Drug-resistant tuberculosis is a major health issue in many countries. Treatment for these resistant forms of bacteria is longer and requires more expensive antibiotics. Scientists attribute this to natural selection. Under these circumstances, what does natural selection mean?
A. The tuberculosis genes mutated to avoid being killed by the antiblotic
B. Tuberculosis bacteria discovered a way to avoid these particular antibilotics.
C. An environment was created in which the tuberculosis bacterium carrying the antibiotic-resistant genes could reproduce.
D. The antibiotic changed the DNA of the tuberculosis bacterium.

Answers

Answer 1
C one because it makes the most sense

Related Questions

How does water organize molecules? (hydrophobic vs hydrophilic)

Answers

Answer:

When placed in water, hydrophobic molecules tend to form a ball or cluster. The hydrophilic regions of the phospholipids tend to form hydrogen bonds with water and other polar molecules on both the exterior and interior of the cell.

Which of the following statements below are TRUE about Keystone Species? Pick all that are correct

1.If keystone species are removed, it can destroy the balance of the ecosystem
2.There can be more than one keystone species within an ecosystem.
3.Keystone species have very little importance to the balance of an ecosystem.

4.One example of keystone species in the ecosystems stem case food web are
bees because they pollinate the plants.

Answers

1 is correct. 2 is also correct. 4 is correct as well.

For characteristic features of key stone species, option 1, 2 and 4 are correct.

What are keystone species ?

The presence of the species whether plant or animal in an ecosystem largely influence on a given environment called as keystone species.

It affect the habitat of all living organisms, so that the ecosystem would become functionless in absence of keystone species.

On of the best example is prey-predator relationship.

Some important environmental influence of keystone species are, it affect organism's physical appearance.

There is an impact of parasites, diseases on prey and host population, act as a mutualist, absence of key stone species leads to domino effect.

For example in absence of carnivore, number of herbivores increased, hence the environment cannot support the infinite number of herbivore population.

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what's is an ribosomes

Answers

Ribosomes are a minute particle consisting of RNA and associated proteins found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins.

What is the process of nitrification?

Bacteria converts ammonia into nitrites and nitrates that plants can use.
Fungi convert nitrogen in dead plants into ammonium, which converts proteins into ammonia.
Nitrogen is converted into a useable form through lightning fixation.
Plant enzymes reduce nitrogen compounds into amino acids.

Answers

Answer:

Bacteria converts ammonia into nitrites and nitrates that plants can use.

Nitrification is a microbial process by which reduced nitrogen compounds (primarily ammonia) are sequentially oxidized to nitrite and nitrate. Ammonia is present in drinking water through either naturally-occurring processes or through ammonia addition during secondary disinfection to form chloramines.

                                        Thank You

The two main classes of hormones are: amine/peptide hormones and steroid hormones. nucleic acid hormones and lipid hormones. polysaccharide hormones and protein hormones. steroid hormones and lipid hormones. ls7c

Answers

Answer:

There are two major classes of hormones 1. Proteins, Peptides, and modified amino acids 2. Steroids. In general, steroids are sex hormones related to sexual maturation and fertility.

Explanation:

hope this helps

can someone explain how to do this i'm confused.

Answers

It is paper and a table

¿De que manera las empresas han dañado nuestra biodiversidad?

Answers

they are producing too much and causing damage to the air quality

Behind your house, there's a gorgeous pond filled with frogs. You notice that the frogs behind Mr. Archer's house often have three legs. You start wondering if the fertilizer that Mr. Archer uses for his lawn is causing the deformities in the frogs. You collect 10 frogs and put the special fertilizer in their container (Group A). You put another 10 frogs and place them in a different container with just water (Group B). A week later, 7 out of 10 of the frogs in group A grew only three legs. The frogs in group B grew four legs.



What is the independent variable?

Answers

The substance in the containers(special fertilizer and water)

que es el eslabón perdido​

Answers

Answer:

bonjour

please try and express what you asking in English

write any two important of measurement​

answer fast

Answers

It’s importance in science and chemical industry

Alligators living in a pond is a example of

an ecosystem because

Answers

Answer: Alligators living in a pond is an example of natural habitats

PLEASE HELP WILL GIVE BRAINLIEST Explain the process in which root cells get their energy, list all the organelles involved in the process. NO COPY AND PASTE PLEASE AND NO BAD ANSWERS.

