what takes place during the acquisition step in the crispr/cas defense against viral infection in bacteria?

Answers

Answer 1

During the acquisition step in the CRISPR/Cas defense against viral infection in bacteria, the bacteria incorporate fragments of viral DNA or RNA into their own genome. This process allows the bacteria to "remember" the viral genetic material and mount a specific defense against future infections by the same or closely related viruses.

1. Viral Infection: Bacteria get infected by a specific virus (also known as a bacteriophage) that carries its genetic material in the form of DNA or RNA.

2. Recognition: The CRISPR/Cas system in the bacteria recognizes the invading viral DNA or RNA as foreign.

3. DNA Fragmentation: The bacterial CRISPR-associated (Cas) proteins cleave the viral DNA or RNA into smaller fragments.

4. Spacer Acquisition: The bacteria select a small fragment of the viral genetic material and incorporate it into their own genome. This small fragment is known as a spacer.

5. Integration: The spacer is integrated into a specific region of the bacterial genome known as the CRISPR array. The CRISPR array consists of multiple spacers separated by repetitive DNA sequences.

6. Memory: The CRISPR array with the newly acquired spacer becomes a heritable memory of the viral infection, allowing the bacteria to recognize and respond to the same or similar viruses in the future.

7. Adaptation: The CRISPR/Cas system, with the help of other proteins, ensures the accurate insertion of the spacer into the CRISPR array and protects it from degradation.

By incorporating spacers derived from viral genetic material, bacteria can use the CRISPR/Cas system to recognize and destroy specific viral DNA or RNA sequences during subsequent infections. The acquired spacers serve as a genetic memory that allows the bacteria to mount a targeted immune response against viral invaders.

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Related Questions

What process cause changes to occur on wet paper?

Answers

The paper get wet and it rips easily

a typical piece of paper is composed mostly of cellulose wood fibers. These fibers are reinforced and fused by strong hydrogen bonds. When paper gets wet, however, those bonds are damaged and the fibers separate more easily. In turn, the paper becomes weak and tears.

The ultimate source of energy for ATP synthesis in chloroplasts is
A. light.
B. energized chlorophylls.
C. electron transport.
D. the electrochemical proton gradient across the thylakoid membrane.
E. the electrochemical proton gradient across the chloroplast outer membrane.

Answers

The correct answer is (D) The electrochemical proton gradient (PMF). In photosynthesis, light energy is used to remove electrons from water and excite.

It is the creation of ATP from ADP using sunlight energy, which occurs during photosynthesis. ATP is also produced during the process of cellular respiration in a cell's mitochondria. This can be accomplished through either aerobic respiration, which requires oxygen, or anaerobic respiration, which does not.

Chloroplasts convert the Sun's light energy into sugars that cells can use. It functions similarly to a solar panel, converting sunlight energy into electrical energy. The entire process is known as photosynthesis, and it is entirely dependent on the small green chlorophyll molecules found in each chloroplast.

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PLEASE I HAVE UNDER 30 MINUTES!!! (No links)
[botany] Boll Weevils are an invasive species that has developed resistance to many major pesticides. Evaluate how
this influences the Boll Weevils' success and the options that can be used to control them.

Answers

Answer:

boll weevills succes is greatly dependent on its ability to adapt and invade homes this way they are able to live in sheltered areas made by humans and the humans can't get rid of them. a potential way to get rid of them is to find a poison that they'll take for food and that will surely kill them and not just maybe.

Although actin monomers can aggregate and act as nucleators of actin polymerization in vitro, cells containnucleating proteins (e.g., Arp2/3) that can be activated to induce polymerization. How does having activatablenucleating factors benefit the cell

Answers

Having activatable nucleating factors, such as Arp2/3, benefits the cell in several ways: Regulation of Actin Polymerization: Activatable nucleating factors provide tight control over actin polymerization within the cell.

This regulation is crucial for maintaining the proper balance between actin assembly and disassembly, cell division, and intracellular transport. Spatial and Temporal Control: Activatable nucleating factors enable localized actin polymerization at specific cellular locations or during specific time frames. By activating nucleating factors only in specific regions or at specific times, the cell can precisely regulate actin dynamics in a spatiotemporal manner. This spatial and temporal control is critical for processes like cell polarization, formation of cellular protrusions, and establishment of cell-cell junctions. Actin-based Structures and Cellular Functions: Activatable nucleating factors contribute to the formation of specialized actin-based structures, such as lamellipodia, filopodia, and stress fibers.

