What describes an alternating current? (Choose all that apply)
can be transmitted over great distances
moves in two directions
can be used only for short distances
moves in only one direction

Q1. Antiviral drugs may target the following except A. viral ribosomes.

Q2. The process used for identifying the Q3.different carbohydrates of streptococci is called A. Lancefield grouping.

Q4. The cause of strep throat is B. Streptococcus pyogenes-beta-hemolytic, group A.

Q5. Virulence factors used by S pyogenes may be

A. Protein F.

B. M Protein.

C. a capsule.

D. Protein G.

E. All of the choices are correct.

Protein F attaches to surface protein on epithelial cells called fibrin. M protein is an adhesin and inactivates opsonin C3b and avoids activating complement inflammatory response. Capsule mimics host cell hyaluronic acid and hides cell from phagocytes, Protein G is an Fc receptor that binds Fc part of opsonizing IgG.

Q6. The most common bacterial pathogen(s) involved with sinusitis, otitis media and conjunctivitis is/are E. H. influenzae AND S. pneumoniae

Pathogens are microorganisms that can cause infection in humans and animals. The types are also different from normal microorganisms that live in the human body, such as probiotics in the digestive tract or normal flora on the surface of the skin and vagina.

Even though they are classified as germs, this probiotic and normal flora do not cause disease, instead they protect the human body from various pathogens that trigger infection and disease.

Pathogens can attack the human body and cause disease when the immune system is weak. Apart from that, the entry of pathogens into the body can also come from wounds or injuries, consumption of contaminated food or drink, and close contact with people who are sick.

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The statement that the student should give in support of the claim is C. All biomolecules contain carbon skeleton, hydrogen, and oxygen. This is because all biomolecules, are made up of these elements.

The carbon skeleton in sugars produced by plants during photosynthesis serves as the building blocks for these biomolecules. All biomolecules are made up of repeating monosaccharides, is not always true, as not all biomolecules are made up of repeating monosaccharides. All biomolecules have nearly the same molecular structures and shapes, is not true as biomolecules have different structures and shapes. Therefore, the student should use statement C to support the claim that sugars produced by plants during photosynthesis provide a carbon skeleton that interacts with other elements to form biomolecules like amino acids, lipids, and nucleic acids.

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Answer: About 2400 kilometers in 5 minutes

Explanation:

about 8km per second

5 min = 300 seconds

8x300=2400

So 2400km

Hope this helps!

Thicker retinas that can catch UV light more proficiently and UV-explicit opsins that broaden their noticeable light range.

As a general rule, light having frequencies somewhere in the range of 380 and 700 nanometers might be seen by people (nm). Inside that reach are the shades of the rainbow, from red the entire way to violet. UV light, notwithstanding, has frequencies that are more limited than 380 nm. They are consequently imperceptible to human sight.

No, as a matter of fact. Aphakia is a condition that makes individuals the option to see UV light beams. Aphakia is the shortfall of an eye focal point, which is every now and again the aftereffect of medical procedure or heredity. They can see past the noticeable range of light since they don't have this focal point, however, it additionally brings about fluffy vision and farsightedness.

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The surgical procedure involves flattening the anterior curvature of the cornea by removing a stromal lamella is Laser-assisted stromal in situ keratomileusis (LASIK).

Penetrating keratoplasty (PK) has been the surgical operation of preference for keratoconus for over seven decades. 12,thirteen However, anterior lamellar keratoplasty (ALK) which entails the selective elimination of corneal stromal tissue is gaining recognition due to its advantages. Laser in situ keratomileusis (LASIK) is a laser-assisted surgical treatment for the correction of visible refractive errors. This pastime will assessment the indications, laser, equipment, contraindications, complications, and long-time period diagnosis of sufferers who go through LASIK.

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The majorly common minerals within the planet Earth are (a) silicates.

Silicate minerals make up more than 90% of the Earth's crust, making silicon the second most prevalent element there. The most widespread minerals on Earth are formed when silicon and oxygen combine. For example, sand is majorly comprised of silica (silicon dioxide), typically in the form of quartz.

