Environmental Science Chapter 4: Population Ecology

According to the population pyramid, will this population increase, decrease, or remain stable over time?

• Increase

• Decrease

• Stay the same

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Humans have a type I survival curve. What does this mean?

• Their chance of survival increases with age

• Their chance of survival decreases with age

• Their chance of survival is not dependent on age

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What are some factors that can decrease a population's size?

• Immigration and births

• Emigration and deaths

• Clumped populations

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What are some factors that can increase a population's size?

• Immigration and births

• Emigration and deaths

• Clumped populations

What do we call characteristics of the environment that can limit population growth?

• Limiting factors

• Biotic factors

• Immigration

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What is an example of a limiting factor that is caused by the environment?

• Floods

• An organism's gestation time

• The color of an organism

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What is an example of a limiting factor that is caused by an organism's biotic potential?

• Its gestation time

• Flooding

• Hurricanes

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In which distribution pattern are individuals in a population evenly spaced out?

• Random

• Uniform

• Clumped

True or False: Scientists determine population size by counting every single individual in a population.

• True

• False

Answer explanation

Scientists typically use sampling techniques instead as counting individuals can be difficult for a number of reasons.

True or False: Habitats and ecosystems are the same thing.

• True

• False

Answer explanation

Habitats only include what an organism directly interacts with. Ecosystems are more broad.