The observations that led Mendel to conclude that traits were inherited as discrete particles from each parent are, that trait were inherited as dominant and recessive, which led him to propose the conclusion that they were particles inherited from each parent.
Mendel did studies on inherited genes that lead him to accept some traits were dominant and recessive. Through this, he found that some genes had ratios of being generated, relating to the maternal and paternal traits they have.
This observation states that traits are inherited as dominant and recessive, and not all blended, which made him to propose the conclusion that they were particles inherited from each parent.
As per Mendelian inheritance, all the traits which are present in an offspring are determined by the specific which exist in alternate forms called as alleles.
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What is water warmed by
Answer: Depends based on the location but usually by a heat source such as sun or in the kitchen with a stove.
Explanation:
in general, atp is generated in catabolic pathways and expended in anabolic pathways. t/f
This statement is generally true.ATP (adenosine triphosphate) is an energy carrier molecule that is used by cells to power many different cellular processes. In general, ATP is generated during catabolic pathways, which break down larger molecules into smaller ones, releasing energy in the process.
For example, cellular respiration, which occurs in the mitochondria, is a catabolic pathway that produces ATP from the breakdown of glucose. On the other hand, ATP is expended during anabolic pathways, which build larger molecules from smaller ones and generally require energy input. For example, protein synthesis is an anabolic pathway that requires ATP to link amino acids together into a protein chain. Of course, there are many exceptions to this general pattern, and ATP is involved in a wide range of cellular processes, both catabolic and anabolic. However, in general, ATP is produced in catabolic pathways and used in anabolic pathways.
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in humans the allele for albinism is recessive to the allele for normal skin pigmentation. if two heterozygotes have children, what is the chance that a child will have normal skin pigment? what is the chance that a child will be albino? normal pigment: albino: a. if the child is normal, what is the chance that it is a carrier (heterozygous) for the albino allele? (careful!)
The chance that a child will have normal skin pigmentation is 3/4. The chance that a child will be albino is 1/4. If the child is normal, the chance that it is a carrier (heterozygous) for the albinism allele is 1/2.
Albinism is caused by a recessive allele, meaning that a person must inherit two copies of the allele in order to display the phenotype. If two heterozygous parents (one dominant allele and one recessive allele) have children, there is a 3/4 chance that the child will inherit the dominant allele and have normal skin pigmentation, and a 1/4 chance that the child will inherit the recessive allele and be albino. If the child has normal skin pigmentation, it is equally likely to have inherited either one dominant allele and one recessive allele or two dominant alleles. Therefore, the chance that the child is a carrier (heterozygous) for the albinism allele is 1/2.
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T/F
Serial dilutions can be used to estimate the total number of bacterial cells in a solution, including living and dead cells.
False. Serial dilutions can not be used to estimate the total number of bacterial cells in a solution, including living and dead cells.
A serial dilution is an incremental dilution of a substance in solution. The dilution factor is usually constant at each step, resulting in a logarithmic geometric series of concentrations. Ten-fold serial dilutions are 1M, 0.1M, 0.01M, 0.001M, etc.
A sample is serially diluted by diluting it in a succession of standard quantities of sterile diluent, either distilled water or 0.9% saline. A small measured amount of each dilution is then used to make a series of casts or spreader plates. In microbiology, serial dilution (logarithmic dilution) is used to reduce the concentration of bacteria to that required for a particular test procedure or to a concentration that is easy to count when plated on agar plates.
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3. According to the Law of Superposition, in undisturbed, horizontal, sedimentary rock layers, the oldest layer is at the bottom. Each higher layer is younger than the rocks below it. Why is it important that the rock layers be undisturbed? SC.7.E.6.3
A. If the rock layers are disturbed, the absolute age of the rocks will change
B. If the rock layers are disturbed, certain layers may be missing or relocated
C. If the rock layers are disturbed, the Law of Superposition is proven wrong
Please explain why you chose this
Answer: law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence. On occasion, however, deformation may have caused the rocks of the crust to tilt, perhaps to the point of overturning them. Moreover, if erosion has blurred the record by removing substantial portions of the deformed sedimentary rock, it may not be at all clear which edge of a given layer is the original top and which is the original bottom.
law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.
