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OLEGan [10]
3 years ago
9

How do mutations and natural selection lead to resistant populations of bacteria

Biology
1 answer:
Vadim26 [7]3 years ago
8 0

Answer:

Mutations are one way for bacteria to become resistant to antibiotics. Some spontaneous mutations (or genes that have been acquired from other bacteria through horizontal gene transfer) may make the bacterium resistant to an antibiotic (See: Resistance mechanisms for information about how bacteria resist antibiotic action). If we were to treat the bacterial population with that specific antibiotic, only the resistant bacteria will be able to multiply; the antibiotic selects for them. These bacteria can now increase in numbers and the end result is a population of mainly resistant bacteria.

Explanation:

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The extreme uninhibited behaviors often associated with a large consumption of alcohol are a result of increased activation of t
aalyn [17]

Answer:

Gamma-aminobutyric acid (GABA)

Explanation:

Gamma-aminobutyric acid (GABA) is the inhibitory neurotransmitter found in the central nervous system of mammals, especially humans, which is responsible for the regulation of communication between the brain cells, and also implicated in the slowing down of signals as neuronal impulses is reduced when it is activated. This is mostly responsible for the extreme uninhibited behaviors often associated with large alcohol consumption.

6 0
3 years ago
How is a scientific law different from a scientific theory?
Digiron [165]

Explanation:

Scientific laws and scientific theories are very similar.

They both discuss and observe phenomena that have already occurred and been evaluated.  

The main difference between the two is that law defines nature and what it does conditionally, and the reaction of nature when these conditions encounter.

To sum it up, law discusses the behavior of something that transpires in many annotations.  

A theory on the other hand discusses not the behavior, but the functions. The “why” factor so to speak.    

5 0
2 years ago
Oxidation of lactic acid into pyruvic acid involves (1) coenzymes donating hydrogen atoms to lactic acid.(2) a gain of potential
vazorg [7]

Answer:

The correct answer is option 3. removal of hydrogen atoms from lactic acid.

Explanation:

In anaerobic conditions, it ferments to generate lactic acid. It is two way or reversible process in which oxidation of lactic acid produces pyruvic acid and NADH.

This process involves the removal of hydrogen atoms from the lactic acid and produces NADH and H⁺ in the presence of lactate dehydrogenase enzyme and convert into pyruvic acid.

Thus, the correct answer is option 3. removal of the hydrogen atoms from lactic acid.

4 0
3 years ago
A children’s hospital in a major American city reported a dramatic increase in the number of rheumatic fever cases. Doctors were
Rasek [7]
As the main illness before you have a fever will normally be sore throat ( if you are heaty ) and flu ( if you caught a cold ) .
Hence the Doctors need to start monitoring the sore throats more carefully to prevent the increase of rheumatic fever cases .
Hope this helps !! :)
7 0
3 years ago
An organism which is sensitive to an antibiotic is grown in the lab in a pure culture on a medium with the antibiotic , if we se
soldi70 [24.7K]

Answer:

C. natural selection

B. Gram negative organisms

Explanation:

3 0
3 years ago
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