For a long time, penicillin was given to people to kill the bacteria which caused ear infections. Lately, some ear infections are not cured by penicillin. Which is the best explanation for this?

Answers

Answer 1

Answer:

Some bacteria have mutated and are not killed by the penicillin

Explanation:


Related Questions

Green building involves architecture that consists completely of organic materials.


Please select the best answer from the choices provided

Answers

Green building involves architecture that consists completely of organic materials. FALSE. Green building is the practice of creating structures and using processes that are environmentally responsible and resource-efficient throughout a building’s life-cycle

what is the most widely used method of gene editing?

Answers

CRISPR/Cas9 is the most widely used genome editor.

Genome editing, also called gene editing, is an area of research seeking to modify genes of living organisms to improve our understanding of gene function and develop ways to use it to treat genetic or acquired diseases.

In the Galapagos Island finches, the variation in the beak shape correspond to which finch characteristic?

Answers

Answer:

Their diet

Explanation:

Over time, all of the finches adapted to their food source. This caused the evolution of their beaks to begin.

Name two places where carbon is stored.

Answers

Answer:

rocks and sediments

Explanation:

On Earth, most carbon is stored in rocks and sediments, while the rest is located in the ocean, atmosphere, and in living organisms.

Which of the following statements about the stomach is true?
O
Pepsins are the digestive enzymes that enable the stomach to break
down proteins.
O
Amylase is the pasty substance that's created when stomach enzymes
and food mix together.
O
The stomach receives chyme from the esophagus, which it turns into
bolus before passing it on to the small intestine.
The stomach processes nutrients, absorbs water and removes any
toxins created during chemical digestion.

Answers

Pepsin’s are the digestive enzymes that the stomach break

Describe how physical and chemical changes affect mass

Answers

Answer:

Explanation:

Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

Which is one quality of the entire open-ocean zone?

Answers

Answer: few nutrients, low pressure, ample sunlight,varying salinity

Question 9 of 38
Which of the following is a benefit of commercial agriculture?
A. The use of diesel farm machinery
B. Efficient milk production
O C. A reduction in biodiversity
OD. Water conservation
SUBMIT

Answers

Efficient milk production is a benefit of commercial agriculture. thus option B is correct.

What is commercial farming?

Commercial farming is a practice where crops and livestock are cultivated with the intention of selling them as finished goods to gain money. A significant amount of capital investment is required to grow commercial farming.

When making commercial dairy, the milk is placed into MASSIVE industrial centrifuges, where it is divided into different components like lipids and proteins. To create whole, low-fat, and skim milk, the components are then once again mixed. It is pasteurized, put in a bottle, and transported.

Learn more about commercial farming here:

https://brainly.com/question/17392167

#SPJ1

Please Answer Correctly As This Is For My Project.

1. What are the unique characteristics of the macromolecule subunit and macromolecule you explored?

2. Describe how the subunit you modelled chemically combines with other subunits to form a macromolecule.

3. What are the functions of the macromolecule you explored?

4. Summarize the relationship between the structure of your subunit and the function of the macromolecule it forms.

Answers

Answer:

1. Macromolecules are typically BIG molecules, and they truly are the building blocks of cells. Macromolecules are generally built by combining many single units, or monomers, into larger units, called polymers.

2.polymers which are long chains of subunits called monomers.

3.Gigantic molecules, called macromolecules, populate a cell and provide it with important functions for life. For example, macromolecules provide structural support, a source of stored fuel, the ability to store and retrieve genetic information, and the ability to speed biochemical reactions.

4.Polymers are macromolecules, but not all macromolecules are polymers. The main difference between a polymer and a macromolecule is that polymers contain repeating units that represent monomers whereas not all macromolecules have a monomer in their structure

Explanation:

A population of sixteen emu grew to thirty-nine in one year. After two years, the population had grown to forty-eight. The maximum number of emu that the environment can support is approximately sixty due to limited resources such as food and water.

Answers

Answer:

The largest number of emu that the environment can support is about sixty.