2. A crucial semiconductor utilized in the production of electronics and computer chips is silicon. The silica tetrahedron, which is made up of four (b) oxygen atoms and one silicon atom, serves as the fundamental unit of all of these minerals. These are set up so that a tetrahedron is formed by planes traced through the oxygen atoms.

3. Petroleum (c) is not a mineral.

4.  (d) Multiple properties must be used to identify a mineral.

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Skin cells, neurons, muscle cells, and blood cells relate to skin nerve muscle, and blood tissue in a way that Organs are larger units made up of these groups of specialized cells from tissue, and the heart is an example of an organ.

The skin is the body's largest and most important protective organ, covering the entirety of its exterior surface and acting as a first-line physical barrier against the elements. Its functions include temperature regulation and UV radiation protection, as well as trauma, pathogen, microbe, and toxin defense. Immunologic monitoring, sensory awareness, control of insensible fluid loss, and overall homeostasis are all aided by the skin.

A nerve is a bundle of fibers that connects the body to the brain and receives and transmits messages. Chemical and electrical changes in the cells that made the nerves, known as neurons, send the messages.

Muscles are involved in every bodily function. Over 600 muscles make up the muscular system. Smooth, skeletal, and cardiac muscles are 3types. Only the skeletal muscles are voluntary, which means they can be controlled consciously. Smooth and cardiac muscles are uncontrollably active.

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(complete question)

Describe how the skin cells, neurons, muscle cells, and blood cells you have observed related to the functions of skin, nerve, muscle, and blood tissue.

The term hypotonic hydration refers to B) a condition that may result from renal insufficiency or drinking unusual amounts of water

Hypotonics have lower levels of sugar and electrolytes than the human body. Just like isotonic drinks, hypotonic drinks can also replace body fluids lost due to exercise.

Hypotonic solutions have a lower osmotic pressure than other solutions. This is because a hypotonic solution has a lower concentration of solutes than the concentration of solutes in other solutions. Meanwhile, hypotonic dehydration can occur when more sodium is excreted from the body, as a result, the concentration of sodium in the body is lower than normal. This condition can lead to brain edema which is very dangerous.

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Continuous variation is indicated by a bell-shaped curve of phenotypic variance.

correct answer is (b) continuous variation.

'What is phenotypic variation?'

An organism's phenotypes are its qualities or characteristics that are visible to us, such as its size, color, form, abilities, habits, etc. Not every phenotype is genuinely visible. For instance, blood kinds are phenotypes that can only be seen in a lab setting. Genes, environmental factors, or a combination of both can contribute to phenotypes.

The variance in phenotypes that exists in a population is known as phenotypic variation. People come in varied sizes and shapes, for instance; different phenotypes include differences in height, weight, and body form. The capacity to roll your tongue is a changeable trait, as are hair, eye color, and skin tone.

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Expense recognition principle; The expense recognition principle is a notion that specifies when a company's expenses are recorded in its financial statements.

The expense recognition principle is a notion that defines when a company's expenses are recorded in its financial statements. Costs are typically recognised and recorded in the same time as the revenues associated with those expenses under the expense recognition principle (under accrual accounting).

This accounting approach allows organisations to align costs with revenues connected to those expenses (for example, commissions owed to employees for certain sales recorded when those sales happen, rather than later). Put another way, it depicts the firm employing assets and turning them to costs when their usefulness is depleted.

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Full Question :Identify the accounting concept or principle that gives the most direction on how to account for each of the following​ situations:

a. Salary expense of​ $48,000 is accrued at the end of the period to measure income properly.

A phylogeny, or hypothetical link between groups of creatures, is depicted in a diagram known as a cladogram.

A phylogenetic systematics researcher will use a cladogram to depict the groups of organisms being compared, their relationships, and their most recent shared ancestors.

A cladogram might be quite complicated and compare every known form of life, or it can be extremely simple and compare just two or three groups of creatures.

Cladogram design is straightforward but ubiquitous. The creatures being examined, lines, and nodes where those lines intersect make up a cladogram.

Therefore, A phylogeny, or hypothetical link between groups of creatures, is depicted in a diagram known as a cladogram.

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Almost all economists agree that tariff and import quotas :

Hence option D - Both B and C is correct.

