An RNA-based genome can result in an increased infection rate due to higher mutation rates and faster replication, but these advantages come with potential complications, such as the production of defective viral particles and damage to the host organism.
An RNA-based genome can result in an increased infection rate compared to a DNA virus due to several factors. Firstly, RNA viruses have a higher mutation rate because their RNA-dependent RNA polymerases lack proofreading capabilities, leading to a more diverse viral population. This genetic variability allows RNA viruses to adapt more rapidly to new host environments and evade the host immune system, contributing to an increased infection rate.
Secondly, RNA viruses often have a smaller genome size, which means they can reproduce more quickly within host cells. This faster replication rate can overwhelm the host's defenses, making it easier for the virus to spread and infect new cells.
However, there are potential complications to this infection strategy. The high mutation rate can also result in the emergence of defective viral particles that are unable to infect other cells, limiting the overall spread of the virus. Additionally, the rapid replication can cause significant damage to the host cell, leading to cell death and potential tissue damage, which may limit the virus's ability to propagate within the host.
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Biosemiotics and Evolution pp 45-64|Cite as Life Sciences and the Natural History of Signs: Can the Origin ofLife Processes Coincide with the Emergence of Semiosis
Yes, Origin ofLife Processes Coincide with the Emergence of Semiosis.
Life is defined as the characteristic that separates functional creatures from corpses. This difference is mostly based on traits displayed by biological systems throughout evolution. On this basis, it appears that being alive is dependent on the system's ability to remain invariant under the constraint of maintaining mutually dependent magnitudes such as shape, function, energy, and information through the organization of an internal hierarchy dynamically connected with the environment. The scientific explanation for this intricate connection lowers the living hierarchy to the sum of all constituent parts represented in isolation.
As a result, the ensuing functional teleonomies may be explained by the diachronic character of the underlying processes without having to account for the genesis of their emerging links. In this work, I will propose that the role of signals in the formation of novel forms and functions might be regarded as essential in channeling natural selection toward the establishment of certain evolutionary tendencies, rather than simply described.
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Exfoliating agents found in pedicure scrubs are made of sea sand, ground apricot kernels, pumice, quartz crystals, jojoba beads, and:
Exfoliating agents found in pedicure scrubs are made of sea sand, ground apricot kernels, pumice, quartz crystals, jojoba beads, and polypropylene beads.
What are Exfoliating agents?These are substances which are characterized by their gritty texture and are applied on the skin for the purpose of removal of old portions so as to enable new ones reemerging.This process in referred to as skin renewal and makes people look younger and healthy.
Polypropylene beads is referred to as a common thermoplastic resin and is also used as an exfoliating agent in pedicure scrubs due to its gritty nature and zero side effects when applied on the skin of individuals.
Other substances which are used as pedicure scrubs include sea sand, ground apricot kernels etc thereby making it the most appropriate choice.
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Use the model to explain how celiac disease interrupts the normal transportation of energy and other nutrients from the digestive system to the circulatory system.
Small intestine: It is an organ that helps in the digestion and absorption of nutrients like vitamins, minerals, carbohydrates, fats, proteins, and water from the ingested food.
The absorption of nutrients in the small intestine is done by villi which can be described as small finger-like projections on the interior surface of the small intestine. They increase the surface area for the absorption of nutrients from the food and transport it to other parts of the body where they can be consumed accordingly.
Celiac disease: It is a digestive disorder caused due to gluten in which villi of the small intestine in the inner lining of the small intestine are destroyed due to which the nutrients can not be absorbed properly from the food and thus the body faces a deficiency in nutrients and lacks energy as they cannot be extracted properly from food.
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How are bacteria and fungus penicillium similar?
The fact that both bacteria and the fungus Penicillium are cells with cell walls and membranes is one of the ways in which they are similar. The fact that both bacteria and the fungus penicillium are microorganisms is another commonality between them.
What are bacteria and fungus?Bacteria are common, largely free-living organisms that frequently only have one biological cell. They make up a significant portion of the prokaryotic microbial kingdom. Bacteria, which are typically a few micrometers long and were among the first life forms to appear on Earth, are found in the majority of its habitats.