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While the neurology resident, Dr. Takahashi, was performing her examination, Sally asked her what a nerve was made of exactly. Which of the following statements is true regarding the cellular structure of a neuron? The neurology resident told Sally that axons of neurons make up the nerves that transfer information between the PNS and CNS. The neurology resident told Sally that the cell body, or some, made up the nerves and that this structure was what allowed the signal to travel between the CNS and PNS. The neurology resident told Sally that neurons and their dendrites, which send and reccive signals, made up the nerves and that the information was transported only from the PNS to the CNS. The neurology resident told Sally that neurons and their dendrites, which send and receive signals, made up the nerves and that the information was transported only from the CNS to the PNS.

Answers

The statement that is true regarding the cellular structure of a neuron is; The neurology resident told Sally that neurons and their dendrites, which send and receive signals, made up the nerves and that the information was transported only from the PNS to the CNS. Option A is correct.

This statement accurately describes the composition of nerves and the direction of information transmission. Neurons, which consist of a cell body, dendrites, and an axon, are the basic building blocks of the nervous system. Dendrites receive signals from other neurons, while the axon transmits signals to other neurons.

Nerves, on the other hand, are composed of bundled axons of neurons and are responsible for transmitting information between the peripheral nervous system (PNS) and the central nervous system (CNS). The information flow typically occurs from the PNS to the CNS.

Hence, A. is the correct option.

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--The given question is incomplete, the complete question is

"While the neurology resident, Dr. Takahashi, was performing her examination, Sally asked her what a nerve was made of exactly. Which of the following statements is true regarding the cellular structure of a neuron? A) The neurology resident told Sally that axons of neurons make up the nerves that transfer information between the PNS and CNS. B) The neurology resident told Sally that the cell body, or some, made up the nerves and that this structure was what allowed the signal to travel between the CNS and PNS. C) The neurology resident told Sally that neurons and their dendrites, which send and receive signals, made up the nerves and that the information was transported only from the PNS to the CNS. D) The neurology resident told Sally that neurons and their dendrites, which send and receive signals, made up the nerves and that the information was transported only from the CNS to the PNS."--

Which term describes a single female arctic The group of polar bears that live along the eastern coast of Russia makes upfox?

Answers

The term that describes a single female arctic fox is a vixen.

A vixen is a female fox, including the arctic fox, that is not pregnant or nursing young. It belongs to the Canidae family and is found in the tundra and other Arctic regions of the Northern Hemisphere.The Arctic fox is a small, compact, and sturdy mammal that can survive in some of the world's harshest environments.

The population of Arctic foxes that lives along the eastern coast of Russia is not referred to as a group of polar bears. It is known as a population, a community, or a family.A population is a group of animals of the same species that live in the same area and interact with one another.

A family of arctic foxes is made up of a male and female adult and their offspring. They live together in underground dens that are used for shelter and protection.Arctic foxes are considered a keystone species in the Arctic region because they play a crucial role in the ecosystem. They feed on small animals like lemmings and voles, which helps to regulate their populations. In addition, they are a food source for larger predators like wolves and polar bears, which helps to maintain balance in the food web.

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PLZ!! THIS IS FOR DEKU!! he's gonna help me with this..
_________________
What happened to the water in the cells? Why?
here deku!! hope this helps!

Answers

Answer:

deku aint gonnahelp on this one

Explanation:

Answer:

Deku is Smart just ask him -_-

Explanation:

Which term is described when measuring the number of liters of gas trapped in a bottle? question 10 options: volume mass pressure horsepower

Answers

The term described when measuring the number of liters of gas trapped in a bottle is volume. Volume is the amount of space that a substance or object occupies. The volume of gas can be measured using different units like liters, cubic meters, or milliliters. The instrument used for measuring the volume of gas in a bottle is called a gas burette.

Step 1: When measuring the number of liters of gas trapped in a bottle, the term used to describe it is volume.

Step 2: The volume is the amount of space that a substance or object occupies.

Step 3: To measure the volume of gas in a bottle, instruments like gas burettes or other measuring tools can be used. These tools allow us to accurately measure the volume of gas within the container.

