Ecology Unit Test Review

An ecological pyramid is sometimes used to show both the flow of matter and energy in an ecosystem. The pyramid narrows as matter and energy flow from the bottom to the top. What does this pyramid tell you about the energy in this ecosystem?

• Energy stays the same. Only the number of living things change.
• Energy decreases from the top to the bottom as organisms are larger in size.
• Energy increases from bottom to top because the organisms get larger in size.
• Energy decreases from bottom to top because some is used at each level for life processes.

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NGSS.MS-LS2-3

If phytoplankton and bacteria contain 20,000 joules from the sun, how many joules would be found at the predator fish level?

• 20 joules
• 200 joules
• 2000 joules
• 2 joules

Tags

NGSS.MS-LS2-3

 A population can grow exponentially only for short periods of time. Eventually, it would deplete all the resources necessary for its survival. Over long periods of time, populations tend to attain an equilibrium population size which is determined by the available resources.  Analyze the graph. What type of graph is used to show continuous growth of a population with not chance of a limiting factor?

• Exponential Growth Chart
• Logistic Growth Chart
• Population Pyramid
• Population Pie Chart

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NGSS.MS-ESS3-4

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In more realistic enviroments, as population increases resources will decrease and populations will reach an equalibrium.  This type of growth is shown on a _______________ growth curve.

• Exponential 
• Logistic
• Emmigration
• Death Rate

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NGSS.HS-LS2-1

NGSS.HS-LS2-6

Just by looking at the line on the graph, what can you conclude about how Cadmium Dosage affects the survival rate of Bullfrogs.

•  The line graph shows that the survival rate of bullfrogs increases as the amount of Cadmium decreases.
• The line graph shows that the survival rate of bullfrogs increase the Cadmium levels increase.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following organism would be harmed the most if the population of kangaroo rats drastically decreased?

• Mojave Rattlesnakes
• Jackrabbits
• Desert Sage Brush
• Cougar

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Suppose a small river with a population of 10,000 frogs becomes polluted with cadmium to a level of 3 mg per gallon per day. About how many bullfrogs would be expected to die?

• 7, 000 bullfrogs
• 3,000 bullfrogs
• 1,000 bullfrogs
• 0 bullfrogs

Tags

NGSS.HS-LS2-6

NGSS.HS-LS4-5

Review the desert food web above. What organism, absent in the web, would be MOST responsible for recycling organic matter back through the food web?

• Cougars
• Bacteria
• Sage Brush
• Cactus Plants

Tags

NGSS.MS-LS2-3

As lions hunt for food, they must not only be strong and quick, but they must also have the correct fur coloring in order to not be noticed by potential prey. Which mane color would be BEST suited for hunting in the grasslands during a period of drought, when most of the grasses were beginning to die?

• black
• brown
• green
• white

Tags

NGSS.MS-LS4-4

In an ecosystem, which is of the following would be a density independent example that would decrease a population?

• predation
• disease
• food shortage
• any natural disaster (fire, volcano eruption, hurricane) 

Tags

NGSS.MS-ESS3-2