Week 4 Extra Problems - IB 150

Which of the following statements are true of a population at carrying capacity?

- The population growth rate equals zero. - The birth rate equals the death rate. - The rate at which resources are used is equal to the rate at which they are supplied.

Which of the following statements are true of logistic growth?

- When the population reaches carrying capacity, it stops growing. - As the population approaches carrying capacity, it grows more slowly.

K increases

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

K decreases

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

10,000 kcal of producer could support approximately ____ kcal of tertiary consumer.

10

Approximately ______% of the energy at one trophic level is passed on to the next highest trophic level.

5-10

Which processes increase a population's size?

Births and immigration

Which of the following statements about density-independent growth is true?

Density-independent growth is also known as exponential growth.

Which of the following statements about a population experiencing logistic growth is true?

If N is greater than K, the population will shrink.

Exponential growth

J-shape curve

Logistic growth

S-shape curve

True or false? Factors that determine the per capita rate of increase of a population include the age of breeding and the number of offspring produced each year.

True

Which of the following conditions would a population most likely experience exponential growth?

Young populations with few individuals.

Which of the following factors does not contribute to environmental resistance?

birth rate

________ are secondary consumers.

carnivores

Density- dependent factors such as nesting space and food availability affect ...

carrying capacity

Which factors does not affect a habitat's carrying capacity?

genetic variation in the population

As a population approaches carrying capacity, environmental resistance _______.

increases

no effect on K

offspring live longer

logistic growth rate equation

∆N/∆T = rN x (K-N)/K