Any member of the eukaryotic group of organisms, which also includes the more well-known mushrooms and microbes like yeast and mold, is referred to as a fungus.
The Penicillium and bacteria have a relationship that is The secretion known as penicillin, which is produced by Penicillium fungus, is exceedingly hazardous to bacteria. This discovery served as the inspiration for penicillin, the first real antibiotic.
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In plants, the reproductive structure that produces pollen and seeds is the __________.
Group of answer choices
phloem
xylem
gametophyte
flower
Describe the pressures in the atria and ventricles that would cause the opening of the AV valves. Pressures in the atria and ventricles would be equal. Pressure in the ventricles would be greater than in the atria. Pressure in the atria would be greater than the pressure in the ventricles.
The pressures in the atria and ventricles that would cause the AV valves to open. This is when the pressure in the atria would be greater than the pressure in the ventricles.
What does pressure in the atria cause?The pressure drops below 120 mmHg as the ventricles relax, causing the semilunar valves to close. As the pressure continues to fall, the atrial pressure exceeds that of the ventricles, and the atrioventricular valves open. Meanwhile the blood is being pumped around the body.
With this information, we can conclude that the pressure in the atria would be greater than the pressure in the ventricles.
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The earliest evidence of ancestral ____ are found in middle pleistocene deposits in kenya.
Answer: chimpanzees
Explanation:
The earliest evidence of ancestral hominin are found in the middle pleistocene deposits in kenya, Africa. Pleistocene showed to have the earliest occurrence of about 2 million years ago.
What are evidences of ancestry?
Fossils, anatomy, embryos, and DNA sequences provides the line of evidence about the common ancestry of today's organisms. It provides evidence of more closely related organisms having more characteristics in common. DNA sequences underlies the similarities and differences in the fossils, anatomy, and embryos of human population.
The hominin fossil record is found in the Pleistocene is increasingly well documented. One species for which there is substantial new information is Homo erectus which are found in the deposits of Kenya, Africa.
Homo erectus is an extinct species of archaic human race from the middle Pleistocene, with its earliest occurrence about 2 million years ago.
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Select the correct answer.
Which of the following is the correct explanation for linked genes?
A.
genes located on the same chromosome and inherited together
B.
genes located on different chromosomes but inherited together
C.
genes located on mutated chromosomes that are inherited together
Answer:
A. genes located on the same chromosome and inherited together
Explanation:
linked genes are genes that are close together and end up being inherited together due to their closeness even after chromosomal crossover
Which wave properly varies as the pitch of a sound wave varies A frequently b wavelength C speed D amplitude
Its A frequently
explantation: the higher the frequency wave the higher the pitch of the sound
In a common reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, where does the signal go next?
In a reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron. The answer is motor neurons.
What is the reflex arc?
The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts.
In general terms,
1) A stimulus of varying nature reaches the body.
2) The peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-.
3) The CNS processes the information and sends another signal as a response to the stimulus.
Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.
The neurons involved in the mechanism are:
• Afferent or sensorial neurons
• Interneurons
• Efferent or motor neurons
Mode of Action:
Ascending branchThe stimulus reaches the body and is received by the specialized sensory receptors.
Afferent neurons, placed in the dermis and epidermis, receive this information from receptors, react and send it to the central nervous system as nerve impulses.
Descending branchInterneurons in the CNS, process the information and send a motor response.
Efferent neurons carry the response from the CNS to the effector organs, which might be either a muscle or a gland.
Finally, the target tissue responds to the stimulus as a contraction -muscle-,or as hormones release -gland-.
A motor neuron is formed by a cellular body, dendrites (cytoplasmic extensions that receive stimuli from other cells), and a long axon that is capable of conducting the electrochemical signals.
The axon brunches out into several extensions when it approaches the muscle.
At the end of each brunch, the axon is inserted in the muscle fiber surface, composing neuromuscular join.
This is the last part of the NS involved in the process before the muscle contracts.