By using these tools, we can accurately determine the volume of gas and make calculations based on this value. Therefore, volume is an essential concept in the field of chemistry and physics, especially when dealing with gases.

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the patient has a total wbc of 18,000 cells/ml. there are 50% mature polymorphonuclear cells, many band cells and 15% lymphocytes. your analysis is:

Answers

The patient's total white blood cell count (WBC) is 18,000 cells/mL, with 50% of those cells being mature polymorphonuclear cells, many band cells, and 15% lymphocytes. This indicates a mature neutrophilic leukocytosis, which is commonly seen with acute bacterial infections.


Given data:

Total WBC count of the patient = 18,000 cells/ml.

Mature polymorphonuclear cells = 50%Band cells = many15% lymphocytes.

Findings:

An increase in total WBC count with the predominance of mature polymorphonuclear cells and the presence of many band cells indicate a bacterial infection. Bacterial infection typically results in an increase in the number of neutrophils, including mature and immature neutrophils (bands).Hence, the analysis of the patient is suggestive of a bacterial infection.

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The following list describes a certain set of objects in our solar system.
no solid surfaces
thick atmospheres
many rings and many moons
Which is the most likely set of objects described by this list?

Answers

The correct answer would be inner planets, Terrestrial planets is another name for the inner planets.

What are inner planets?

There are a total of eight planets in our solar system. The outer planets and the inner planets are two other major groups into which planets can be divided. Earth, Mercury, and Mars are considered inner planets since they are situated within the asteroid belt (region of asteroids between Mars and Jupiter). Furthermore, because they are made of minerals and metals, inner planets differ from other planets in terms of their composition. These planets are also referred to as terrestrial planets because of their makeup.

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Why are whales classified as mammals

Answers

Answer:

They give birth to young, have fur, have lungs, and provide milk for the young.

Explanation:

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According to the UCSB Science Line, Whales are mammals because they give birth to young, have fur, ( even though it may not be visible ) have lungs and breathe, and provide milk for the young.

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I got these facts from the UCSB Science Line, you can check it out if you want.

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Hope this helps! <3

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which term describes the minimum level to which a membrane must be depolarised in order for an action potential to be fired?

Answers

Threshold potential describes the minimum level to which a membrane must be depolarised in order for an action potential to be fired.

The minimal magnitude required to start an action potential is known as the threshold potential. The voltage-gated sodium (Na+) ion channel opens in response to membrane an action potential, resulting in a rapid depolarization. The crucial level at which a membrane potential must depolarize membrane in order to start an action potential is known as the threshold potential. In neuroscience, threshold potentials are essential for controlling and propagating membrane  signals in the peripheral and central nervous systems.

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How are heat and temperature related?

A :temperature and heat measure the same thing

B :thermometers measures he

C: Heat causes a change in temperature

Answers

Answer:

C

Explanation:

Heat causes changes in the temperature of objects

The vesicles that form between the two plant daughter cells are small buttles of phospholipid membrane formed by the Golgi apparatus . When these vesicles fuse , what do they become?

Answers

When the vesicles formed by the Golgi apparatus fuse between two plant daughter cells, they become the cell plate.

During cell division in plant cells, a structure called the cell plate forms between the two daughter cells. The cell plate is composed of vesicles derived from the Golgi apparatus. These vesicles contain components such as cell wall materials, membrane proteins, and other substances needed for cell division. As the vesicles fuse together, they merge with each other and with the existing plasma membrane, gradually expanding and forming the cell plate.

The fusion of the Golgi-derived vesicles allows for the deposition of new cell wall material and the synthesis of a new plasma membrane, ultimately separating the two daughter cells and completing the process of cytokinesis. Therefore, the vesicles formed by the Golgi apparatus become the cell plate through fusion, contributing to the growth and division of plant cells.

