Ecology Final Review

What is a trophic level?

• the group of organisms within an ecosystem which occupy the same level in a food chain.

• the group of organisms within an ecosystem which occupy the different levels in a food chain.

• when two or more food chains are combined to make a food web

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Which organisms have the most available energy in an energy pyramid?

• Producer
• Consumer
• Decomposer
• Scavenger

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What does biotic mean?

• Living
• Non living
• Man made

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Which is an example of a parasitic relationship?

• a bee pollinates a flower
• a tapeworm takes nutrients from a dog
• an orchid lives in a tree but does not harm the tree

In which type of relationship do both species benefit?

• parasitism
• mutualism
• commensalism

The type of symbiotic relationship that helps one organism, but does not harm or help the other?

• parasitism

• mutualism

• commensalism

a relationship between two in which one species, the predator, feeds on the other species, the prey

• chemosynthesis
• predation
• cellular respiration 
• commensalism

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Tree kangaroos live in the upper branches of trees in the rainforests of Queensland, as well as on the island of New Guinea. This is an example of the tree kangaroos ___.

• niche
• habitat
• community
• population

Starfish are probably the most important predator in the shallow ecosystem because they eat basically anything that they can come across. Their feeding activities control the whole ecosystem. This is an example of the starfish ___.

• habitat
• biotic factors
• tolerance level
• niche

Which statement is correct in describing predator/prey relationships?

• Predators are eaten by the prey

• As the predator population increases, the prey population will increase

• A rise in the population of prey is often followed by a rise in the population of predators.

• The population of predators most often eliminates the population of prey

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