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svp [43]
3 years ago
9

Which of the following is an example of positive feedback? A) a person begins to sweat under the hot sun and moves into the shad

e B) a light rail system opens in a city and leads to decreased air pollution C) a fire starts in a forest, then spreads over thousands of acres  D) people begin to move out of an area following a natural disaster
Biology
2 answers:
podryga [215]3 years ago
7 0

Answer:

C) a fire starts in a forest, then spreads over thousands of acres

Explanation:

In positive feedback, an effect is amplified or enhanced by influencing itself. Usually the event occurs with a result. The result is such that it further amplifies the event resulting in increased production of the result. Hence a positive feedback loop is created where the result keeps on getting magnified.

Since a fire is started in an area in forest and then it spreads to acres as it encounters more and more dry foliage, it is an example of positive feedback. The result which is fire is magnified as more areas come under the fire.

Anna [14]3 years ago
4 0
Answer would be B. because it is decreasing the air pollution. 
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Katen [24]

Answer:

the answer is B.

Explanation:

4 0
4 years ago
You are examining the phylogenic relationship of a newly discovered plant species (Species 2). You amplify the RUBISCO barcode a
frozen [14]

Answer:

a. Inversion

b. Duplication

Explanation:

Inversion has the name suggest, has to do with a segment of DNA being reversed from end to end.

In this case here,

Inversion is taking place here.

species 1 ATGCAAATTTGGGCCCATGAATGGTTGCAA

species 2 ATGCAAAAATTTTGGTACGCCGAATGGTTGCAA

Therefore, the sequences in bold in species 1 are observed to be reversed end to end in species 2.

Deletion ❌❌

I am sure it's not feasible because deletion entails removal of a few sequences.

It can be seen that species 2 is longer than species 1, which gives another reason why deletion is not feasible too, as no sequences are seen to be deleted.

I believe duplication is feasible since AATT sequences are repeated once.

Our final answer,

inversion and duplication occur here.

4 0
3 years ago
How does the acidity of acid rain compare to the acidity of natural rainwater
jekas [21]

Answer:

The acidity level of water is measured by the pH scale. Pure water has a pH of 7, which is neutral. However, natural rainwater actually has a pH of 5.6 because it gets exposed to the gases in the atmosphere, making it a bit acidic. True acid rain will have a pH level measuring from 5.0-5.5.

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3 years ago
What is so special about nitrogen in the atmosphere
HACTEHA [7]

Answer:

Firstly, the partial pressure of nitrogen (78%) is crucial to breathing purposes. Without this pressure, the lungs will burst and animals cannot survive.

Secondly, nitrogen is required for the formation of amino acids (building blocks of proteins) and other organic compounds that are necessary for the survival of living organisms. Principally, in the atmosphere, nitrogen is present in the form of molecular nitrogen (N2). N2 is fixed by nitrogen-fixing bacteria that form nitrates and nitrites. These molecules are then used in biochemical processes to produce proteins (amino acids) and other organic compounds. In the absence of nitrogen, these processes could become seize of limited significantly thus affecting life overall.

Thirdly, nitrogen and its derivatives act as greenhouse gases that maintain the Earth's temperature within a range that supports life. Yes, the increased abundance of nitrous oxides is not good because of acid rain and other issues, however, still, the presence of nitrogen is important for life on this planet.

5 0
4 years ago
The human genome consist of about ____ chemical letters
Olegator [25]

I believe that it consists of about 3 billion letters/base pairs

5 0
4 years ago
Read 2 more answers
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