Ecology Review

Barnacles create home sites by attaching themselves to whales. As the barnacle is a filter

feeder, it also gets access to more water (and more food) due to the relationship. Whale

is unaffected. What type of relationship is this?

• Mutualism

• Commensalism

• Parasitism

• Competiton

A lion hunts, stalks and eats a zebra. What type of relationship is this?

• Mutualism

• Commensalism

• Parasitism

• Predation

Which would be the best example of a mutualistic relationship?

• A cuckoo lays its eggs in the nest of the warbler. The cuckoo’s eggs hatch first and the young kick the warbler eggs out of the nest causing them to die. The warbler raises the cuckoo babies and

  the warbler babies aren’t hatched.

• As bison walk through grass, insects become active and are seen and eaten by cowbirds.

  This relationship neither harms nor benefits the bison.

• Honey guide birds alert and direct badgers to bee hives. The badgers then expose the

  hives and feed on the honey first. Next the honey guide birds eat. Both benefit

• During mating season Bucks (male deer) will butt heads to compete for females.

The rocky material left behind by a retreating glacier forms what is called a moraine. When primary succession occurs on a moraine, which life-forms will help create the soil by breaking down bare rock?

• Insects

• LIchens

• Grasses

• Deciduous Trees

As ecosystems move through the stages of succession, the populations of organisms in them change. Which of the following describes the stage of succession likely to have the most species diversity?

• A newly formed volcanic island

• An agricultural field that has not been plowed for one year

• A temperate forest that has never been cleared by logging

• a field that is regularly mowed

How much energy is transferred from one trophic level to the next in an energy pyramid?

• 90%
• 50%
• 10%
• All of it

How much energy is available at the secondary consumer level if the producer has 100 units of energy available? 

• 10 units of energy
• 100 units of energy
• 1 unit of energy
• 0.1 unit of energy

What may happen if the snowshoe hare was removed from the food web pictured?

• The insects in the habitat would increase.
• The shrew population would decrease due to being only hawk food source.
• The willow tree population would decrease.
• Foxes would dies due to no food source. 

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Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.
• There would be a decrease in the grass/flowers population.
• There would be a decrease in the mice population.
• There would be an increase in the grass/flowers population.

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Name the producers in this food web.

• seagull and fish
• penguin and crab
• phytoplankton and seaweed
• seaweed and zooplankton

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