7. Doctors often count the amount of lymphocytes in a person's blood to see if the person has certain illnesses. Why would this be a useful test? (4 points)
Because they vary in some illnesses, they can be used in conjunction with other cell counts to identify the illness.
further explanationOne of the sorts of immunological cells is the lymphocyte, which is primarily found in the lymph of the lymphatic system. Three different cell kinds make them up.
Natural-Killer (NK) Cells, T-Cells, and B-CellsB and T cells serve as detecting cells. Where they identify and flag "non-self cells" or "infected self cells" as potential threats to the body and start the process of removing them right away.
On the other hand, NK cells will immediately identify and destroy "non-self" or "infected self" cells.
Most often, these cells will react to tumor cells or viral infections. Their blood levels will consequently rise more frequently in these circumstances.
This implies that if a patient has a fever or a sore throat, the doctor can determine whether a viral or bacterial infection is to blame by looking at how much the lymphocyte count rises in the CBC test.
It should be noted, though, that it is not the "only" test employed.
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What are the 5 layers of the skin in order?
stratum basale, stratum spinosum, stratum granulosums, tratum lucidum, stratum corneum in this order are the five layers that make up our skin.
what is skin?Protection, regulation, and sensation are the three main functions of skin. It is the outer layer of tissue that covers the body of a vertebrate animal and is often soft and flexible.
Arthropod exoskeletons, for instance, differ from other animal coverings in terms of their developmental origin, structure, and chemical composition. The Latin word cutis, from which the English word cutaneous is derived, meaning "of the skin." Mammals' skin, an element of the integumentary system that guards the underlying muscles, bones, ligaments, and internal organs, is composed of multiple layers of ectodermal tissue. The skin types of birds, reptiles, and amphibians are all distinctive. Skin has a significant role in the development, maintenance, and function of extraskeletal apparatus, particularly the horns of bovids (including cutaneous and subcutaneous tissues).
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the temperature of a substance is not a measure of its heat content, but a measure of the average kinetic energy of this molecules. Tue or False
true is the right response. A substance or body's temperature refers to the amount of heat it contains and can be determined using a variety of scales, including the Kelvin scale and the Celcius scale.
The average kinetic energy of molecules, or the energy created by a substance's molecules as a result of their movement and the generation of heat, is also equivalent to temperature. This holds true for a variety of substances, but ideal gases especially. This suggests that it is accurate to say that a substance's average kinetic energy is measured by temperature.
Kinetic energy: A gas's average particle temperature and kinetic energy are inversely correlated. As the gas warms, the particles must move more quickly because their mass is constant.
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You examine a tissue sample under the microscope and discover that the tissue appears to be striated muscle. What can be concluded from this observation?
Select one:
a. The sample is voluntary muscle
b. The sample can generate its own action-potentials
c. More information is needed to answer the question
d. The sample is cardiac muscle
e. The sample could regulate movement in the digestive system
Answer:
You have a fluorescently tagged antibody that binds to actin.
Explanation:
I took the test and got this one right ^^
if an egg were weighed halfway between being laid and hatching, how would you expect that weight to compare to the weight of the newly laid egg?
If an egg were weighed halfway between being laid and hatching, it would be expected to weigh more than the weight of the newly laid egg.
This is because, during the developmental process, the egg undergoes significant changes, and various structures develop inside the egg, leading to an increase hatching in the overall weight of the egg. As the egg develops, the yolk and albumen serve as a nutrient source for the developing embryo, and they increase in size and weight. Additionally, the developing embryo also adds to the overall weight of the egg. The eggshell also thickens and hardens, which contributes to the increase in weight. Therefore, by the time the egg reaches hatching the halfway point of development, it is expected to weigh more than the newly laid egg.
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movement of water down its concentration gradient are called?
Osmosis is a sort of simple diffusion inside which water molecules move from areas with greater water to areas with a lower water concentration through a selectively porous membrane.
Why is gradient significant?an inclined layer; grade; ramp; the amount of inclination or the speed of ascension or descent in a highway, train, etc. Physics. the rate of fluctuation of a dependent variable, such as pressure or temperature with regards to the distance towards the direction of motion movement.
What is gradient, exactly?Gradient is a differential operator used in mathematics to transform a three-dimensional vector-valued functional into a vector whose three elements are the partial derivative of the signal with respect to its three independent variables. Gradient is represented by the symbol.
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Muscle cell adaptations that enable the cell carry out its function?