Merchants espoused the idea of ​​these regulations to protect the domestic economy and for national security. Economists see these tariffs as a means of reducing overall economic welfare as they burden markets and hurt domestic producers.

Tariff quotas allow a certain amount of imported goods to be brought in at a reduced rate during the quota period. You can still import goods after you reach your tariff quota limit, but the tariff rate will be higher.

Quotas limit the amount of goods imported from other countries. Customs duty is a fee charged on the value of goods imported from another country.

Tariffs and quotas are two common forms of trade restrictions imposed by governments to protect domestic producers.

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Answer:B) the energy decreases as the amplitude increases.

Explanation:

Answer:

2) Inducible post-infection. Chitosan works by stimulating the immune response of potato tubers cells, which is similar to the role of inducible post-infection. Inducible post-infection is a process in which a host cell releases molecules in response to an infection that activate the immune system, leading to an increased production of defensive proteins, which can then help fight off the infection. This process is similar to how chitosan works, as it triggers an immune response in the cells that can help fight off the infection.

Energy is used, converting ATP to adp.

When one phosphate group is removed by breaking a phosphoanhydride bond, a process known as hydrolysis occurs, releasing energy and converting ATP to adenosine diphosphate (ADP). When a phosphate is taken from ADP to generate adenosine monophosphate, energy is also released (AMP). These three phosphate groups are connected by two high-energy connections known as phosphoanhydride bonds.

This free energy can be transferred to other molecules to favourably affect undesirable processes in a cell. To store energy again, AMP can be regenerated into ADP or ATP by establishing new phosphoanhydride bonds. AMP, ADP, and ATP are continually interconverted in the cell as they engage in biological activities.

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To diagnose medical disorders, radiography uses X-rays to take a single image of the bodily tissues. A specific sort of radiography used on the breasts is called mammography. It is utilised for breast cancer screening.

The type of imaging test utilised and the area of the body being examined determine how much radiation is exposed during an imaging test. For illustration: The patient is exposed to around 0.1 mSv during a single chest x-ray. This is roughly equivalent to the radiation exposure that people experience over the course of about 10 days when exposed naturally.

X-rays (including dental, chest, and spine x-rays), CT or CAT (computed tomography) scans, and fluoroscopy are a few typical examples of imaging exams.

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May increase the risk of a cancer occurring later in life patients who receive multiple examinations using ionizing radiation such as diagnostic x-rays ct and fluoroscopy.

CT scans normally require extra exposure to radiation than common x-rays because they use a chain of x-ray pictures. expanded exposure means a barely higher risk of feasible short-term and long-term health results.

up to now, there may be no evidence of genetically heritable chance in human beings from exposure to x-rays. below a few rare circumstances of extended, high-dose exposure, x-rays can purpose other damaging health effects, along with pores and skin erythema (reddening), skin tissue injury, and start defects following in-utero exposure. Fluoroscopy tests can assist diagnose esophageal issues, ulcers, hiatal hernia, GERD (gastroesophageal reflux ailment), structural problems inside the GI tract and tumors.

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Answer:D. replacement of worn out cells

Explanation:

the main purpose of mitosis is Replacement of cells - particularly cells that have been worn out, damaged, or old cells

After Meiosis I division there will be a half set of chromosomes that means 23 pairs of homologous chromosomes.

Meiosis is called the reduction division where a diploid cell is reduced to form haploid cells by division of homologous chromosomes and their crossing over.The division of homologous chromosome and crossing over occur during Meiosis I and 2 haploid cells are formed as a result.

Each haploid cell formed is further divided to form 4 haploid cells or gamete in Meiosis II.Formation of Gametes or Gametogenesis occur through Meiosis. The Prophase of Meiosis I is the stage at which Crossing over takes place.

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The best defense is offense means to get a strategic edge, the aim is to be proactive (take a forceful offensive action) rather than passive. This will keep the enemy off balance and prevent it from mounting a counterattack.

The opposition will be kept off balance as a result, making it impossible for it to launch a counterattack.

