Ecology: Question Preview (ID: 30832)

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Secondary succession begins with _______
a) bare rock
b) soil
c) water
d) air

A native species and a non-native species are competing for resources within the same ecosystem. The non-native species is more likely to survive than the native species in which of the following situations?
a) Both the native species and the non-native species thrive on the same food source.
b) The non-native species has no natural enemies in the ecosystem.
c) Predators prey on both native and non-native species.
d) Native species are not from the area.

One organism benefits and the other neither benefits nor is harmed
a) Mutualism
b) Parasitism
c) Commensalism
d) Neutralism

What is the best explanation of why the numbers of organisms at each trophic level decrease from the bottom of the pyramid to the top?
a) The organisms increase in size as you move up the pyramid.
b) Energy is used for life processes and lost as heat at each trophic level
c) Energy is wasted at each trophic level.
d) Pyramids are small and only have producers.

A lichen is composed of two organisms, a fungus and a cyanobacterium. The fungus provides nutrients to the cyanobacterium. The cyanobacterium provides food to the fungus. This relationship an example of ?
a) Mutualism
b) Commensalism
c) Bacteria
d) Parasitism

Which organisms helps to reduce overpopulation in a deer herd?
a) parasites and predators
b) parasites and scavengers
c) primary consumers and predators
d) Primary consumer and parasites

A hook worm is a parasite that feeds off its host organism, this is an example of a ______________.
a) Producer
b) Mutualism
c) Parasitism
d) Commensalism

How much energy is transferred within one trophic level of the energy pyramid.
a) 100%
b) 10%
c) 20%
d) 50%

Eliminating an organism from an ecosystem would have which of the following effects
a) increased carbon dioxide available to plants
b) help balance the ecosystem
c) food chains would be disrupted
d) Plants will die and go extinct.

Which is an example of primary succession?
a) A land mass that has been plagued by fires and regrows new vegetation.
b) A volcanic eruption that forms bare rocks as its land mass.
c) An earthquake that breaks land.
d) Forrest fire lasting more than 1 week.

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