Ecology Review

Barnacles attach themselves to whales. The whales are so large that they are seemingly unaffected. The barnacles get a habitat and food when the whale enters an area with abundant food resources. What type of relationship exists between the whale and the barnacle?

• mutualism
• commensalism
• parasitism
• predation

Animals, such as fiddler crabs, advertise the size of their enlarged claw to intimidate their rivals. This territorial display is an example of what type of relationship?

• predation
• commensalism
• competition
• mutualism

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NGSS.MS-LS2-2

Which scenario would best allow the long-term survival of a native herbivore in a grassland ecosystem? 

• New producer species immigrates to the ecosystem and increases the diversity of producers. 
• The population size of the herbivore's predators and the grasses they eat remain constant. 
• Humans in the ecosystem reduce the number of predators in the area. 
• A new herbivore that feeds on the same plants immigrates to the ecosystem 

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NGSS.MS-LS2-4

NGSS.MS-LS2-2

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What best describes the type of relationship that occurs between grasshoppers and mice? 

• Commensalism
• Predation
• Mutualism
• Competition

Tags

NGSS.MS-LS2-2

According to the food web, which of the following organisms can be classified into more than one trophic level? 

• grasshopper
• owl
• rabbit
• frog

Tags

NGSS.MS-LS2-2

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What's missing from the food web?

• decomposers
• producers
• consumers
• autotrophs

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Oxpeckers are birds that sit on zebras and rhinos and eat ticks and other parasites that live on their skin. The oxpeckers get food and in return the zebras and rhinos get pest control. When there is danger, the oxpeckers fly upward and scream a warning to help the zebras and rhinos.  Which of the following correctly identifies the symbiotic relationship between the oxpeckers and the zebras? 

• parasitism
• commensalism
• mutualism
• competition

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NGSS.MS-LS2-4

A food chain contains oak trees (producer), mice (herbivore), black rat snakes (carnivore), and bald eagles (carnivore). If these organisms were placed in an energy pyramid, which organism would be in the energy level with the second-most amount of energy available? 

• Mice
• Oak Trees
• Bald Eagles
• Black Rat Snakes

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NGSS.MS-LS2-3

Which of the following correctly lists the flow of matter in the food web above? 

• plants, animals, nematodes, arthropods
• animals, nematodes, arthropods, plants
• plants, nematodes, arthropods, animals
• nematodes, plants, arthropods, animals

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NGSS.MS-LS2-2

NGSS.MS-LS2-3

Yeast was added to a flask containing a water/nutrient mixture, and the yeast population was monitored over a twenty-four hour period. The results are shown on the graph above.

The graph shows that after 16 hours, the yeast population — 

• is close to the food source sustainability of its habitat 
• is beginning to feed on itself 
• could continue reproducing at an increasing rate 
• is about to increase dramatically in population 

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NGSS.MS-LS2-1

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