Sect 2.26 and 2.27 Carbon/Nitrogen Cycles

Front

What role do decomposers play in the nitrogen cycle?

Back

Decomposers break down decaying material, releasing nitrogen gas into the atmosphere.

Front

What is the last step in the carbon cycle?

Back

The last step is when heterotrophs die and decomposition occurs, allowing the cycle to restart.

Front

What is the first step in the carbon cycle?

Back

The first step is when CO2 diffuses into ocean water, forming bicarbonate ions.

Front

What is the equation for cellular respiration?

Back

The equation is glucose + oxygen → carbon dioxide + water.

Front

What is the process called when an organism eats something containing carbon?

Back

The process is called consumption.

Front

Define the carbon cycle.

Back

The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms.

Front

What is the significance of nitrogen-fixing bacteria?

Back

Nitrogen-fixing bacteria convert atmospheric nitrogen into a form that plants can use.

Front

Explain the process of photosynthesis in the carbon cycle.

Back

Photosynthesis is the process by which autotrophs convert carbon dioxide and sunlight into glucose and oxygen.

Front

What is the role of heterotrophs in the carbon cycle?

Back

Heterotrophs consume plants and animals, releasing carbon dioxide back into the atmosphere through respiration.

Front

What happens to carbon in dead organisms?

Back

Dead organisms are decomposed by bacteria and fungi, returning carbon to the soil and atmosphere.