Understanding Population Dynamics and Distribution

What is the definition of population density?

• The total number of individuals in a population.

• The number of individuals per unit area or volume.

• The variety of species within a given ecosystem.

• The rate at which a population increases.

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DOK Level 1: Recall

Which type of animals are typically found in low-density areas?

• Herd animals like elephants.

• Solitary animals like tigers.

• Social insects like ants.

• Schooling fish like sardines.

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DOK Level 1: Recall

What type of distribution pattern is most likely observed in territorial species?

• Random distribution

• Clumped distribution

• Uniform distribution

• Circular distribution

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DOK Level 2: Skill/Concept

Why is random distribution uncommon in nature?

• Because resources are evenly distributed.

• Because environmental conditions are uniform.

• Because resources and conditions are rarely uniform.

• Because animals prefer to live in groups.

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DOK Level 2: Skill/Concept

What are density-independent limiting factors?

• Factors that affect population size regardless of the population's density.

• Factors that increase in effect as the population density increases.

• Factors that only affect small populations.

• Factors that are controlled by the population itself.

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DOK Level 1: Recall

Explain the difference between exponential growth and logistical growth in populations.

• Exponential growth is linear, while logistical growth is exponential.

• Exponential growth occurs when resources are limited, logistical growth occurs when resources are unlimited.

• Exponential growth shows a J-shaped curve, while logistical growth shows an S-shaped curve.

• Exponential growth is constant, while logistical growth fluctuates.

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DOK Level 2: Skill/Concept

What factors determine population growth?

• Birth rate, death rate, immigration, and emigration.

• Only birth rate and death rate.

• Only immigration and emigration.

• Predation and competition.

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DOK Level 1: Recall

What type of distribution will we see when animals are social?

• Random distribution

• Clumped distribution

• Uniform distribution

• Linear distribution

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DOK Level 2: Skill/Concept

What are density-dependent limiting factors?

• Factors that affect population size regardless of the population's density.

• Factors that increase in effect as the population density increases.

• Factors that only affect large populations.

• Factors that are controlled by the population itself.

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DOK Level 1: Recall

What is the carrying capacity of an environment?

• The maximum number of individuals an environment can support sustainably.

• The total number of species in an ecosystem.

• The rate at which a population grows.

• The number of resources available in an environment.

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NGSS.MS-LS2-1