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Carefully distinguish between the terms differentiation and determination. Which phenomenon occurs initially during development? a. Determination refers to early developmental and regulatory events by which cell fate is fixed. Once fixed, differentiation is the manifestation of the determined state, in terms of genetic, physiological, and morphological changes. b. Differentiation refers to early developmental and regulatory events by which cell fate is fixed. Once fixed, determination is the manifestation of the differentiated state, in terms of genetic, physiological, and morphological changes. c. Both terms refer to early developmental and regulatory events that confer a spatially discrete identity on cells. d. Both terms refer to the manifestation of spatial identity, in terms of genetic, physiological, and morphological changes. Neither occurs initially during development Submit Request Answer

Answers

The correct answer is A. Determination refers to early developmental and regulatory events by which cell fate is fixed. Once fixed, differentiation is the manifestation of the determined state, in terms of genetic, physiological, and morphological changes.

This involves a series of early developmental and regulatory events that ultimately fix the cell's fate and determine what type of cell it will become. Once a cell is determined, it undergoes differentiation, which is the process by which it acquires specialized characteristics and functions that are unique to its specific cell type. Differentiation involves genetic, physiological, and morphological changes that occur as the cell matures and becomes more specialized.

In summary, determination occurs initially during development as cells become committed to specific fates, while differentiation is the manifestation of the determined state and involves the acquisition of specialized characteristics and functions.

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What are the most common symptoms of musculoskeletal diseases and disorders?

paralysis

pain

numbness

inflammation

weakness

Answers

The most typical signs of musculoskeletal disorders are pain, numbness, weakness, and a reduction in motion range.

Diverse ailments that affect the bones, joints, muscles, and connective tissues are referred to as musculoskeletal disorders. These conditions may cause discomfort and function loss.

Muscles and bones combine to form musculoskeletal disorders. It is a condition that impairs bodily motion.

The most common, expensive, and incapacitating medical diseases in the US are musculoskeletal disorders. The basic mechanisms through which musculoskeletal problems result in disability and loss of employment are a loss of function and chronic pain.

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What is fertilisation?​

Answers

The action or process of fertilizing an egg, female animal, or plant, involving the fusion of male and female gametes to form a zygote.

An ecologist collected climate data from two locations. The graph shows the monthly average temperatures in the two locations. In Location A, the total yearly precipitation is 273 cm. In Location B, the total yearly precipitation is 11 cm. Whats the answer?

Answers

Answer:

More organisms are present on location A.

Explanation:

Due to more yearly precipitation, there is more vegetation present on location A. Due to the presence of this vegetation, more organisms are present because there is more food available for organisms as compared to location B. Due to less precipitation, there is less or no vegetation is present on location B and organisms are present in less number due to harsh environmental conditions and no food availability for organisms.

What's an example of a science experiment we do everyday?​

Answers

Answer:

baking soda volcano

mentos and soda

vegitable battery etc...

Answer:

Digestion

Explanation:

Which organelle of a cell functions similarly to the envelope of a virus and why?

Answers

Answer: linear or circular. include genes encoding viral proteins: capsid, envelope proteins, any polymerase not found in the host cell. viruses may have a lipid envelope.

Anemia is a medical condition in which the affected person lacks enough red blood cells. What two effects will such a condition have on the patient?

The patient will have less hemoglobin in the blood.
The patient will have less immunity against bacteria.
The patient will have a reduced oxygen supply to the cells.
The patient will have a thicker blood composition.
The patient will have increased platelets in the body

Answers

Answer:

The patient will have a reduced oxygen supply to the cells

Answer:

The patient will have a reduced oxygen supply to the cells

Explanation:

edmentum

Only one plane divides the bodies of humans, dogs, and rabbits into roughly symmetrical "left" and "right" halves.


What type of symmetry do these organisms have?
A.
orbital
B.
bilateral
C.
radial
D.
rotational

Answers

Answer:          Bilateral

Explanation:

symmetry is a type of symmetry in which only one plane divides an organism into halves that are roughly mirror images of each other. The halves need to be mirror images only on the exterior.

If more than one plane of symmetry exists for an organism's body, then it is radially symmetric.

what are the components of the transport system in human beings what are the function of these compounds​

please please answer it

Answers

The heart, blood, and blood vessels are parts of the human body's transport system. The heart's job is to circulate oxygenated blood throughout the human body. It also collects deoxygenated blood from various body areas and transfers it to the lungs where it gets oxygenated.

The Blood vessels come in three different types: arteries, veins, and capillaries. Each human body of these participates in the circulation process in a very specific way. Oxygenated blood is transported from the heart through arteries. Although they have a robust exterior, they also have a smooth internal layer of epithelial cells that the  facilitates easy blood flow.