Explanation:

For this assignment, you will conduct research to find the actual sizes of the Sun and the planets. Then, you will use an online solar system model calculator to determine the scaled sizes of these celestial bodies. Finally, you will use this information to create a scale model of the solar system.

Answers

The assignment is not found here but the biggest planet in the solar system is Jupiter whereas the Earth is the fifth largest planet.

What is the solar system?

The solar system is a group of planets and other celestial bodies that orbit around our star, the Sun.

The solar system has a medium-size compared with other stellar systems and gaseous planets (e.j., Jupiter) are the largest than rocky planets (e.g., Earth).

In conclusion, the assignment is not found here but the biggest planet in the solar system is Jupiter whereas the Earth is the fifth largest planet.

Learn more about the solar system here:

https://brainly.com/question/15837114

#SPJ1

How come the human body does not absorb water completely? In other words; why is it that even though the water could be the best possible in terms of purity, the kidneys still need to filter it? What is there to filter if the water is completely clean and pure? Shouldn't all that water simply be absorbed by all the cells in our organism?​

Answers

Answer:

Because it's job of kidney to filter out everything passing through it.

Explanation:

logical answer:

it's the job of kidney to filter every thing which oasses through it. How can your kidney know that the water you had drink is pure . Does your kidney have brain ?? likewise nothing is 100% perfect in this world , the water you drink is also not 100% pure.

Knowledgeable Answer:

Human body doesn't absorb all water completely because some water is filtered from our kidney to maintain overall fluid balance,to

regulate and filter minerals from blood, to

remove waste material and toxic substances. and it's the function of kidney to filter everything hich passe through it and if it stop filtering then human body doesn't work properly.

HOPE IT HELP ...... BUT VERY LONG SNSWER HAHAHA

What is the best way to prevent the growth of bacteria on food preparation surfaces?

Answers

The best way to prevent the growth of bacteria on food preparation surfaces is sterilization. Details about sterilization can be found below.

What is sterilization?

Sterilization is the process of treating something to kill or inactivate microorganisms.

Sterilization can also be done to prevent the reproduction of microbial population.

It is a known fact that microbes are responsible for food spoilage, hence, to prevent this, it is important to kill or get rid of them.

Therefore, the best way to prevent the growth of bacteria on food preparation surfaces is sterilization.

Learn more about sterilization at: https://brainly.com/question/14290729

#SPJ1

______________If blood temperature rises too high, specialized neurons in
the hypothalamus of the brain sense the change. These neurons signal other nerve centers, which in
turn send signals to the blood vessels of the skin. As these blood vessels dilate, more blood flows
close to the body surface and excess heat radiates from the body. CAN SOMEONE PLEASE HELP

Answers

Answer:

1. Negative Feedback

2. Negative Feenback

3. Positive Feedback

HELP ! ILL MARK BRAINLIEST !!!

Answers

Answer:

destruction of natural habitats

Explanation:

First let's define our main terms or each answer choice.

1)Decreased deforestation - Deforestation is the action of clearing mass amounts of trees for human use such as farms, buildings, houses etc. So this answer is basically saying that as the human population increased the amount of trees that get destroyed will decrease.

2)Destruction of natural habitats - Natural habitats is simply the natural home of animals. So this answer is saying as the human population increases the more number of animals natural homes will be destroyed

3)Unchanged climate - Climate is basically the long term weather of an area. So this answer choice is saying that as the human population increases the climate will remain unchanged.

4)Increased biodiversity - Biodiversity is the different kind of life on earth usually regarding a specific habitat or ecosystem. So this answer choice is essentially saying that as the human population increases the types of life on earth increases.

What comes with increased human population?

As the human population increases the need for food, houses, water, jobs etc increases as well. Keep that in mind while looking at the answer choices.

Determining the answer

Why the answer isn't A

Rereading 1) and then what comes with increased human population we can most definitely rule out A. As human population increases the need for houses and jobs increases. In order to have a good enough supply of wood and land for these houses and buildings for these jobs, deforestation must occur. So as human population increases deforestation would increase as well.

Why the answer is B.