After a sensory nerve signal is processed by interneurons in the integration center, the signal goes to the motor neuron, and from there to the effector.
The corrct answer is motorneuron.
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Why is bone made up of calcium salts and not other salts, for example, iron salts?
Bone made up of calcium salts and not other salts, for example, iron salts because the presence of iron salts would strengthen bone but make it very heavy, requiring much larger muscles to move it. Calcium and collagen work together to make bones strong and flexible. Calcium salts provide rigidity to bones and teeth. Without mineral deposits in the bone, the organic extracellular matrix would be week .
About 99% of the body's calcium is stored in bones, and the remaining 1% is found in blood, muscle, and other tissues.70% of bone is made up of bone mineral called hydroxyapatite. Before the extracellular matrix is calcified, the tissue is called osteoid tissue.
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Conventional genetic analyses of rrna sequences is not possible for prions because:_______
Conventional genetic analyses of rRNA sequence is not possible for prions because they don't contain nucleic acid.Prions do not contain genetic material such as - DNA and RNA.
The unique traits and genetic material information are encoded with the conformation structure and modification of protein.Prions which are responsible for transmissible sponginess encephalitis is mammals which all known prion disease affect the neural tissues.
There are 253 amino acids exist in multiple conformations and isoform which is found in healthy organisms, most extensively studied proteins. Prions are not destroy easily and remains intact in the presence of radiation , disinfectant and extreme heat.
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Is it possible for a producer to be on another level of enery pyramid besides the bottom?
Answer:
no,it will always stay at the bottom because it is the supplier of energy for consumers. It is where the food chain process starts.
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Select the correct answer. betty drew the life cycle of a butterfly for a science exhibition. the life cycle showed the various stages of growth before the egg turns into a butterfly. what type of model did betty use? illustration of a monarch butterfly life cycle. eggs, larva, chrysalis, and adult. a. hypothetical b. conceptual c. mathematical d. physical
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5. Describe how the frog's circulatory and digestive systems are physically connected.
Answer:
The circulatory system transports blood throughout the body through the veins. The circulatory system works with the respiratory system because it transports oxygen through the body as well. It works with the digestive system because it transports waste so it can be disposed.
Explanation:
joe
Answer:
I think one way its connected is through the liver? cause what the frog eats (digestive system) goes through the liver at some point to process, break down and create nutrients. And the liver is also connected to the circulatory system because it processes blood?
Explanation:
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How would the sensory homunculus of the giraffe be different than a human's?
Homunculi of various morphologies can be seen in several species as a result of their divergent evolutionary histories. So there are differences in the sensory homunculus between giraffes and humans.
The structural properties of sensory homunculus
The sensory homunculus, which is located in the cerebral cortex, is a topographic representation of the sensory acuity of the body.Typically, this topograph contains body components depicted along the parietal lobe's postcentral gyrus surface. The sensory homunculus' topology matches the body's opposite side. This region corresponds to the sensory region of the lower extremities and genitalia, starting from the medial aspect of the postcentral gyrus. The superior to superolateral portions of the postcentral gyrus, which run farther laterally along the gyrus, correspond to the neck, shoulder, and torso. This region corresponds to the upper extremities and hand and is located on the lateral side of the postcentral gyrus. The inferolateral region of the postcentral gyrus corresponds to the facial and bulbar structures. Surprisingly, the face is the part of the sensory homunculus that occupies the most significant space.To know more about sensory homunculus
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With respect to a hypothetical rabies investigation conducted among veterinary workers (Dr. Spot, 2003), researchers found that rabies was almost always fatal. This finding refers to:
This finding refers to Virulence of Rabies Virus (RV).
