aged between 25% and 50% of their maximum life span was far greater than the mortality rate of dinosaurs that reached 75% of their maximum life span.

not supported

A
For a hypothetical mouse population, determine whether the actions described will increase K, decrease K, or not affect K.
Drag each statement to the appropriate bin.

K increases:
- a main competitor for food is eliminated,increasing food availability
- an abandoned building creates more nesting areas

K decreases:
- a parking lot is built,shrinking the habitat
wetlands are drained, decreasing the amount of available water
- a species with the same food requirements is introduced

no effect on K:
- offspring live longer

B
A population of animals in a specific environment with a K of 2500 has an rmax of 1.0 per individual per year and exhibits logistic growth as follows:
dt=rmaxN(K−N)Ndt=rmaxN(K−N)K
Arrange the following population sizes in order of decreasing growth.
Rank the population sizes (N) from fastest to slowest growth. If two population sizes have the same growth, overlap them. (For help calculating growth, see Hint 1.)

fastest growth

N=1250
N=1500 N=1000
N=750
N=500
N=250

C
Use the data below to make a graph showing the logistic growth of a hypothetical population. Choose one row of data in the table to plot on each axis (shown here as x and y).

Notice that the logistic growth of the population produces an S-shaped curve. If this population underwent exponential growth rather than logistic growth, the curve would be J-shaped, as shown in the graph below.

D
The figure below shows the logistic growth of a hypothetical population of animals.
Drag the labels to their appropriate locations on the graph.

a, K
b. N
C. time
D. r- selection predominated
e. k -selection predominated

A
What prediction(s) can researchers make based on the egg-viability hypothesis? Select all that apply.

- The probability of hatching failure will be higher later in the spring season.
- The probability of hatching failure will be higher in large clutches.
- The probability of hatching failure will be lower at higher latitudes.

B
Review the graphs to determine whether the data support the four predictions.

1. increases, support
2. decreases, support
3. both the largest and the smallest, do not support
4. laid earliest

C
Drag the blue labels to the graph below to indicate what data researchers should plot on the x- and y- axes. Then select the graph line that would support their hypothesis.

clutch size on y-axis
female plumage ornamentation on x-axis
increasing graph

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