Rereading 2) and then looking at what comes with increased human population we can maybe say that B is correct. Looking back at the previous section we've already identified that mass deforestation must occur to satisfy the needs for wood and land for houses and jobs for the increased population. As we know many animals probably live in these forests and inside of the trees so many of these animals homes would be destroyed resulting in the destruction of natural habitats ( animals homes )

Why the answer isn't C

After rereading section 3) and what comes with increased human population we can rule out C. If an increase in human population results in deforestation the amount of CO2 released into the air increases as well. If you didn't know trees absorb CO2 which is bad for the atmosphere. Once destroyed the trees release the CO2 that they have absorbed. CO2 and other green house gases create holes in our atmosphere leading to a change in climate as the suns radiation travels through these little holes. This results in a change in temperature, increased natural disasters and the melting of ice on the poles which also leads to increased temperatures. Deforestation isn't the only cause of this ( gasoline from cars, burning of fossil fuels , pesticides and many other human caused actions result in this ). These are all human caused things so if the human population increases the amount of green house gase emissions would likely increase as well meaning the climate would no remain unchanged.

Why the answer isn't D

After reading section 4) as well as the section titled "why the answer is B" we can rule out D. In order for an increase in biodiversity to occur, natural habitats must be preserved ( remain untouched ) if deforestation occurs then natural habitats will be destroyed and biodiversity will never increase as many animals may not be able to find another sustainable habitat. Not only that but the question asks about a negative affect and biodiversity is a good thing.

Describe two ways of measuring biodiversity.

Answers

Answer:

canopy fogging and quadrat sampling

Explanation:

Scientists use several methods to measure biodiversity. These include canopy fogging, quadrat sampling, transect sampling, and netting. The method used depends on the types of organisms ecologists are counting and on the habitat.

the ozone layer is a/an
A- layer of soil where oxygen is particularly abundant
B- atmospheric process like climate change
C- layer of the atmosphere, rich in ozone gas, that protects the Earth's inhabitants from the harmful effects of UV radiation
D- layer of gas at the bottom of the ocean that bubbles off when disturbed

Answers

Answer:

the answer is c

Explanation:

pretty simple

The ozone layer is best described as a layer of the atmosphere, rich in ozone gas, that protects the Earth's inhabitants from the harmful effects of UV radiation. The correct option is C.

The ozone layer is found in the stratosphere, a region of the Earth's atmosphere located approximately 10 to 50 kilometers above the Earth's surface.

It contains a higher concentration of ozone (O3) molecules compared to other parts of the atmosphere.

The ozone molecules in this layer absorb a significant portion of the incoming UV radiation from the Sun, thereby shielding living organisms on Earth from its harmful effects.

UV radiation can be harmful to human health and ecosystems.

Overexposure to UV radiation can cause sunburn, skin cancer, cataracts, and immune system suppression in humans.

Thus, the correct option is C.

To know more about the Ozone layer, click here:

https://brainly.com/question/13253026

#SPJ2

what is vegetative propagation?? explain in detail ​

Answers

Plant development from vegetative components such as stems, roots, and leaves is known as vegetative propagation.

Plants, unlike most animals, may be propagated by extracting a portion of tissue (usually a leaf, stem, or root) from a parent plant and cultivating it in perfect conditions. Remove a little growing tip off an apple tree limb and plant it in moist soil in a warm, semi-humid region, for example. It will become a new plant when the branch grows roots.

Reasons for vegetative propagation:

Preserving characteristics Vegetatively propagated plants are clones of their parents. They share the exact same DNA. As a consequence, they will grow in the same pattern, blossom in the same color, taste the same, be disease resistant, and so on. In reality, if you enjoy an apple tree, the only method to increase its number is to reproduce it vegetatively*. Seedlings will be connected to their parents but will most likely have numerous different characteristics.Ease Rooting clippings from a parent plant is simple and inexpensive. Collecting seeds on contract might be time intensive.

The downside:

Lack of diversity An orchard of clones, as one might expect, is far more sensitive to diseases and stress; if one plant becomes ill, they all get ill. When plants reproduce through seeds, their DNA is mixed, resulting in new variants. Genetic diversity ensures that at least one plant will survive and continue to reproduce.