What is virulence?Virulence is a pathogen's or microorganism's ability to cause damage to a host. Factors that are produced by a microorganism and evoke disease are called virulence factors. Examples are toxins, surface coats that inhibit phagocytosis.Rabies is caused by a lyssavirus .The major factors that determine the virulence of RV are virus uptake, cell-to-cell spread, rate of virus replication and the expression of the RV glycoprotein (G).Human rabies is 99% fatal. It can be prevented by vaccinating pets, avoiding contact with wildlife and seeking medical care as soon as possible in case of being bitten by animals.Learn about pathogenicity and virulence here:
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• explain how the nervous system controls muscle tension
Your nerves somehow allow this signal to pass through and, like magic, it causes that large muscle to contract. If it's okay, we'll concentrate on it as the question directly refers to the muscular contraction. We move ahead to the motor neuron, where the brain's action potential has already reached the muscle. Motor units, which are made up of an upper and a lower motor neuron, are used to control muscles. The top motor neurons, or the neuron that transmits signals from the brain, are represented by the tracts above. After connecting to lower motor neurons, upper motor neurons link to the muscle. The basic structure of your muscles is fibers inside fibers inside fibers. Sarcomeres, the smallest unit, are made up of sections that are separated by Z-lines. We have two filaments, actin and myosin, between the Z-lines. The M-line is where Myosin is connected, while Actin is a long, thin filament attached to the Z-line. The actin will be pulled by the myosin, which will cause the Z-lines to constrict inward toward the M-line. The bigger structures will follow if many of these tiny fibers do this at once, triggering the contraction of the entire muscle. The Sliding Filament Model of contraction is used to describe this.
A single Actin and Myosin pair appears quite similar if we zoom in on it. Myosin and actin do not contact when your muscles are at rest, yet they have a strong attraction for one another (they really want to touch). If not for two proteins (tropomyosin and troponin) linked to the Actin filament, they would touch. As we are still awaiting a signal, we slightly zoom out.
An action potential is sent by the lower motor neuron, which causes Acetylcholine to be released into the synapses. This results in an inflow of sodium, which changes the voltage and spreads the signal.
The action potential is no longer in the neuron but rather within the muscle. The Sarcolemma is struck by the action potential as it travels through the muscle cells.
The Sarcolemma has tubes that penetrate the cell deeply (T-Tubules). The Action Potential is sent at the Sarcomeres via these tubes.
Calcium is continually being pumped out of the cell by the Sarcoplasmic Reticulum, which houses the sarcomeres (these pumps use ATP as energy). Additionally, it has voltage-gated calcium channels that are still closed that line it.
The Voltage Gated Calcium channels open when the T-Tubules produce an action potential, allowing calcium to flood the cell.
The two proteins that surround the actin are now activated by calcium. When calcium attaches to troponin, a shape shift occurs (as proteins do when they bind). The active strands are revealed as the troponin pulls tropomyosin in its direction.
Now that the Actin sites are revealed, the Myosin is free to bind to them. However, myosin, which used some ATP and broke it down into ADP and phosphate, is the only protein that can actually do this. This myosin, which has been "charged," extends. It remains put, clinging to ADP+Phosphate like a loaded weapon.
The myosin unleashes its energy and rushes toward the exposed Actin now that it is primed and prepared. Once more, it alters form by dragging the acting and moving it inside.As soon as the bullet was shot, all of the energy necessary to divide ATP into ADP and phosphate was used up, and the split chemicals were released back into the cell (the release occurs because myosin changed it shape and in this state no longer has a strong affinity for them). The mitochondria will reuse them at this location and transform them back into ATP.Myosin does have a high affinity for ATP in this condition, which causes ATP to attach to it once again. Myosin is released from Actin by this binding, which results in another shape shift. Myosin is therefore brought back to its primed and prepared condition. Actin may be drawn in little further if it fires once more.As a result, the two Z-lines are pulled toward the centre by the Myosin, and the sarcomere contracts.
Since the Sarcoplasmic Reticulum's calcium pumps are actively pumping calcium out, calcium ultimately dissociates from Troponin. Actin is rendered unavailable to myosin as a result of the protection being reset. The fun is gone now because Myosin can no longer link to the actin, and when an action potential occurs, the cycle restarts.
And that’s how a signal from the nervous system, an action potential, can cause a muscle to contract. Isn’t nature cool?
A large area undergoes the same amount of metamorphism. All rock reach the same metamorphism grade. However, after the metamorphism some rocks are marble and some rocks are slate. Why?
