Ecology Review

a small marine fish, periodically cleans harmful parasites from the mouth and body of the moray eel. The moray, in turn, protects the wrasse from larger predators and provides it with a constant supply of food.

• competition

• mutualism

• parasitism

• predator

Leeches attach to the tongue of a crocodile and consume the crocodile’s blood as food

• mutualism

• prey

• parasitism

• commensalism

Clownfish find shelter from predators in the poisonous tentacles of sea anemones.

The clownfish clean the tentacles of the sea anemone and scare off predators. What type of relationship is this?

• family

• parasitism

• competition

• mutualism

Based on the image, which answer best describes the relationship between hawks and coyotes?

• Coyotes and hawks compete for the same food.

• They are both the same species.

• Coyotes are predators of hawks.

• They don't live in the same ecosystem.

Lisa is helping build birdhouses in an effort to attract more purple martins to her area. Building purple martin birdhouses has been shown to increase the size of populations of this bird, which have declined in recent years. What limiting factor must her area have that decreases purple martin populations?

• water

• shelter

• prey

• snhin

Based on the table above, what is the role of the hawk in this food web?

• niche

• primary consumer

• producer

• Tertiary

plants, rocks, air, sunlight, water, 

• ecosystem 
• population 
• community 

a bird 

• abiotic 
• biotic 

the sun 

• abiotic 
• biotic 

What effect would the removal of the bird population have on the state of dynamic balance present in the food web?

• Populations of mice would decrease.

• Populations of owls would increase.

• Populations of grasshoppers and grains would increase.

• There would be no change.