VEGETATIVE PROPAGATION -:

PROPAGATION IS THE MODE OF REPRODUCTION IN WHICH PRODUCTION OF NEW PLAN TAKE PLACE FROM THE VEGETATIVE PART OF ROOTS STEM LEAVES BULBILIS OF PLANT .

_____________________

NATURAL METHODS -:

1 PROPAGATION BY ROOTS

plant like carrot sweet potato daheliya can grow into new plant from their root cutting root of these plant are swell in and have food stored in them there root cutting hai but which when placed in moist soil give rise to new plant.

_________________________________

2 PROPAGATION BY LEAVES

plant like sugarcane money plant banana strawberry patted to its rapid is from their stem cutting potato and underground stem has small bird called eyes on it surface these on coming in contact with moist soil germinate give rise to new plant.

ginger and underground stem card reserve also reproduce in the same method underground stem of onion tulip called bulbs they have birds in their body which rise to new plant

_____________________________

PROPAGATION BY LEAVES

the leaps love plant like begonia produce Bird on their margins on touching moist soil the birds grow into new plant .

__________________________________

PROPAGATION BY BULBILIS

bulbils are fleshy root on auxils

__________

ARTIFICIAL PROPAGATION

1 STEM CUTTING

a small piece of this stem of a plant having at least one known is called stem cutting and stem cutting is placed in moist soil under suitable condition it developed new leaves complete plant

2 layering

laying the method of propagation stem of plant bent down sarpali into ground so that covered with soil after removing a ring of work from the stem

3 GRAFTING

new varieties of plant are developed by this method root portion call the stock is taken from one plant and portion that has many butcars ki and is taken from another plant the end of stock is can obliquely cut tired together

ADVANTAGESIT IS THE FASTEST METHOD OF INCREASING THE NUMBER OF PLANT

PLANT MATURE AND BEAR FRUIT FASTER

THE NEW PLANT ARE AN EXACT COPY OF PARENT PLANT SO IT DESIRED QUALITY OF PARENT PLANT CAN BE REPLICATED IN NEW PLANT.

DISADVANTAGE

PLANT LOSS THERE VIBHOUR WITH TIME WAS THERE IS NO GENETIC VARIATION

IT OF THE RESULT IN OVERCRODING IS SO MANY PLANT PRODUCE

Can someone help me with this please? Match the following organelle to its function.

Answers

Answer:

lysosomes

endoplasmic reticulum

vacuoles

mitochondria

cytoplasm

golgi apparatus

ribosomes

chloroplast

Explanation:

in order of the functions listed

You have been working in the garage, adding a coat of varnish to a piece of furniture. You wipe your hands on a shop rag. Because Varnish, is flammable, which waste category does the rag now belong to?

A: Ignitable
B: Corrosive
C: Reactive
D: Toxic

Answers

Answer:

A: Ignitable

Explanation:

Remember, ignite means ability to basically catch fire. Since varnish is flammable (can catch fire), it must go in ignitable waste

What element is missing from the cellulose molecule which is needed to make collagen?

Answers

I’m not sure if this is exactly what ur asking, but vitamin c, zinc, and copper are needed

The missing element that is needed to make collagen in cellulose is  vitamin C, zinc, copper and manganese to make the triple helix.

What is collagen?

Glycine, proline, and hydroxyproline are the three amino acids that make up collagen.

Cellulose synthesis is gaining popularity not only because cellulose is a major component of plant cell walls, but also because it has the potential to become a major resource for renewable biofuels.

The cellulose structure is made up of long polymer chains of glucose units connected by a beta acetal linkage.

The image on the left depicts a very small section of a cellulose chain. The monomer units are all beta-D-glucose.

Amino acids are the building blocks of proteins. These amino acids form protein fibrils with a triple helix structure.

To form the triple helix, your body also requires adequate amounts of vitamin C, zinc, copper, and manganese.

Thus, the missing elements are vitamin C, zinc, copper and manganese.

