Ecology Unit Test Review

What is the relationship between the snake and the mouse in this food web?

• The snake is a primary producer and the grasshopper is a tertiary consumer

• The snake is a predator and the mouse is its prey

• The mouse is a parasite and the snake is the host

• The snake is a tertiary consumer and the mouse is a primary consumer

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What is the relationship between the Polar Bear and the Orca in this food web?

• They are producers

• They are decomposers

• They are competitors

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Excess nitrogen fertilizers sometimes drain into waterways that flow into the Galveston Bay. This nitrogen may cause algae blooms, which reduce dissolved oxygen in the water. How does nitrogen negatively affect the Galveston Bay?

• fish births increase

• fish populations decrease

• sediment on the bottom of the bay

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Which of these four species of bear would be most in danger of becoming extinct if one of its food sources became unavailable?

• Brown Bear

• Black Bear

• Polar Bear

• Panda Bear

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Organisms that make their own food are called __________________.

• producers

• consumers

• decomposers

Where does all the energy originate from in a food web?

• All energy comes from the Sun.

• All energy comes from the Moon.

• All energy comes from your Face.

• All energy comes from the Sun.

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Blue whales live in oceans. What type of factors do they rely on for their existence?

• Only biotic factors

• Only abiotic factors

• Both biotic and abiotic factors

• Neither biotic nor abiotic factors

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Which type of interaction exists between shrimp and blue crabs in this food web?

• Shrimp prey on blue crabs.

• Shrimp compete with blue crabs for food.

• Shrimp help blue crabs filter polluted water.

• Shrimp decompose matter for blue crabs

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In this food web, which organism has the greatest number of food sources?

• Snake

• Hawk

• Shrew

• Mouse

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Rainforest are home to a variety of plant and animal species. Most have yet to be discovered. One study in a Brazilian rainforest found 487 tree species, 320 butterfly species and over a thousand species of insects on 2.5 acres of land. With so many different species living within a particular region, this can best be described as –

• Biodiversity

• Species

• Niche

• Food chain

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