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13 Cards in this Set
- Front
- Back
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Why can't plants use nitrogen in the atmosphere |
Because plants need NO3 and the nitrogen in the air is N2 |
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What is the function of nitrogen fixing bacteria in the nitrogen cycle |
The bacteria is able to change the nitrogen into a form that plants are able to use |
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Give two examples of plants (legumes) which have nitrogen fixing bacteria in nodules on their roots |
1. Soy beans 2. Lima beans 3. Clover |
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How do plants obtain nitrogen |
From the soil |
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What is the purpose of crop rotation on a farm |
Replaces the nitrogen ➡ by growing crops like soy beans |
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What are the two main ways water is returned from the earth to the atmosphere |
1. Evaporation 2. Transportation |
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Explain the meaning of the numbers 8-32-16 on a package of tomato fertilizer |
8 % nitrogen 32% phosphorus 16% potassium |
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What two essential classes of bio chemical compounds would plants be unable to reproduce without nitrogen and phosphorus |
1. Proteins 2. Nucleic acids |
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What is the difference between point and nonpoint pollution |
Point usually occurs in one specific location. Nonpoint is the biggest source of water pollution due to runoff; therefore it can occur in many different areas |
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Give at least two examples of each |
Point: Industry,leaking gasoline storage tank Nonpoint: fertilizer, motor oil |
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What is the largest single source of water quality problems in the United States |
Nonpoint pollution ➡ pesticides and fertilizers |
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Describe how Darwin's finches demonstrate the concept of a niche |
Different types of finches are able to feed off of different things in their habitat because of things like different beaks |
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What is the difference between a population and a community |
A population is only one species well community is made up of multiple species |