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the thymus plays an important role in the development of t cells. true false

Answers

True. The thymus is a gland located in the chest that plays an important role in the development of T cells, which are a type of immune cell that plays a central role in cell-mediated immunity.

In the thymus, immature T cells are presented with fragments of proteins from other cells, known as antigens, on the surface of thymus cells. If the immature T cells recognize and bind to the correct antigen, they are allowed to mature and become functional T cells. If the immature T cells do not recognize the correct antigen, they are eliminated from the thymus and die.

Overall, the thymus plays a critical role in the development of T cells by providing a selective environment in which immature T cells can mature and become functional cells that can recognize and respond to specific antigens.  

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Although all known cellular life and some viruses contain DNA, biologists in the

early 1900's had difficulty identifying DNA as the genetic material because of its

apparent simplicity. Although it is a long polymer, it is only composed of four

subunits-A, T, C, and G. It wasn't until the 1940's that scientists came to the

conclusion that DNA was in fact the molecule that contained the genetic

material. In 2-3 sentences, describe how DNA molecules store genetic

information for cells.

Answers

DNA molecules store genetic information for cells in sequences of four bases of nucleic acid — adenine (A), thymine (T), cytosine (C) and guanine (G) that are strung along ribbons of sugar- phosphate molecules in the shape of a double helix.

What is a DNA?

Deoxyribonucleic acid (DNA) is described as a polymer composed of two polynucleotide chains that coil around each other to form a double helix.

These instructions from the DNA are stored inside each of the organism  cells, and distributed among 46 long structures called chromosomes.

The chromosomes in turn are made up of thousands of shorter segments of DNA, called genes.

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quizlrt There are two types of incentive based environmental policies Group of answer choices market-based systems and technology standards. technology standards and emissions standards. taxes/subsidy programs and technology standards. market-based systems and taxes/subsidy programs

Answers

Environmental policies are an essential tool for reducing the negative impacts of human activities on the environment. Incentive-based environmental policies are designed to encourage individuals and companies to take actions that are environmentally friendly. There are two types of incentive-based environmental policies, which are market-based systems and tax/subsidy programs.

Market-based systems are policies that create a market for environmentally friendly products or services. These systems allow companies to buy and sell pollution permits, which give them the right to emit a certain amount of pollutants. Companies that emit less than their allotted amount can sell their excess permits to companies that emit more than their allotted amount. This creates an incentive for companies to reduce their emissions, as they can make money by selling their excess permits.

Taxes/subsidy programs are policies that create financial incentives for individuals and companies to take environmentally friendly actions. Taxes can be imposed on activities that harm the environment, while subsidies can be given to activities that benefit the environment. For example, a tax could be imposed on companies that emit pollutants, while a subsidy could be given to companies that produce renewable energy.

Technology standards are policies that set minimum requirements for the technology used in certain industries. These standards can help to reduce the environmental impact of certain industries by requiring them to use more efficient and less polluting technologies. Emissions standards are similar to technology standards, but they set limits on the amount of pollutants that can be emitted by certain industries.

In conclusion, there are two types of incentive-based environmental policies, market-based systems and taxes/subsidy programs. Technology standards and emissions standards are also important policies that can help to reduce the negative impacts of human activities on the environment. By implementing these policies, we can create a cleaner and more sustainable world for future generations.

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what are some negatives and some positives of coastal development?

Answers

Answer:  Positive: Coastal areas help prevent erosion; filter pollutants; and provide food, shelter, breeding areas, and nursery grounds for a wide variety of organisms.

Negative: Added to this are impacts such as increased erosion due to coastal development, increased pollution, and increased boat traffic - all of which lead to further habitat loss and put increased pressure on marine species. ... Other coastal developments can also harm sensitive marine habitats and species.

Explanation:

Why do most red flowers get pollinated by birds?

Why do most red flowers get pollinated by birds?

Answers

Answer: red flowers are rich in nectar

Explanation:

Most bird-pollinated flowers are both red and rich in nectar. The traditional explanation for this association is that, since red is inconspicuous to bees, it evolved to prevent bees from depleting the nectar of bird-pollinated flowers without effecting pollination

What is climate change?

