Unit 5 part 1

Which of the following pathways indicate how nitrogen is added to the largest nitrogen reservoir?

• Nitrifying bacteria and lightning

• Decomposing plant and animal material

• Denitrifying bacteria and volcanic activity

• Nitrates taken up by plant roots

Based on the diagram, which group of organisms would be considered herbivores?

• Snakes

• Mice

• Grasshopper

• Grasses

Traveling southward from the Arctic regions of Canada to the tropics of Panama, one passes through several biomes - tundra, coniferous forest, temperate deciduous forest, and tropical rain forest. This pattern of change in vegetation is primarily the result of

• primary and secondary succession

• the invasion of exotic species

• an increase in both mean annual temperature and mean annual precipitation

• an increase in the total annual hours of sunlight

Tags

NGSS.MS-LS2-3

How does the burning of fossil fuels contribute to the net increase in atmospheric carbon?

• Photosynthesis is reduced by virtue of increased smoke and haze.

• Carbon released by the burning is not in a form that can be readily absorbed by plants, leaving residual carbon in the atmosphere.

• Carbon that has been sequestered underground is added to the carbon cycling between the atmosphere and the biosphere.

• Carbon released by the burning is more easily absorbed in the atmosphere than that produced by natural means.

• Carbon released by the burning increases plant growth, producing more carbon for the atmosphere.

Tags

NGSS.HS-ESS2-6

NGSS.HS-LS2-5

The net annual primary productivity of a particular wetland ecosystem is found to be 8,000 kcal/m2 per year. If respiration by the aquatic producers is 12,000 kcal/m2 per year, what is the gross annual primary productivity for this ecosystem, in kcal/m2 per year?

• 4,000

• 8,000

• 12,000

• 20,000

• 96,000

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is true of carbon as it cycles in nature?

• Carbon dioxide is released during photosynthesis.

• Carbon compounds rarely exist in the gaseous state.

• Carbon sinks include forests and oceans.

• The carbon dioxide concentration in the atmosphere is reduced by cutting trees.

• Carbon is concentrated in igneous rocks.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of the following is an example of a carbon sink?

• Deposition of organic matter on the deep ocean floor

• Clearing of trees in the Amazon forest

• Combustion of fossil fuels in power plants

• Decomposition of food waste by bacteria

• Nutrient uptake by the roots of grasses in a suburban lawn

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is a process that indirectly removes carbon from Earth's atmosphere?

• Formation of carbonate deposits

• Outgassing by volcanoes

• Respiration by mammals

• Respiration by anaerobic bacteria

• Photodissociation by ultraviolet light

Which of the following is a characteristic of tropical rain forests?

• They rarely receive more than 100 centimeters of rain per year.

• Their soils typically have a high pH.

• Their soils are relatively poor in nutrients.

• They do not exhibit a great deal of species diversity.

• They generally occur in the rain shadows of mountain ranges.

Which environment is most likely to be characterized by dry scrub with frequent fires?

• A

• B

• C

• D

• E