Answer:
Muscle cells, also known as muscle fibers, undergo several adaptations that enable them to carry out their functions, which include contractions, generating force, and producing movement. Some of these adaptations include:
1. Hypertrophy: an increase in the size of the muscle fibers, which allows for a greater ability to generate force.
2. Increased number of myofibrils: the contractile units within muscle fibers, which increases the overall contractile ability of the muscle.
3. Increased levels of sarcoplasmic and myofibrillar proteins: these proteins are involved in the contraction process, and their increased levels lead to improved muscle function.
4. Increased levels of enzymes and energy-rich molecules: these help to support the high metabolic demands of muscle contraction.
5. Increased number of mitochondria: the powerhouses of the cell, which help to supply energy to the muscle fibers.
6. Increased capillarization: the development of a greater network of blood vessels, which helps to supply the muscle with oxygen and nutrients, and to remove waste products.
These adaptations enable muscle fibers to carry out their functions effectively, and can be achieved through various forms of exercise and physical activity.
What made Went's experiment different from all previous experiments on plant tropism?
A. determine the chemical properties and structure of hormones that affect plant growth.
B. demonstrated that plants respond to indirect light by growing toward the light.
C. isolating a plant hormone from one plant and using it to change growth patterns in different plants.
D. showed that the coleoptile parts of plants are critical in responding to light signals.
Option C. Isolating a plant hormone from one plant and using it to change growth patterns in different plants made Went's experiment different from all previous experiments on plant tropism.
Went's experiment, also known as the Avena curvature experiment, was the first to demonstrate the existence of a plant hormone that regulates the growth of plants. In this experiment, Went isolated a substance from the tip of oat coleoptiles (the sheath protecting the embryonic shoot) that caused the coleoptiles to bend towards light. Went called this substance "auxin," which is now known to be the plant hormone responsible for regulating cell elongation and growth in response to various environmental stimuli. Previous experiments on plant tropism had observed plant growth responses to various stimuli, such as light and gravity, but had not identified a specific hormone or chemical that caused these responses. Went's experiment was the first to identify and isolate a specific plant hormone, and to demonstrate that this hormone could be used to induce similar growth responses in other plants. This discovery had a significant impact on the study of plant growth and development, and led to the development of new techniques for manipulating plant growth using synthetic auxins.
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the human gut is home to about how many microorganisms?
The human gut is a home to approximately about 30 to 400 trillion microorganisms. These microorganisms include bacteria, viruses, fungi, and other microbes.
This collection of microorganisms is commonly referred to as the gut microbiome, and it is believed to play an important role in human health and disease. The composition of the gut microbiome can vary widely from person to person, and it can be influenced by factors such as diet, genetics, and environment. The gut microbiome is a complex ecosystem of microorganisms that inhabit the digestive tract. The majority of these microorganisms are bacteria, and there are estimated to be more than 1,000 different species of bacteria in the gut. Other microorganisms found in the gut microbiome include viruses, fungi, protozoa, and archaea. The gut microbiome is an important part of the human body, and it is involved in many physiological processes, including digestion, immune function, and metabolism. The gut microbiome can also have an impact on overall health, and disruptions to the gut microbiome have been linked to a variety of conditions, including obesity, type 2 diabetes, inflammatory bowel disease, and even neurological disorders such as Parkinson's disease and depression.
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which of these is an example of negative feedback? A. Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold. B. calcium decreases. C. the parathyroid glands sense.
Option A is correct. Examples of negative feedback: Too cold causes the blood vessels in the skin to constrict and skeletal muscles to contract.
What is Body Negative Feedback?A negative feedback loop, also called an inhibition loop, allows the body to regulate itself. This process begins when the body system performs better, resulting in higher levels of certain proteins and hormones. This stops (neutralizes or reverses) future production by the system.
What is Negative Feedback in Homeostasis?Negative feedback mechanisms, better known as negative feedback homeostasis, are pathways triggered by performance deviations, causing performance changes in the opposite direction to the initial deviation.
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What organelle controls what comes in and out of the nucleus?
Nuclear pores, which are small channels that run across the nuclear envelope, allow substances to enter and exit the nucleus. Each pore is lined by a group of proteins known as the nuclear pore complex, which regulates which molecules can enter and exit.