Attacking troops must be at least three times as powerful as defending forces as a general rule. Many times, they ought to be even more powerful, particularly when it matters most. But the defense is rarely, if ever, the deciding factor. It is simply a stopgap measure until the offensive can resume.

Defense is when a team tries to stop the opposing side from scoring, while offense is when a team attempts to score.

Therefore, Defense is when a team tries to stop the opposing side from scoring, while offense is when a team attempts to score.

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As a solid, water floats. This means that solid water is less dense than liquid water, and organisms in ponds, lakes, and reservoirs can survive under the ice cover because the hydrogen bond arrangement differs between ice and liquid water. So the answer is all correct.

Hydrogen bond formation plays an important role in liquid water. When water molecules form hydrogen bonds with each other, water develops several unique chemical characteristics compared to other liquids. One is that when the temperature of the water drops and freezes, the water molecules form crystal structures held together by hydrogen bonds. This makes ice less dense than liquid water.

This is an anomaly when the ice density is low. This low density of ice causes ice to float on the surface of liquid water, much like ice cubes in a glass of water. In lakes and ponds, ice forms on the surface of the water creating an insulating barrier that protects the animal and plant life in the pond from freezing. Without this insulating layer of ice, the plants and animals that live in the pond would freeze in the solid block of ice and not survive.

From the explanation, the answer choices above are all correct.

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To prevent iron deficiency, it is important for children aged 1-3 years old need 7 milligrams of iron per day, while children aged 4-8 years old need 10 milligrams of iron per day.

Iron deficiency is a common nutrient deficiency that can affect children and adults. It occurs when the body does not get enough iron from the diet or is unable to absorb enough iron from the food that is consumed. Iron is an essential nutrient that is needed for the production of red blood cells, which carry oxygen throughout the body.

To prevent iron deficiency, it is important for children to get enough iron in their diet. The recommended daily intake of iron for children varies depending on their age and gender. According to the Centers for Disease Control and Prevention (CDC), children aged 1-3 years old need 7 milligrams of iron per day, while children aged 4-8 years old need 10 milligrams of iron per day.

To ensure that children are getting enough iron in their diet, it is important to include iron-rich foods in their meals and snacks. Some good sources of iron for children include meat, poultry, fish, beans, fortified cereals, and dried fruits. It is also important for children to consume foods that are rich in vitamin C, as vitamin C can help the body absorb iron more effectively.

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During the Industrial Revolution, factories were tiny and enclosed locations. They were frequently built without windows or sufficient ventilation

what does factories means ?

a structure or collection of buildings having facilities for the manufacturing of commodities.

any location that produces a homogenous product with little regard for individuality:

They call it a legal school, but it's really just a degree mill.

(previously) a place of business for factors and merchants doing business in another nation.

A plant is a structure or set of buildings where items are made.

Check out the factory ship.

A foreign business establishment for commercial agents or factors.

A rock band that was a hit-tune factory; a hotel that acted as an illicit narcotics factory were the sources of prolific output.

During the Industrial Revolution, factories were tiny and enclosed locations. They were frequently built without windows or sufficient ventilation, and as a result, the machinery rapidly caused the factory's interior temperature to rise substantially. All of this combined to make the workers' situation dreadful.

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A split-brain client is shown a frog in her right visual field. This information is processed by the left side of the Occipital lobe.

The occipital lobes sit at the back of the head and are responsible for visual perception, including color, form and motion. The occipital lobe is responsible for highly complex visual functions, including:

Because of its location at the back of the head, the occipital lobe is less susceptible to injury than some other parts of the brain. Even if the occipital lobe is damaged, other regions of the brain may be able to compensate and take over some of its functions. Complete damage to the primary visual cortex can cause cortical blindness, though.

Riddoch Syndrome is a rare condition that can also be caused by damage to the occipital lobe. Those affected can only see an object if it's moving in their visual field.

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Carbon and Hydrogen are present in organic compounds.

Organic molecules are those with carbon-hydrogen bonds. The most fundamental organic molecules are hydrocarbons, which are made up exclusively of hydrogen and carbon atoms. Unique chemical and physical characteristics of organic compounds include low melting and boiling points, high solubility in organic solvents, nonconductivity of electricity, isomerism potential, covalent bonding predominance, and flammability. The majority of the foods we eat on a daily basis, including sugar, lipids, starches, vinegar, and others, are essentially organic substances. Although man has been aware of chemical molecules from the beginning of time, it wasn't until the eighteenth century that they really started to be studied! In the year 1807, Berzelius came up with the phrase "organic compound."

