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olasank [31]
3 years ago
9

Many people use antimicrobial soap to kill bacteria on their hands. However, overuse may actually increase the risk of infection

. How could this occur?
Biology
1 answer:
ycow [4]3 years ago
7 0

Well observed. Let me explain how:

Antimicrobial products, such as soap and creams, contain antiseptic compounds, obtained from chemical, biochemical or natural sources.

All of them reduce the possibility of microorganisms surviving, by different means (pH imbalance, destruction of their membranes, induction of mutation, etc).

As you may have seen in the advertisements, these components only eliminate 99.99% of microorganisms. This means that there is always a small chance (0.01%) that some tolerant insulates could appear.

As a result of a continuous and excessive application of the same antiseptic over and over again, all microbes are eliminated less microbes those few tolerant. Being the tolerants, the only ones alive, all the offspring generated from them will carry the genes with tolerance to the next generation.

It is a clear example of genetic selection.    

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The moth species Biston betularia has two color morphs, or variants. One has a speckled white and black color, while the other i
Oksana_A [137]

Answer:

D. Changes in the environment changed each morph's ability to evade predation in different ways.

Explanation:

The moth species<em> Biston betularia</em> has two color morphs, or variants. One has a speckled white and black color, while the other is all black. Over the period of time, the distribution of moths dramatically changed between 1900 and 1950 in such a way that black morph became dominant but speckled morphs became very much declined in abundance. The reasons behind this change was heavy industrial pollution in UK between 1900 and 1950.

When the environment became very polluted, dark and blackish, the speckled moth had more chanced of getting eaten by predators thats why they declined in number  as compared to black morphs. On the other hand, backgrounds of grime and soot made black morphs less visible to the predators and they survived well. This is an excellent example of natural selection that only those specie better survive that have the ability to cope better with adverse environmental fluctuations.

Therefore, option D is best option.

Hope it help!

8 0
3 years ago
Need help I will give you 20 points plsss
dybincka [34]

Answer:

III3 will be "pp" lower case p

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As we know the trait is caused by dominant alleles. III3 is not affected so she will have two recessice alleles so 2 lower case p.

III2 is affected so the person will have one dominant allele P and one recessive. The dominant is from the father and the recessive is from the mother.

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How does the atomic mass of an atom differ from the atomic number?
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Answer:

1.

Explanation:

Atomic mass is protons+neutrons. Atomic number is just protons.

5 0
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A.... This is known as hydrogen bonding because the highly electronegative Oxygen in on molecule of water is attracted to the Hydrogen of another.
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