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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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4 0
3 years ago
What muscle type is located in blood vessels?
Elanso [62]

Answer:

d.smooth muscle

Explanation:

Blood vessels contain only smooth muscle cells. These muscle cells reside within the tunica media along with elastic fibers and connective tissue

8 0
2 years ago
Read 2 more answers
Amino acid, globular structure C, H, O, N, amino acid sequence smallest to largest
nlexa [21]

 

<span>Given:

</span>

<span>H
C
N
O
amino acid</span>

Amino Acid sequence

Global Structure

 

<span>Find:

Order from smallest to largest = ?</span>

 

H, C, N, O, amino acid, amino acid sequence, globular structure.

<span>
These contains</span> amine and carboxyl functional groups, along with a side chain specific to each amino acid.

5 0
3 years ago
What is the next step in the scientific method, following data collection?
Yuri [45]
I believe collecting the data and the hypothesis
4 0
3 years ago
What characterizes depolarization, the first phase of the action potential? The membrane potential changes to a less negative (b
svp [43]

Answer:

Option (2).

Explanation:

The cell potential or membrane potential may be defined as the difference in the electric potential between inside and outside of the cell. The membrane potential of the cell changes during the propagation of action potential.

The resting membrane potential is -70mV. The influx of sodium ions causes the depolarization of the cell membrane. The cell potential changes from -70mV to + 30mV. The membrane potential becomes more positive during the depolarization phase.

Thus, the correct answer is option (2).

6 0
3 years ago
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