Carrying Capacity Test_25.26 - Newcomer International Center | Knihovna

1

A population of rabbits increases rapidly over several years. After that time, the population growth rate slows and levels off. What best explains why the population stops increasing?

The population reaches a fixed number that cannot change

The population chooses to stop growing because individuals do not want to reproduce

Predators eliminate most individuals in the population

Increased competition reduces birth rates and increases death rates

1

Which organism interaction is most likely to directly limit population growth when resources become scarce?

Mutualism

Competition

Commensalism

Migration

1

Which description best represents logistic population growth?

Population size increases rapidly without slowing

Population size increases at a constant rate

Population size increases rapidly, then levels off

Population size decreases continuously over time

1

What does carrying capacity (K) represent in a population graph?

The population’s preferred size

The maximum population size the environment can support

The population size at extinction

The initial population size

1

As population size increases, which change is most likely to occur?

Increased availability of resources

Decreased competition

Increased competition for limited resources

Increased habitat space for raising offspring

1

Which situation best demonstrates negative feedback in an ecosystem?

Increased prey leads to increased predators, which slows prey population growth

Increased sunlight leads to increased plant growth

A population migrates to a new habitat

An invasive species spreads without limits, causing other populations to increase

1

A drought reduces the amount of available water in an ecosystem. What is the most likely effect on carrying capacity?

Carrying capacity increases

Carrying capacity remains fixed

Carrying capacity decreases

Carrying capacity disappears

1

Which factor is abiotic (non-living) and can limit population size?

Predation

Competition

Disease

Available space

1

An invasive species is introduced into an environment. What will likely happen to native populations?

The invasive species will compete with the native populations, slowing native population growth.

Native populations will increase exponentially as they begin to eat the invasive species.

Native populations will adapt instantly and their population sizes will not change.

Resources will increase temporarily, causing the native populations to increase and then decrease.

1

Which statement best describes carrying capacity?

It is the same for all ecosystems and all environmental conditions.

It depends on organism interactions and resource availability.

It never changes.

It applies only to animal populations.

1

Which factors can contribute to negative feedback in populations? (Select ALL that apply.)

1

Which organism interactions can affect carrying capacity? (Select 4.)

1

Which observations suggest a population is approaching carrying capacity? (Select 3.)

Population growth rate slows

Population size levels off

Competition increases

Resources become unlimited

1

Which changes could decrease carrying capacity? (Select 2).

Loss of habitat space

Increased resource production

Introduction of a strong competitor

Decreased predation

1

Which statements about carrying capacity are supported by scientific evidence? (Select 2.)

Carrying capacity can change when conditions change.

Carrying capacity is fixed for each species.

Carrying capacity depends on interactions and resources.

Carrying capacity is always the same across ecosystems.

1

Which examples correctly illustrate effects on carrying capacity? (Select 2.)

Decline in bees reduces plant reproduction

Removal of predators increases prey population size

Increased rainfall decreases plant growth

Competition for territory causes populations to grow