Unit 1: CFA 2 Remediation

 Which of the following describes a benefit of biodiversity to an ecosystem?

• decreases the energy flow through the ecosystem

• increases the maximum number of trophic levels

•  increases the maximum biomass of the ecosystem

• allows the ecosystem to withstand environmental changes

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NGSS.MS-LS2-5

The data in the graph most strongly support which explanation about the predator-prey relationship of the model?

• An increasing predator population acts to increase the prey population.

• An increasing prey population acts to decrease the predator population.

• A decreasing prey population acts to limit the size of the predator population.

• Changes in predator and prey populations act independently, without acting

  on one another.

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NGSS.MS-LS2-1

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Based on the trends of the carrying capacity graph, what is the predicted (estimated) population of organisms, in millions, in 1950?

• 2.0 million

• 1.75 million

• 1.25 million

• 1.5 million

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

In An Essay on the Principle of Population, Thomas Malthus observed that an increase in a nation's food production improved the well-being of the populace, but the improvement was temporary because it led to population growth, which in turn restored the original per capita production level. In other words, the Green Revolution enables population growth, but as the population grows, it reaches its carrying capacity. In this regard, what could be considered limiting factors for the Green Revolution?

• fuel to run farm equipment

• chemical-resistant pests

• manpower participation

• space and water

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NGSS.MS-ESS3-4

Sustainable use is often defined as the use of natural resources at a rate that meets the needs of the present human population but which also allows future generations to use the resource to meet their needs. Which of these BEST illustrates the concept of sustainable use?

• A logging company reseeds and replants in a forested area after cutting down trees for timber.

• Coal is mined using underground tunnels to avoid the destruction of surface soils by strip mining.

• A fishing trawler uses a large net to catch a school of small fish.

• Crops are rotated in a farmer's field to maximize grain yields.

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NGSS.MS-ESS3-4

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