Answers

Answer:

Sugars are particularly important fuel molecules, and they are oxidized in small steps to carbon dioxide and water.In this section we trace the major steps in the breakdown, or catabolism, of sugars and show how they produce ATP, NADH, and other activated carrier molecules in animal cells. We concentrate on glucose breakdown, since it dominates energy production in most animal cells. A very similar pathway also operates in plants, fungi, and many bacteria. Other molecules, such as fatty acids and proteins, can also serve as energy sources when they are funneled through appropriate enzymatic pathways.

Explanation:

Hope this helps please let me know if I’m correct

Which of the following best explains why Mars' and Venus' surface temperatures vary, despite both planets having atmospheres that contain mostly carbon dioxide?(1 point)

Venus has a surface of high mountains which absorb heat.
Mars has a surface of red rocks and sand which reflect heat.
Venus has a thick atmosphere which blocks heat from the surface.
Mars has a thin atmosphere that cannot hold much heat.

Answers

Mars and Venus are the planets of the solar system and vary in their temperatures. Mars has a thin atmosphere that cannot much amount of heat. Thus, option D is correct.

What is the atmosphere of Mars?

Mars has been the fourth planet of the solar system that is also called the red planet due to its red appearance. It has more amount of carbon dioxide than oxygen gas. It comprises various gases and has a thin atmosphere.

The thin atmosphere of Mars unlike Venus cannot hold the heat and transmits it back to space. Venus has a thick atmosphere that traps heat and results in an increased surface temperature. The atmospheric particle of Mars cannot retain heat and hence vary in temperature.

Therefore, option D. Mars has a lower temperature than Venus due to its thin atmosphere.

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Answer:

Mars has a thin atmosphere that cannot hold much heat.

Explanation:

bc science

I need help putting these in proper order plz ASAP!!!

Answers

Answer:

identify, research, make a hypothesis, test hypothesis, observe and record, arrive at a conclusion

Explanation:

1. List five units of measure in common use

Answers

Answer:  metre, kilogram, second, ampere, kelvin,

Explanation:

To make a guess based on what you know or think

Answers

Explanation:

An inference is an educated guess. We learn about some things by experiencing them first-hand, but we gain other knowledge by inference — the process of inferring things based on what is already known.

can anyone help me fill in the blank lol ?​

Answers

Answer:

I can't really see it.

Explanation:

I will give brainliest

Explain, using the term water potential, why Rhabdostyla needs to remove excess water​

Answers

Answer:

They are necessary because, in fresh water, the concentration of solutes inside a cell is greater than that outside the cell, so the cell constantly absorbs water through osmosis

Explanation:

plz mark me brainliest

Which type of rock is often stratified?

Answers

Explanation:

Sedimentary rocks.

Hope it helps.

Which statement is true?
A) It is possible for an algae to have one mitochondrion per cell.
B) All animal cells have the same number of mitochondria.
C) Eggs of a sea urchin contain up to 150,000 mitochondria.
D) Liver cells of a rat contain 5,000,000 mitochondria.
E) A and C
OF) C and D

Answers

The answer is d I did it

Our solar system is just a small part of the Milky Way galaxy, which is just a tiny part of the universe.

true or false

why?​

Answers

Answer:

True

Explanation:

Our solar system is just a small part of the milky way galaxy. Our galaxy is a huge collection of gas, dust, and billions of stars and their solar systems and there are many galaxies in the universe. This is because of the big bang.

When it happened, many galaxies were formed and then in these galaxies many solar systems developed.

Hope this helps.

I need one paragraph about Cell Energy​

Answers

Cell energy is since work so science people will
know

hi i am bob i am a gold fish

Answers

Answer:

hi bob are you a gold fish so why did you use phone because you stay at in water

Explanation:

goodluck bob and becarful the cat

Answer:

I’m a duck

Explanation:

How does hydrogen peroxide get into cells?

Answers

Answer:

when a cell creates hydrogen peroxide, it stores it inside the cell's specialized organelles, called peroxisomes, which contain hydrogen peroxide-busting catalase.

