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Terms in this set (15)
Why are bacteria the most important part of the notrogen cycle?
The fix nitrogen into free nitrogen which is a usable form. They also bring nitrogen back into the system by decomposing dead organisms.
How do animals obtain usable nitrogen?
Animals eat plants or other animals that eat plants.
What are three ways in which nitrogen can be fixated so plants can use it to grow?
Lightening, bacteria in soil, and bacteria in roots (legumes)
What is the problem if too much nitrogen enters an aquatic ecosystem?
A lot of algae will start to grow and when they die, the decomposes will use oxygen to decompose the algae and it was eventually use up all of the oxygen in that ecosystem.
Why is nitrogen so important to living things?
All living things need nitrogen to build proteins and other important body chemicals.
Why is free nitrogen a problem for many organisms?
Many organisms can't get free nitrogen.
What form must the nitrogen be in?
What organisms are responsible for producing nitrogen compounds?
Certain types of bacteria.
What is the process called where bacteria produces nitrogen compounds?
Where can nitrogen fixing bacteria be found?
What are some plants that are nitrogen fixers?
Clovers, peas, beans, alfalfa, and peanuts.
What are decomposers?
Organisms that breakdown waste or dead animals.
What part do decomposers play in the nitrogen cycle?
They change complex nitrogen into free nitrogen and return it to the soil.
Where does free nitrogen produced by bacteria eventually go?
To the atmosphere or the soil.
What are the steps in the nitrogen cycle?
Free nitrogen is fixed by bacteria or lightning. Plants take in nitrogen. The animals eat the plants. Bacteria breaks down the waste/dead organisms and release nitrogen back into the system.
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