Ecology Study Quiz

Suppose that a species of toads is introduced into a new environment in an attempt to reduce the population of insects. The toad has no natural predators in the new environment. The toad population would most likely

• increase exponentially.
• increase logistically.
• decrease rapidly and die out.
• remain the same.

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The graph in Figure 5–1 shows the growth of a bacterial population. Which of the following correctly describes the growth curve?

• logistic
• limiting
• demographic
• exponential

The various growth phases through which most populations go are represented on

• a logistic growth curve.
• an exponential growth curve.
• a normal curve.
• a population curve.

If a population grows larger than the carrying capacity of the environment, which of these is most likely to happen?

• The death rate may rise.
• The birthrate may rise.
• The death rate must fall.
• The birthrate must fall.

Ideally, sustainable development should

• put the protection of the environment ahead of human needs.
• provide for human needs at the expense of the environment.
• use more natural resources to make goods to meet human needs.
• preserve ecosystems while providing for human needs.

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The goals of biodiversity conservation include all of the following EXCEPT

• protecting individual species
• introducing exotic species into new environments.
• preserving habitats and ecosystems.
• making sure local people benefit from conservation efforts.

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As DDT moves up the trophic levels in food chains or food webs its concentration

• stays the same. This is called equilibrium.
• increases. This is called biomagnification.
• decreases. This is called biominimization.
• is eliminated. This is called bioelimination.

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Breathable air and drinkable water are

• always free to everyone.
• examples of ecosystem goods and services.
• not easy to find in healthy ecosystems.
• provided by city governments.

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What is one negative consequence of the Industrial Revolution?

• fewer jobs for people living in cities
• more expensive clothes
• environmental harm from the burning of fossil fuels
• people working longer hours at their jobs

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Biodiversity is valuable partly because it

• gives us interesting things to look at.
• tells us about many other species.
• contributes to medicine and agriculture.
• provides humans with resistance to disease.

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