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If fertilization occurs, the corpus luteum is maintained because the embryo secretes human chorionic gonadotrophin.

The correct option is D.

An embryologist uses sperm from a spouse or donor to fertilize one or several of the collected eggs in order to produce an embryonic (a fertilized egg). For about five to seven days, the embryo is watched as it develops in a petri dish.

You may arrange a ceremony or self-made ritual to memorialize the departure of the embryos, regardless of whether the wasted embryos be disposed of at the facility or handed to you for burial. Some clinics also provide the option of transfer the embryos to her uterus during a period of your cycle when getting pregnant is not feasible.

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Nitrogen is also important to the chemical industry. Nitrogen is used in the production of fertilizers, nitric acid, nylon, dyes, and explosives.

Examples of organic nitrogen compounds are amides, amines, imines, imides, azides, azo composite, cyanates, isocyanates, nitrates, nitro compounds, and so on. Nitrogen is one of the major part elements of nitrogenous bases, nucleic acids, amino acids, and proteins.

The largest lake of nitrogen is found in the atmosphere, mainly as nitrogen gas (N2). Nitrogen gas assembles up 78% of the air we breathe. Most nitrogen enters ecosystems via sure kinds of bacteria in soil and plant roots that change nitrogen gas into ammonia (NH3). This procedure is called nitrogen fixation.

So we can conclude that Nitrogen is fixed, or together, in nature as nitric oxide by fulmination and ultraviolet rays.

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Tiny, ubiquitous, metabolically diverse  of the following describe all existing bacteria.

Some bacteria aid in digestive process, the body's production of vital vitamins, and the eradication of disease-causing cells. Additionally, microorganisms are employed in the production of wholesome foods like cheddar cheese and yogurt. On the other hand, contagious germs can potentially make you ill. They multiply swiftly throughout your body.

When bacteria taken into the body, multiply, and trigger an immune response in the body, a bacterial infection results. Thru an opening in your skin, for instance a cut or surgical incision, or through your airway, germs can enter your body and cause diseases like bacterial pneumonia.

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Most white blood cells cannot divide and have the ability to reproduce on their own.

How do the white blood cells reproduce?

The white blood cells are not the same as other cells in the body. They act like a single organism, which moves on its own and feeds on other bacteria and cells. Most white blood cells cannot reproduce independently because they are produced in the bone marrow. In people with normal bone marrows, the number of white blood cells will double in hours. The blood cell is produced in a bone marrow and is located in the blood lymph tissue. The white blood cells play a key role in the human body system. They protect the red blood cells from any pathogens.

Many white blood cells cannot divide, and they can reproduce on their own. Thus, it is okay to conclude that the cells that move freely, feed on bacteria and pathogens, and can harm the human body, are known as white blood cells.

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In microscope, each kind of cell is present in the numbers best situated to meet the need of the body.

A microscope is an instrument that is used to magnify small objects. Some microscopes can even be used to observe an object at the cellular level, allowing scientists to see the shape of a cell, its nucleus, mitochondria, and other organelles.

A microscope is an instrument that makes an enlarged image of a small object, thus revealing details too small to be seen by the unaided eye. The most familiar kind of microscope is the optical microscope, which uses visible light focused through lenses.

The optical parts of the microscope are used to view, magnify, and produce an image from a specimen placed on a slide.

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Populations in which the probability of dying is constant at every age exemplify type II survivorship.

The proportion of deaths over time is constant in populations with Type II survival. Type II survivorship curves depict populations with a fixed percentage of deaths occurring at each age interval. These creatures frequently produce a small number of young and provide them with a lot of parental care, just like species that demonstrate Type 1 survival.

Young-onset mortality is quite high in populations with Type III survival. The majority of genuine populations are a mixture of these three categories. For certain species, Type III survival of juveniles is followed by Type II survival of long-lived adults.

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