Ecology Review

Some students take care of a vegetable garden. When it is time to plant in the spring, the students leave part of the garden empty in order to observe ecological succession. Which of these will most likely occur first?

• Development of the topsoil

• Growth of weeds and grasses

• Growth of trees and shrubs

• Development of a stream

What would happen if the arctic hare was introduced into a new environment without snow and ice?

• The species would become overpopulated.

• The chance of young hares surviving to adulthood and reproducing would be greatly diminished.

• The hare would be a popular target for game hunters.

• All of the above.

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What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.

• The number of primary consumers would increase.

• The number of plants would increase.

• The number of secondary consumers would increase.

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How many producers are in this food web?

• 1

• 2

• 3

• 4

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The path of food energy from the sun to the producer then transferred to a series of consumers is known as a ...?

• Food Web

• Food Chain

• Energy Line

• Energy Transformation

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The building up of an ecosystem after lava or glaciers have left nothing but rock.

• Secondary Succession

• Primary Succession 

• Natural Selection

• Adaptation

Which of the following is a predator-prey relationship in this food web?

• Jackal-Goat

• Rabbit-Green Plant

• Mouse-Owl

• Jackal-Lion

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The picture below shows how runoff from an urban location is routed to the ocean. Pollution in the runoff can damage ocean ecosystems. A likely cause of the runoff is:

• larger amounts of farmland to support more people 

• pavement and concrete prevents water from entering the groundwater 

• increased rainfall in urban areas 

• sediments being deposited in the streams and rivers around urban areas 

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An ecosystem that is not sustainable can break down when a natural disaster occurs. This can lead to organisms in the ecosystem either leaving the area or dying off.

Increased biodiversity results in a more sustainable ecosystem because —

• a greater number of plant species means that there is less barren land

• a greater variety of species present allows more organisms to adapt after changes occur

• the transition area between two ecosystems is narrower

• there are fewer species to be affected by environmental stresses

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Which types of native organisms do feral hogs most likely compete with for food sources?

• carnivores and producers

• herbivores and carnivores

• producers and decomposers

• decomposers and herbivores

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