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Discussing Population Dynamics and Structure

The most critical factor in controlling the human population growth is
A. controlling reproductive lifespan.
B. decreasing the time of first birth
C. decreasing the average number of births per woman
D. decreasing infant death

Populations of predators increase when the population of prey is high because...(Please highlight all that apply).
A. predator's nutrition is better.
B. it is easier to find a prey.
C. the prey population may be weakened by competition for resources.
D. reproductive output may increase.

Energy and matter flow through ecosystems. Matter flows in a cycle called _____.

Water and temperature affect the type of vegetation that grows in a region. Which statement(s) are true? Highlight all that apply.
A. As one goes from the equator to the poles, the temperature gets colder.
B. As one goes from low altitude to high altitudes, the temperature gets colder.
C. As one goes from low altitude to high altitudes, the temperature gets warmer.
A. As one goes from the equator to the poles, the temperature gets warmer

Shallow regions of lakes and oceans is where most life exists. True or False.

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The most critical factor in controlling the human population growth is
A. controlling reproductive lifespan.
B. decreasing the time of first birth
C. decreasing the average number of births per woman
D. decreasing infant death

Two of these answers would actually result in an increase in population growth. First, decreasing the time of the first birth (B) means that women would give birth to their first child at a younger age, thus making it possible to have more children during their reproductive years. Also, decreasing the infant death rate (D) would increase the population size because more offspring would survive to become part of the reproductive population. Controlling reproductive lifespan (A) seems like an unmanageable option for controlling human population size, but decreasing the average number of births per woman (A) is much more viable (for instance, in China where they limit families to 2 children).

Populations of predators increase when the population of ...

Solution Summary

In about 650 words, this solution discusses many important ecological concepts such as predator and prey dynamics and demographics. Each question is analyzed thoroughly, with reasoning for each correct answer provided.

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