# Population Ecology 1

12 Questions

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• 1.
The growth rate of a population is expressed as:
• A.

B-d

• B.

I-e

• C.

K-N

• D.

DN/r

• E.

(K-N)/K

• 2.
• A.

Increases

• B.

Decreases

• C.

Is stable

• D.

May increase or decrease, depending on K

• E.

May increase or decrease, depending on i

• 3.
• A.

Rapidly increase

• B.

Slowly increase

• C.

Slowly decrease

• D.

Rapidly decrease

• E.

Stabilize

• 4.
At zero population growth:
• A.

B=d

• B.

B>d

• C.

B

• D.

R>0

• E.

None of the responses are correct

• 5.
• A.

True

• B.

False

• 6.
Plotting rmax would show the maximum exponential growth rate of the population
• A.

True

• B.

False

• 7.
The logistic equation:
• A.

Models a J-shaped curve

• B.

Takes into account the carrying capacity of the environment

• C.

Shows continued exponential growth

• D.

Would characterize the uncontrolled growth of a population

• E.

Models a K-shaped growth curve

• 8.
Logistic growth of a population is represented by dN/dt =
• A.

RN/K

• B.

RN

• C.

RN((K-N)/K))

• D.

RN((N-K)/K))

• 9.
Exponential growth of a population is represented by dN/dt =
• A.

RN/K

• B.

RN

• C.

RN(K+N)

• D.

RN((K-N)/K))

• E.

RN((N-K)/K))

• 10.
All of the following statements about the logistic model of a population growth are correct EXCEPT:
• A.

It fits an S-shaped curve

• B.

It incorporates the concept of carrying capacity

• C.

It describes population density shifts over time

• D.

It accurately predicts the growth of most populations

• E.

It predicts an eventual state in which birth rates equal death rates

• 11.
As N approaches K for a certain population, which of the following is predicted by the logistic equation?
• A.

The growth rate will not change

• B.

The growth rate will approach zero

• C.

The population will increase exponentially

• D.

The carrying capacity of the environment will increase

• 12.
In the logisitc equation dN/dt = rN, ((K-N)/K)), r is a measure of the population's intrinsic rate of increase. It is determined by which of the following?
• A.

Birth rate

• B.

Death rate

• C.

Density

• D.

Both A and B are correct

• E.

A, B and C are correct