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Crank
3 years ago
5

Soil erosion is the wearing down of soil. This map provides data on the rate of soil erosion in the United States for a given ye

ar. What trend does the map show?
A.
Soil erosion rates are high across the United States.
B.
Soil erosion rates are low across the United States.
C.
Soil erosion rates are uniform across the United States.
D.
Soil erosion rates vary across the United States.
Biology
1 answer:
grandymaker [24]3 years ago
4 0

Answer:D

Explanation:

I got it right

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djyliett [7]

Answer:

B

Explanation:

4 0
3 years ago
Certain types of ________ have a relationship with certain plants where they help convert nitrogen into a usable form.
Viefleur [7K]

Answer:

Answer is C. Bacteria

Certain types of bacteria have a relationship with certain plants where they help convert nitrogen into a usable form.

Explanation:

Nitrogen is abundant in the atmosphere, but plants cannot use it because of the absence of a necessary enzyme, nitrogenase, which converts nitrogen into a usable form.  So they form a symbiotic relationship (mutually-beneficial arrangement) with nitrogen fixing soil bacteria (rhizobia) which perform biological nitrogen fixation. Biological nitrogen fixation is a process in which the symbiotic nitrogen-fixing bacteria coverts atmospheric nitrogen into ammonia and organic derivatives that plants can use to synthesize proteins.  This bacteria form nodules on the roots of plants like legumes in which nitrogen fixation takes place.

Both plants and bacteria benefit from this symbiotic relationship, as the plant obtains ammonia to synthesize proteins from nitrogen in the atmosphere while bacteria obtain carbon compounds from the plant produced through photosynthesis and a secure environment to grow. As the plant roots leave behind some of the usable form of nitrogen in the soil, this process also increase soil fertility.

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3 years ago
Where are the most experiments done. explain the benefits of this choice
Mazyrski [523]
<span><span><span>The experimental method is usually taken to be the most scientific of all methods, the 'method of choice'.</span><span> </span><span> </span><span>The main problem with all the non-experimental methods is lack of control over the situation.</span><span> </span><span>The experimental method is a means of trying to overcome this problem.</span><span> </span><span> </span><span>The experiment is sometimes described as the cornerstone of psychology</span>

 </span></span>
6 0
3 years ago
A(n) _______ is a pure substance that can't be broken down into simpler substances by chemical or physical means.
Rasek [7]
You don't have the options to choose from but I believe from past experience the answer to the question is element. 
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