The only explanation in this situation is that the parent rocks of the marble and slate were different. This indicates that the region once held both shale and limestone before metamorphism.
In reference to rocks, it denotes those that have undergone metamorphism—rocks that may have started as sedimentary, igneous, or another type of metamorphic rock but has since undergone "recrystallization" and taken on an entirely new form—under new temperature and pressure conditions.
For instance, when limestone is heated and compressed, it changes into marble, a more coarsely crystalline and occasionally banded rock.
When shale, a clay-rich, soft rock, is compressed, slate, a tougher rock, is created.
The alterations are frequently even more remarkable, resulting in the formation of new minerals, including garnet, mica, and tourmaline (as seen in schist).
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Which action is characteristic of the hormone vasopressin?
ADH increases arteriole constriction and tubular permeability to water
Vasopressin, also referred to as antidiuretic hormone (ADH), is a hormone secreted by the posterior pituitary gland. Arteriole constriction and tubular permeability to water are both increased by ADH. Calcitonin and parathyroid hormone levels in the blood regulate calcium equilibrium (PTH). the hormone that aids in blood vessel constriction and aids the kidneys in regulating the body's salt and water balance. This aids in regulating both blood pressure and urine production.
Sensors (baroreceptors) in the heart and big blood vessels can identify a drop in blood volume or low blood pressure that happens after dehydration or a hemorrhage. These encourage the secretion of anti-diuretic hormones.
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A plant is 15 inches tall and grows at a rate of 0. 5 inches per week. Write a function h that models the height of the plant, in inches, as it grows per week,
Answer:
h(x)=0.5x+15.
Explanation:
Given that the first differences remain constant, this function is linear. Thus, we can use y=mx+b.
'b' in this case is 15 inches, as that is the original height of the plant.
The slope (m) would be 0.5, such that time is the independent variable and height is the dependent variable (which should always be the case).
Using this information, we can create a function to model height:
h(x)=0.5x+15, where x represents each week.
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Marfan syndrome is caused by a defect in FBN1 gene located on chromosome 15. The gene normally encodes the fibrilllin-1, which is important for the elasticity and appropriate growth of connective tissue. The defect in the gene that causes Marfan syndrome results in a decrease in the amount of functional fibrillin-1 produced. One defective copy of the gene is sufficient to cause Marfan syndrome.
Marfan syndrome is an autosomal dominant condition.
What is Marfan Syndrome?Connective tissue, or the fibers that support and anchor your organs and other body components, is harmed by Marfan syndrome, a genetic disorder. Most frequently, the heart, eyes, blood arteries, and skeleton are impacted by Marfan syndrome.
It happens because one healthy copy of the FBN1 gene is not sufficient to sustain the normal development of connective tissue.
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The structural commonality of the biceps brachii and the rectus abdominis is that they are __________.
The structural commonality of the biceps brachii and the rectus abdominis is that they are parallel muscles whose fibers run along through the long axis of the body.
Together with the pyramidalis muscle, the rectus abdominis is a member of the anterior abdominal muscles. However, when considering the functional architecture, these two muscles, together with the three lateral abdominal muscles—the external oblique, internal oblique, and transversus abdominis make up the anterolateral abdominal wall.
The biceps brachii muscle, also known as the "biceps," is a big, thick arm muscle with two heads. The supraglenoid tubercle, located above the glenoid cavity of the scapula, is the location of the long head. It is extra synovial while being in the intracapsular area.
At the humeral head, the long biceps tendon curves sharply before continuing on in the bicipital groove (intertubercular sulcus). Ligaments in the capsular region (also known as the biceps pulley) hold this pivotal point in place.
Short head: Arises at the coracoid process of the scapula, where it partially fuses with the coracobrachialis origin tendon.
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A 5-year-old child is at the pediatric clinic for a well-child visit. which symptom alerts the health care provider that this child might have acute lymphoblastic leukemia (all)?