The nucleus contains our DNA, which contains all of our genetic information. DNA is found on chromosomes, which are nucleoplasmic objects. A cell's nucleus contains 46 chromosomes that are divided into 23 pairs. A nuclear membrane surrounds the nucleus and controls what enters and exits it. Messenger RNAs are loaded onto the RNA during transcription and splicing and bind to the proteins. These proteins emit nuclear export signals that are detected by export receptors, which then direct RNA out of nuclear pore complexes.
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What is happening when the enzymes are produced? Water is the trigger for the embryo to begin the enzymatic breakdown of the starchy endosperm.
The biological molecules known as enzymes function as catalysts, accelerating chemical reactions without being consumed themselves.
After the end product is produced, what happens to the enzyme?Because they are not reactants, enzymes are not depleted during a reaction. An enzyme can be employed for other reactions after it has catalysed a reaction and been released from its binding to a substrate. This indicates that the ratio of enzyme to substrate molecules does not have to be 1:1 for every reaction.
How is an enzyme made?Microorganisms are the ones that make enzymes. It is possible to alter these microbes to create enzymes with much improved production and purity characteristics.
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Why do we only see neanderthal input in non-african genomes?
Neanderthals were an ancient human species that lived in Eurasia for hundreds of thousands of years.
They interbred with modern humans when our ancestors migrated out of Africa and into Eurasia. As a result of this interbreeding, some modern humans have small amounts of Neanderthal DNA in their genomes. However, this Neanderthal genetic input is only found in non-African populations.
The reason for this is that modern humans evolved in Africa, and it is thought that the first humans to leave Africa did so around 70,000 years ago. These humans interbred with Neanderthals as they migrated through the Middle East, but then continued on to settle in other parts of the world. Since the Neanderthals lived only in Eurasia, the only modern humans who have Neanderthal DNA are those whose ancestors interbred with Neanderthals in Eurasia.
Additionally, the small amount of Neanderthal DNA in non-African populations suggests that the interbreeding events between Neanderthals and modern humans were relatively infrequent. This could be due to a number of factors, including differences in behavior, habitat, and population size.
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image that a scientist decides to investigate what happens when two different genetic strains of mice are bred together. the resulting offspring mice have severely underdeveloped basal ganglia. what behavioral symptoms do you think these mice will display?
Both of the two characteristics being investigated in mice are controlled by a single gene, and the researcher is aware that both of these genes are found on the same chromosome. The mice's pups do not always inherit the two traits simultaneously from the genetic strains.
A genetic strains variation or subtype of an organism (e.g., a virus, bacterium or fungus). A "flu strain," for example, is a specific biological variety of the influenza virus. The different surface protein isoforms of these influenza strains allow for easy differentiation between them. New viral strains may naturally arise when two or more viruses infect the same cell as a result of mutation or genetic component swapping. These events are referred to as "antigenic drift" and "antigenic shift". Metagenomic techniques can also be used to identify between microbial strains based on their genetic makeup, which can increase resolution within species.
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in prokaryotes, transcription and translation can happen simultaneously. this never happens in eukaryotes. why?
In prokaryotes, transcription and translation can happen simultaneously. this never happens in eukaryote because the Prokaryotes do not have membrane-enclosed nuclei, which list the reason for the processes of transcription, translation, and mRNA degradation can all occur simultaneously, whereas not in eukaryotes.
also, in prokaryotes the process of transcription and translation can occur at the same time as also the both of them takes place at cytoplasm
we can see that in prokaryotic transcription that it can cover down the more genes and also produce polycistronic mRNAs and can specify more than 1 protein also.
RNA polymerase enzyme is used by prokaryotes transcription.
The synthesis of mRNA is generally at the promoter sequence present on the DNA template
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which structural feature of the seventh cervical vertebra (c7) allows it to be easily palpated through the skin of the shoulder blades and inferior to the neck?
The cervical spine consists of seven vertebrae that extend from the base of the skull to the shoulders' highest point. These vertebrae, the smallest in the entire spinal column, support the head.
Shield the spinal cord, give the neck structure, and allow for head and neck movements. The "normal" cervical vertebrae, which range in size from C3 to C7, have a similar structure and function. Round forms make up the vertebral bodies. The C3-C7 bones are smaller than the cervical vertebrae when compared to the lumbar and thoracic (mid- and low-back) vertebrae. In comparison to other vertebrae, the spinous process of C7 is longer. Your hand will feel this bone poking through the skin at the back of your neck.