For more details regarding collagen, visit:

https://brainly.com/question/3105041

#SPJ2

transportation of seedling is not done for
1 rice
2 maize
3 onion
4 brinjal ​

Answers

Answer:

answer number 3 onion is correct answer

Why are models often used in science

Answers

Answer:

Models use familiar objects to represent unfamiliar things. Models can help you visualize, or picture in your mind, something that is difficult to see or understand. Models use familiar objects to represent unfamiliar things.

Explanation:

Models can help you visualize, or picture in your mind, something that is difficult to see or understand. Models can help scientists communicate their ideas, understand processes, and make predictions

PLEASE HELP!!!

Part D
Question
Next, you’ll build a simulation based on what you think will happen because of natural selection.

Here are two considerations:

Some individuals with harmful characteristics can still successfully reproduce, but they have an overall lower chance of doing so compared to organisms with neutral or beneficial traits.
Natural selection may affect distribution of traits. It’s possible that harmful traits could eventually disappear from the gene pool.
Don’t worry about precise population numbers. Based on your understanding of natural selection, you’ll be modeling only one scientifically plausible trend that can occur. There are several correct variations of this diagram. You’ll explain the justification for your choices in part E.

Assume that these plants have a life expectancy of about one year, but the rate of reproduction keeps their population consistently around 2,500 organisms. Using the same elements you used in part C, draw simulations for year 5 and year 10. Clearly label each simulation.

Answers

According to natural selection process, the trend that will occur is that the number of organisms with harmful characteristics will decrease  while organisms with neutral or beneficial traits will increase in the plant population

What is natural selection?

Natural selection is the process by which organisms with favorable features and characteristics that enable them to adapt to their environment survive while those with unfavorable traits die off.

In a changing environment, it will be observed that the organisms with the most favorable traits will be the most dominant in the environment.

Therefore, for the Year 5 and Year 10, the most likely trend that will occur is that the organisms with harmful characteristics will be decreasing in the plant population while organisms with neutral or beneficial traits will likely be increasing in number.

Learn more about natural selection at: https://brainly.com/question/14385908

#SPJ1

What would the most accurate model for the theory of evolution look like?

Answers

Answer:

Comparing DNA

Explanation:

Darwin could compare only the anatomy and embryos of living things. Today, scientists can compare their DNA. Similar DNA sequences are the strongest evidence for evolution from a common ancestor.

What part of the reproductive system is highlighted below? A. Vas deferens B. Urethra C. Seminal vesicles D. Epididymus​

Answers

It’s is option D Epididymus

The highlighted part in the below diagram of the male reproductive system is Epididymus. The correct option is D.

What is Epididymus?

The highlighted part in the reproductive system is the epididymis, it is located with vas deferens in close proximity to each other and are involved in the transport and storage of sperm.

The urethra and seminal vesicles are also important components of the male reproductive system, but they are not typically highlighted in diagrams or illustrations of the reproductive system.

Each testis has a little, tightly coiled tube linked to it (the male sex glands that produce sperm). Male reproductive cells known as sperm travel from the testicles into the epididymis, where they mature and are then stored.

Therefore, the correct option is D.

Learn more about Epididymus here:

https://brainly.com/question/27122048
#SPJ7

Is this right if not please tell me the right answer!

Answers

They share A plasma membrane and ribosomes and dna and cytoplasm

what does it mean when it says "glycolysis had a netto effect of two ATP molecules"​

Answers

The statement "glycolysis had a net effect of two ATP molecules"​ is due to the production of 4 ATP molecules and use of two ATPs during these reactions.

What is glycolysis?

Glycolysis is the first step of cellular respiration, which is well know to produce two ATP molecules.

The complete process generates four ATP molecules but two ATPs are used during glycolysis reactions.

In conclusion, the statement "glycolysis had a net effect of two ATP molecules"​ is due to the production of 4 ATP molecules and use of two ATPs during these reactions.

Learn more about glycolysis here:

https://brainly.com/question/737320

#SPJ1

20 points

Describe the origin and insertion points for the large forearm muscle

Answers

the origin are the Anterior surface of the scapula and the isertion is the upper radius.