Bone marrow aspiration symptom alerts the health care provider that this child might have acute lymphoblastic leukemia (all)
Acute lymphocytic leukemia (ALL) is a kind of blood and bone marrow malignancy. Blood cells are generated in the spongy tissue inside the bones. Acute lymphocytic leukemia gets its name from the fact that it advances quickly and produces immature blood cells rather than mature ones.Acute lymphoblastic leukemia in children is more frequent than other cancers, however it is curable in a significant portion of cases. Adult survival rates are lower, although they are rising. ALL has a 5-year relative survival rate of 68.8%. 90 percent of children and 30 to 40 percent of adults are included in the statistics, respectively.
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The body in an erect posture, facing forward, arms at the side, palms facing forward, legs apart, feet pointing forward describes what term?
Anatomical position, or standard anatomical position, refers to the positioning of the body when it is standing upright and facing forward with each arm hanging on either side of the body, and the palms facing forward. The legs are parallel, with feet flat on the floor and facing forward.
The benefit of the palms facing forward is that it makes the radius, and ulna, the bones of the forearm run parallel to each other from the elbow to the wrist.
The term is used in medicine and related fields when referring to the position of body parts in relation to each other. There are four main anatomical positions which are:- supine, prone, right lateral recumbent, and left lateral recumbent. Each position is used in different medical circumstances.
The prone is defined as "lying flat with the face downward" and supine as "lying on the back."
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Cytotoxic t cells are able to recognize infected body cells because _______________________.
Cytotoxic t-cells are able to recognize infected body cells because the infected cells display foreign antigens.
What do cytotoxic killer T cells do?The helper T cell and the cytotoxic T cell are the two main subtypes of T cells. Helper T cells, as their names imply, "assist" other immune system cells, whereas cytotoxic T cells "kill" virally-infected cells and tumors. The TCR cannot directly bind antigen, unlike an antibody.
Killer T cells are also known as "cytotoxic" or "cytolytic" cells because they have unique molecular weapons that allow them to attack and kill other cells that are showing targets they are familiar with, such as a virus-infected cell or even a malignant cell. The processed cancer cell antigen, which is solely presented by MHC-class I, must be recognized by cytotoxic T lymphocytes. Helper T cells binding to a processed antigen on the same dendritic cell as the MHC-class II presenting a processed cancer cell antigen enhances cytotoxic T-cell complete activation.
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Internal respiration refers to the exchange of gases:
Question 1 options:
Between the atmosphere and the lungs
Between the lungs and the heart
Between blood cells and body cells (excluding alveoli)
Between blood cells and the alveoli
Within body cells
Which of the situations is an example of the crowding-out effect on investment as it pertains to macroeconomics?
The crowding out effect is an economic theory arguing that rising public sector spending drives down or even eliminates private sector spending. Crowding out of investment is defined as a situation when increased interest rates lead to a reduction in private investment spending such that it dampens the initial increase of total investment spending is called crowding out effect. The impact of crowding out can be increased government borrowing and spending causing a reduction in private spending. Because government borrowing increases the cost of private loans and uses up capital that may have been deployed elsewhere, businesses and individuals don't borrow or spend as much money.
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Answer: Jack wants to borrow money to create a cowboy-themed inflatable bounce house for kids called "Wild Wild West." However, the government is running a deficit which has increased interest rates so much that Jack can no longer afford to borrow the money.
What conclusion can be made if the cell margins of a biopsy are clear when observed under a microscope
The cancer has not invaded other tissues is the conclusion which can be made if the cell margins of a biopsy are clear when observed under a microscope in this scenario.
What is Biopsy?
This medical procedure involves taking sample of cells or tissues from parts of the body and observing it under a microscope.
The microscope function is to enlarge the objects which are positioned on the objective lens thereby making it possible for them to be seen more clearly and accurately.
If the cell margins of a biopsy are clear when observed under a microscope, it means the cancer hasn't invaded other parts while in a scenario where the cell margins are crowded then it depicts the presence of cancerous cells thereby making it the most appropriate choice.
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question 4: an atom with 7 protons, 6 neutrons, and 7 electrons, has an atomic mass of blank amu. (Enter a whole number)