Limiting Factors & Carrying Capacity LE

An environment can support only as many organisms as the available energy, minerals, and oxygen will allow. Which term is best described by this statement?

• Biological Feedback

• Carrying Capacity

• Homeostatic Control

• Biological Diversity

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The size of a mouse population in a natural ecosystem tends to remain relatively constant due to

• the carrying capacity of the environment

• the lack of natural predators

• cycling of energy

• increased number of decomposers

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The reason that organisms can not produce populations of unlimited size is that

• the resources of Earth are finite

• there is no carrying capacity on Earth

• species rarely compete with one another

• interactions between organisms are unchanging

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Four environmental factors are listed below. Which factors limit environmental carrying capacity in a land ecosystem?

A. Energy

B. Water

C. Oxygen

D. Minerals

• A, only

• B, C, and D, only

• A, C, and D, only

• A, B, C, and D

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On which day did the population represented in the graph below reach the carrying capacity of the ecosystem?

• Day 11

• Day 8

• Day 3

• Day 5

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The carrying capacity of a given environment is least dependent upon

• recycling of materials

• the available enrgy

• the availability of food and water

• daily temperature fluctuations

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The graph below shows the number of birds in a population.

Which statement best explains the section X of the graph?

• Interbreeding between members of this population increased the mutation rate.

• An increase in the bird population caused an increase in the producer population.

• The population reached a state of dynamic equilibrium due to limiting factors.

• Another species came to the area and provided food for the birds.

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