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valentinak56 [21]
3 years ago
7

A farmer grows wheat near a river. He frequently uses

Biology
2 answers:
Alex3 years ago
4 0

Answer:

D. Level of nitrates in runoff water

Explanation:

Took the test too :)

MrRa [10]3 years ago
3 0

Answer: I think its B

Explanation: I hope this helps :)

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In a dependent living facility, the LPN/LVN screens a group of residents for risk factors to pneumonia. The LPN/LVN determines t
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<h2>Symptoms of pneumonia</h2>

Explanation:

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3 years ago
What is the third part of cell theory?
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Answer:

Explanation:

All cells come from pre-existing cells

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3 years ago
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Which of the following types of rocks are likely to disintegrate by weathering and erosion?
KATRIN_1 [288]
It's metamorphic rocks
4 0
3 years ago
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What sphere refers to water and ice?
omeli [17]
1) It should be the crysophere but since it is not I am not sure I am going to with hydrosphere
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5 0
3 years ago
The trp operon of E. coli controls expression of five enzymes that are involved in the biosynthesis of the amino acid tryptophan
DIA [1.3K]

Answer:

Tryptophan synthesis enzymes be made during low level of cellular tryptophan.

Explanation:

Tryptophan operon  contain 3 regulatory gene(trpR,trpP and trpO) and 5 structural genes(trpE,trpD,trpC,trpB and trpA) .trpR encodes the repressor protein that interacts with tryptophan present in the media and then the tryptophan repressor complex binds to the operator region to block the transcription of the structural genes of tryptophan operon.

   Here tryptophan acting as a corepresor.During mutation of trpR gene tryptophan biosynthesis enzymes will be synthesized only when the cellular tryptophan level remains very low.

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3 years ago
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