Explanation:

Hydrogen peroxide gets into the cell with the help of an enzyme called peroxide dismutase, which significantly catalyzes the process of dismutation of superoxide radicals in order to synthesize H2O2.

What is Hydrogen peroxide?

Hydrogen peroxide may be defined as a liquid chemical that typically contains hydrogen and oxygen and is generally utilized for bleaching and as an antiseptic.

Hydrogen peroxide is consistently produced in the cell and then stored in the organelle known as the peroxisome. The cells then eliminate the excess amount of hydrogen peroxide (H2O2) with the action of an enzyme called catalase. And gest dissociates into the water (H2O) and molecular oxygen (O2).

Therefore, the process of production and digestion of hydrogen peroxide in the cell is well described above.

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Explain briefly conservation of cultural heritages and development of human resource as
principles of sustainable development.​

Answers

Answer:

The key principle of sustainable development underlying all others is the integration of environmental, social, and economic concerns into all aspects of decision making. All other principles in the SD framework have integrated decision making at their core

Explanation:

Introducing the four pillars of sustainability; Human, Social, Economic, and Environmental.

describe the chemical test for glucose and maltose?​

Answers

the test is called Benedict’s Reagent

it’s used to test for the presence of all monosaccharides, and generally also reducing sugars

Pump jacks use upward force and pressure to slowly move oil up a drill shaft. Which statement best describes an environmental consequence of this process?

O Soil is removed by the force and pressure of the drilling process.

High salinity of wastewater reduces soil fertility and growth of vegetation.

Wastewater is contaminated with oil and becomes sludge in landfills.

O Heavy metals are released into surrounding soil, poisoning local vegetation.

Answers

The main consequence of this process is that the soil is removed by the force and pressure of the drilling.

For the extraction of oil from the land, the vegetation is removed that destroys the habitat of many organisms as well as the degradation of soil occurs due to the force and pressure of the drilling machines.

In water, the aquatic organisms including plants and animals are adversely affected due to this process of extraction so we can learn that there are many consequences of extracting oil from the soil to the surrounding environment..

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Answer:

Wastewater is contaminated with oil and becomes sludge in landfills.

Explanation:

An Allele is best described as:
A. A version of a gene
B. A recessive gene
C. A dominant phenotype
D. A test cross

Answers

An allele is best described as a version of a gene. Option A is correct answer.

Genes are segments of DNA that contain instructions for the development and functioning of living organisms. Each gene can exist in different forms, called alleles.

For example, let's consider a gene that determines eye color. This gene can have different alleles, such as brown allele, blue allele, and green allele. Each allele represents a different version or variant of the gene.

The different alleles of a gene can lead to variations in traits or characteristics. In the case of eye color, individuals with two copies of the brown allele will have brown eyes, individuals with two copies of the blue allele will have blue eyes, and individuals with one copy of the brown allele and one copy of the blue allele will have a mix of brown and blue eyes.

So, the correct answer is A. A version of a gene. An allele represents different versions of a gene that can result in variations in traits or characteristics.

Option A is correct answer

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Sheila bought a hamster in a small pet shop. To feed it properly, she
needs to know its weight. If the hamster has a mass of 190.0 g, what is
its weight?

Answers

Answer:

0.19 kilogram

Explanation:

may this answer is helpful for you

The nuclear lamina is an array of filaments on the inner side of the nuclear membrane. If a method were found that could cause the lamina to fall into disarray, what would you most likely expect to be the immediate consequence

Answers

Answer:

The nuclear lamina is an array of filaments on the inner side of the nuclear ... If a method were found that could cause the lamina to fall into disarray, ...

Explanation:

1. The nuclear lamina is a network inside the nucleus which maintain the shape of nucleus.

2. It is composed of intermediate filaments and many proteins.  

3. It providing mechanical support to the nucleus and play many other rolls in the cell.

4. In a cell  if the nuclear lamina fall into disarray, the nucleus is misshapen and all these processes run awry. Such cells in which nuclear lamina is broken, they tend to become senescent in response to internal dysfunction, and cause damage to surrounding tissue.

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