Age Structure

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Animation: Age structure

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Animation Assessment

Question 1 of 5

Above are three generalized age pyramid structures. Males are on the left in blue, females are on the right of the central line in red. Which histogram most likely represents a country with a declining population growth rate?

Question 1 choicesChoice A., histogram aChoice B., histogram bChoice C., histogram c

Correct.

Incorrect.

Question 2 of 5

Which of the histograms above most likely represents a country with the highest population growth rate?

Question 2 choicesChoice A., histogram aChoice B., histogram bChoice C., histogram c

Correct.

Incorrect.

Question 3 of 5

Consider five human populations that differ demographically only in their age structures. The population that will grow the most in the next 30 years is the one with the greatest fraction of people in which age group(s):

Question 3 choicesChoice A., the oldest age groupChoice B., the middle of the reproductive age groupsChoice C., the late-reproductive and post-reproductive age groupsChoice D., the middle of the age structureChoice E., the pre-reproductive age groups

Correct.

Incorrect.

Question 4 of 5

The expanding base of a population pyramid over time indicates which of the following?

Question 4 choicesChoice A., The average age of the population is increasing.Choice B., The number of older people in the population is increasing.Choice C., The number of people of reproductive age in the population is increasing.Choice D., The number of younger individuals in the population is increasing.

Correct.

Incorrect.

Question 5 of 5

Why are biologists interested in age structures of populations?

Question 5 choicesChoice A., because age structures provide information about current reproductive rates in the populationChoice B., because age structures provide information that allows the estimation of a population’s potential for future growthChoice C., because age structures provide information about the number of individuals in a population that are of a reproductive age

Correct.

Incorrect.

Assessment Summary

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