Answers

Answer:

Long-term modifications to the Earth's climate patterns and processes are referred to as "climate change." It is mostly brought on by a buildup in greenhouse gases, including carbon dioxide, which trap heat and warm the surface of the globe. Rising sea levels, more frequent and severe weather events, changes in precipitation patterns, and changes in ecosystems and wildlife habitats are just a few of the effects that this global warming may have. The burning of fossil fuels for energy, deforestation, and agricultural practices are some examples of human actions that contribute significantly to climate change, which is a worldwide problem. It is regarded as one of the biggest environmental challenges of our day, necessitating group effort to lessen its effects and prepare for its repercussions.

Explanation:

The differences in the forelimbs of the organisms below provide evidence to support the idea _____.

A: that these organisms evolved from the same ancestor
B: that all organisms need the same basic structure to survive
C: that they all share the same DNA
D: that these organisms have adapted in order to have the best chance of survival in different environments

Answers

Answer:

a

Explanation:

the answer should be that

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What organelle is responsible for storing water and other liquids in a plant cell?. PLEASE REPORT ALL OF MY QUESTIONS ILL EXPLAIN LATER DO IT NOW Select all the different methods that can be used to compute depreciation expenseStraight-line depreciationModified accelerated cost recovery system (MACRS)Curved-line depreciationAccelerated cost recovery system (ACRS) Who was the only African American to receive the Medal of Honor for service in World War 1?A.Freddie StowersB.Frank RobinsonC.Robert BlakeD.Henry Johnson How does Old Major describe the life of Animal Farm? Simplify LaTeX: \Large\frac{-4^{6} \cdot 4^{2}}{4^{4}} _____ is defining the importance of a given task. 1) Find the diameter of the circle (x - 4)2 + (y + 5)2 = 16. hich of the following sentences uses the active voice? select one: a. the stew was made by the chef using several ingredients. b. the chef used several ingredients to make the stew. c. several ingredients were used by the chef to make the stew. d. to make the stew, several ingredients were used. One year, the population of a city was 209,000. Several years later it was 244,530. Find the percent increase What is the voltage applied to a circuit increases, the current and the _____ also increase. Which part of the following sentence is a dependent clause?Until you finish your homework, you cannot go outside to play basketball. Use the oxygen binding curve to complete the information about data points at various sites in the graph. Match the words in the left column to the appropriate blanks in the sentences on the right. When the environment is a system with a partial pressure of oxygen at 10 mm Hg, the approximate fractional saturation of hemoglobin is between 0.0 to 0.2 The approximate fractional saturation of hemoglobin when near the lungs is 0.8 to 1.0 and when near the resting tissues is 0.4 to 0.6. The approximate partial pressure of oxygen is 20 to 40 mm~Hg when oxygen has bound 50% of the available hemoglobin binding sites, and is 40 to 60 mm~Hg when oxygen has bound 90% of the available hemoglobin binding sites. Solve each system by graphing 4x + y = 4 x + y = -2 What is the percent of change from 100 to 84? select the correct answer. the pacific plate is an oceanic tectonic plate. how did a hot spot and the pacific plate interact to form the hawaiian islands? a. both the hot spot and the plate remained stationary. b. both the hot spot and the plate continuously moved. c. the plate was stationary, while the hot spot constantly moved. d. salivary amylase and other enzymes in saliva by regina bailey, thoughtco, adapted by newsela staff on 10.17.19 word count 446 level max Suppose a city with population 300,000 has been growing at a rate of 6% per year. If this rate continues, find the population of this city in years. Suppose David is a busy CEO and has high levels of consumption (C) but relatively little leisure time (L). Mike, on the other hand, has a part-time job and therefore lots of leisure (L) with relatively little consumption (C).(5 marks) Construct an Edgeworth Box (measuring Consumption on vertical axis, with Mikes origin at the bottom left). Indicate an endowment bundle (W) that fits the description of this problem.(5 marks) David decides to hire a personal assistant, so that he can have more leisure time. Use indifference curves to illustrate a region in the graph where both David and Mike would benefit from Mike working for David as an assistant. Illustrate what an equilibrium would look like (E). Represent price ratio on your graph.(5 marks) After the employment, both Divid and Mike do not want to change their labor contract. Is the new equilibrium point efficient? Explain.(5 marks) Illustrate the contract curve in the box. Help me please and thank you