1. Which of the following is true regarding the carbon cycle and food webs?
A. Food webs and the carbon cycle are closely related because all living organisms are composed of carbon.
B. Food webs and the carbon cycle are closely related because carbon enters the bodies of organisms through respiration.
C. Food webs and the carbon cycle are unrelated because the carbon cycle only relates to inorganic components of the food web.
D. Food webs and the carbon cycle are unrelated because carbon is only processed during the water cycle.
2. The organisms that play a vital role in changing nitrogen back into ammonium so it can reenter the food web are
A. producers
B. consumers
C. predators
D. decomposers
3. Which of the following describes a role of producers in the cycling of matter in an ecosystem?
A. Producers release carbon dioxide as a result of photosynthesis.
B. Producers release oxygen as a result of photosynthesis.
C. Producers release nitrogen as a result of photosynthesis.
D. Producers release phosphorus as a result of photosynthesis.
4. What are producers able to do with nitrogen in order to make it useful in a food web?
A. Producers can use nitrogen to build proteins and other complex compounds.
B. Producers can fix nitrogen in a useful form while it remains within the soil.
C. Producers can process nitrogen as they consume other living organisms for energy.
D. Producers can return simple nitrogen compounds to the soil during photosynthesis.
5. The element that primarily leaves the bodies of organisms through respiration and is returned to the soil when organisms die and decompose is known as
A. hydrogen
B. carbon
C. nitrogen
D. phosphorus
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Here are my answers:
A
D
A
D
D
I know these are probably wrong but could someone please help me!?
6 answers
2.D
3.B
4.A
5.B