Which conditions are necessary for the diffusion of a substance to occur across a membrane

Answers

Difference in concentration gradient.
Other Questions
Which statement regarding rigor mortis in fish is true? Group of answer choices Rigor mortis can last anywhere from 10 to 15 minutes depending on the species, temperature, and condition of the fish when caught. During rigor mortis, the water-holding capacity of the proteins is decreased, which makes fish flesh juicier than that of fish that have not undergone rigor mortis. Cooking fish prior to rigor mortis results in a tough-textured flesh. The stronger the rigor mortis is, the more delicate and desirable the texture of the flesh. What happens to sound waves from an object as it moves toward you?The pitch gets higher because of an increase in wavelength.The pitch gets lower because of an increase in frequency.The pitch gets lower because of an increase in wavelength.The pitch gets higher because of an increase in frequency. The diagram shows a convex polygon.What is the sum of the interior angle measures of this polygon? Minaret, Inc., issued 10,000 shares of $50 par value preferred stock at $68 per share and 12,000 shares of no-par value common stock at $15 per share. The common stock has no stated value. All issuances were for cash. a. Prepare the journal entries to record the share issuances. b. Prepare the journal entry for the issuance of the common stock assuming that it had a stated value of $4 per share. c. Prepare the journal entry for the issuance of the common stock assuming that it had a par value of $2 per share. To quickly identify the least populated country in a given region what type of distribution map would you use what is circumference? Triangle ABC is rotated 180 degrees about the origin. Describe the relationship between the corresponding angles of triangle ABC and its image You ensure that all knives are locked away before a individual with a history of aggression enters the area. This best exemplifies which core ethical principle Read the paragraph.Like so many of the Greek divinities, however, therefined conception of the Muses is somewhat marredby the acerbity with which they punished any effort onthe part of mortals to rival them in their divine powers.An instance of this is seen in the case of Thamyris, aThracian bard, who presumed to invite them to a trial ofskill in music. Having vanquished him, they not onlyafflicted him with blindness, but deprived him also ofthe power of song.The author uses a word that means "harsh bitterness" inthe text. Choose the word in the paragraph that bestrepresents that idea.Odivinemarredafflictedacerbity Angel is training for a weight-lifting competition. It is his first one, so he does not expect to win. He is just interested in seeing if he likes it. At the same time, he wants to be competitive. He has decided to work out with a trainer for the last few weeks and is figuring out where to fit that into his schedule. Should he plan on daily workouts? I think its B. no, even intense training required rest days. eatness17Select the correct answer from each drop-down menu.What structural element of the paragraph is the underlined sentence, and how does it connect ideas in the text?The underlined sentence isIt connects ideas in the text byReset PLSSS HELP IF YOU TURLY KNOW THISS In which stage of life will the sun undergo the most change?. What African tree is also called the "upside-down tree"? sequoia baobab acacia palm Should people eat at a lower trophic level? Outline three pros and three cons of eating only plants and plant products. The begining of this chemical equation represents the starting materials for a chemical reaction which compound us likely produced by the chemical reaction H20+ SO3 If you roll a dice four times, what is the chance that you roll a 2? What key features do the functions f(x) = 3x and g of x equals the square root of the x minus 3 end root have in common? Both f(x) and g(x) include domain values of [3, ) and range values of (0, ), and both functions are positive for the entire domain. Both f(x) and g(x) include domain values of [3, ) and range values of (, ), and both functions have an x-intercept in common. Both f(x) and g(x) include domain values of [3, ) and range values of (0, ), and both functions have a y-intercept in common. Both f(x) and g(x) include domain values of [3, ) and range values of (, ), and both functions increase over the interval (3, 0). What do the indicators used by economists reveal?changes in production and demandchanges in employment levelschanges in priceschanges in the health of an economy Which lines from "Mending Wall" best indicate that the speaker is amused while repairing the wall?We have to use a spell to make them balance:Stay where you are until our backs are turned!And he likes having thought of it so wellHe says again, Good fences make good neighbours.We wear our fingers rough with handling them.Oh, just another kind of out-door game,No one has seen them made or heard them made,But at spring mending-time we find them there.