Principles of Ecology

In this energy pyramid, which organisms have the most energy available?

• Producers

• Carnivores

• Herbivores

• Top Predator

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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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In the energy pyramid here, how much of the energy in the producers gets passed to the herbivores?

• 10%

• 20%

• 80%

• 90%

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What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.

• The specific ways that mutualism is carried out.

• A single pathway or energy flow between organisms. 

• How carnivores get their food. 

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The following statement is a hypothesis formed about marsh grass: 
If the amount of nitrogen marsh grass receives is increased, then the height of the grass will increase, because nitrogen is an essential nutrient needed for marsh grass to grow.
What is the independent variable of the statement above? 

• Height of grass

• Amount of nitrogen

• Essential nutrient

• Amount of growth

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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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A food chain is illustrated below:
The arrows represented most likely indicate

• Energy released from metabolism into the environment as heat.

• Oxygen released from metabolism produced by cellular respiration.

• The absorption of energy from the environment that has been created.

• The transport of glucose away from the organism through photosynthesis.

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The temperature, rainfall, and soil/sand in an ecosystem would all qualify as

• a whole ecosystem

• abiotic factors

• biotic factors

• living things

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A group of Arabian wolves living in Ras AlKhaima is an example of

• a community

• a biome

• an ecosystem

• a population

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Which organisms in the food chain have the least available energy?

• large fish

• algae

• shark

• small fish

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