LS2.2 BIO1 Review

As humans burn fossil fuels for energy, the percent of carbon stored in fossils is reduced while the carbon in the atmosphere is increased. If green plants are also being removed, how might the carbon cycle and greenhouse effect be influenced?

• More carbon will be left in terrestrial ecosystems, decreasing the greenhouse effect globally.

• More carbon will be left in the atmosphere, increasing the greenhouse effect globally.

• More carbon will be left in the atmosphere, decreasing the greenhouse effect globally.

• More carbon will be left in terrestrial ecosystems, increasing the greenhouse effect globally.

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BIO1.LS2.2

The image shows part of the carbon cycle.

Which carbon pool will the trees use for producing sugars?

• atmosphere

• biosphere

• geosphere

• hydrosphere

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What is the role of organisms in the process labeled X?

• Organisms such as plants convert carbon dioxide from the air into simple sugars and give off oxygen.

• Decomposers break down carbon compounds releasing oxygen into the air.

• Denitrifying bacteria break down nitrogen compounds releasing oxygen into the atmosphere.

• Organisms such as animals use carbon dioxide from the air to release energy from food and give off oxygen.

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Which explanation best describes the importance of the carbon cycle?

• It supplies the amino acids which are the building blocks of proteins.

• It is essential in the production and metabolism of sugars for energy.

• It is necessary for the formation of phosphates which form DNA and RNA.

• It is used in forming water which is necessary for organisms.

  It is used in forming water which is necessary for organisms.

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How does carbon dioxide in the atmosphere become incorporated as carbon in living things?

• through photosynthesis

• through respiration

• through deposition

• through decomposition

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How has the world's continuously growing human population negatively impacted the environment?

• hybrid vehicles and public transportation

• environmental laws and recycling

• greenhouse effect and deforestation

• family planning and vegetarian diets

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NGSS.MS-ESS3-4

Use the diagram to answer the question.

What do the labeled numbers in the diagram represent?

1: ​ (a)  

2: ​ (b)  

• photosynthesis
• cellular respiration
• transpiration

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The greenhouse effect is a natural process whereby certain gases in the atmosphere trap heat that would otherwise be reradiated back into space, helping to warm Earth.

What are some of the gases represented by the letter X in this figure?

• argon and helium

• carbon dioxide and methane

• chlorofluorocarbons and ozone

• nitrogen and oxygen

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The diagram shows a process that occurs in all plants.

Which statement accurately explains one of the roles this process has in maintaining the quality of the atmosphere?

• The nitrogen released through this process is a major component of the greenhouse gases which trap heat and maintain the Earth’s temperature range.

• The carbon dioxide released through this process reacts with other greenhouse gases in the atmosphere, reducing the greenhouse effect.

• The oxygen produced through this process is partially responsible for the ozone layer which protects the Earth from much of the Sun’s ultraviolet radiation.

• The water vapor given off during this process binds with atmospheric nitrogen, resulting in an increased amount of ultraviolet radiation passing through the ozone layer.

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The diagram illustrates a cellular process that occurs in autotrophic organisms.

Which statement accurately identifies the process and the role it plays in the environment?

• The process is cellular respiration, and it converts radiant energy into inorganic compounds which are consumed by herbivores.

• The process is cellular respiration, and it is the primary source of radiant energy in the environment.

• The process is photosynthesis, and it is important in the recycling of atmospheric carbon dioxide.

• The process is photosynthesis, and it uses organic compounds and water to produce energy which is released as heat.

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