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Which kind of laboratory is independent and analyzes samples from other health care facilities?
Reference laboratories are independent labs that examine samples from various healthcare facilities.
An autonomous reference laboratory is what?An independent laboratory is a location that is licensed to offer diagnostic laboratory services under the Clinical Development Act (CLIA) of 1988 but is not a hospital or clinic.
Which organization offers laboratories proficiency testing of unidentified samples?All non-waived diagnostic laboratories are required to take proficiency testing, according to the Centers for Medicare & Medicaid Services (CMS) (PT). A CMS-approved PT providers program sends unidentified samples to a laboratory for examination. The two primary methods of phlebotomy are capillary and venipuncture.
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in cellular respiration; which molecules are broken down to form oxygen and carbon dioxide?
In cellular respiration, oxygen is not broken down to form carbon dioxide and water.
What is cellular respiration?Cellular respiration is the process by which cells convert nutrients into usable energy in the form of ATP (adenosine triphosphate). It involves a series of metabolic reactions that occur within the mitochondria of cells. The process can be divided into three stages: glycolysis, the citric acid cycle (also known as the Krebs cycle), and oxidative phosphorylation.
During glycolysis, glucose is broken down into pyruvate, which then enters the citric acid cycle. In the citric acid cycle, pyruvate is further broken down, and carbon dioxide is produced. Finally, oxidative phosphorylation uses electron transport chains to generate ATP. Cellular respiration is essential for the survival and functioning of all living organisms.
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Which of the following statements is true regarding glycine? Glycine is an asymmetric amino acid. Glycine is a large, polar amino acid.
The correct way to put it is that glycine makes the peptide backbone more flexible.
The amino acid glycine is non-polar, symmetric, non-essential, and proteinogenic. The glycine molecule is symmetrical because it contains two hydrogen groups. Glycine is not absolutely necessary because the living body can produce it on its own.
The structure known as a peptide is made up of several amino acids connected by peptide bonds.
A peptide is smaller than a protein in size. Nitrogen, carbon, and the carboxyl carbon make up the backbone of a peptide molecule. The formation of the backbone does not involve the side chains of amino acids.
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Complete Question -
Which of the statements is true regarding glycine?
R=H
Select all that apply
Glycine is a polar amino acid.
Glycine is a large amino acid.
Glycine is an asymmetric amino acid.
Glycine increases the flexibility of the peptide backbone.
The side chain is small so it tucks in
Glycine is kinky (causes a bend in protein backbone) because the side chain binds to the central carbon AND the amino o group.
Glycine is special because it contains a -SH group important in protein folding.
the thin space between the parietal and visceral layers of the serous pericardium is the ______ cavity.
The thin space between the parietal and visceral layers of the serous pericardium is the pericardial cavity.
The pericardium is a double-layered sac that surrounds and protects the heart. The two layers of the pericardium are the parietal pericardium, which is the outer layer, and the visceral pericardium, which is the inner layer. The space between these two layers is called the pericardial cavity. The pericardial cavity is a thin, fluid-filled space that contains a small amount of serous fluid. This fluid acts as a lubricant and reduces friction between the parietal and visceral layers of the pericardium, allowing the heart to move smoothly within the pericardial sac during its contractions and relaxation. The pericardial cavity is an important part of the cardiovascular system and plays a crucial role in protecting and facilitating the movement of the heart. Any accumulation of excess fluid in the pericardial cavity, such as in pericardial effusion, can interfere with the normal functioning of the heart and require medical intervention.
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represents a metabolic process involving the regulation of lactose metabolism by E. coli bacteria. Lactose is utilized for energy by E coll when glucose is not present. Allolactose is an isomer of lactose that is in the environment of these bacteria when lactose is present. The CAP site prevents the binding of RNA polymerase when glucose is present in the environment. The lacZ, lacY, and lac A genes code for proteins needed for lactose metabolism.
The scientific claim that is consistent with the information provided in the figure 1 is allolactose acts as an inducer that binds to the operator, allowing E. coli to metabolize lactose. Therefore, the correct option is D.
What is lactose metabolism?It is also referred to as lactose degradation, where breakdown of alpha lactose to constituent sugars take place, thereby producing energy.
The figure shows that the lac operon is regulated by a repressor protein and an activator protein (CAP) in response to the presence of lactose and glucose in the environment. When lactose is present, it is converted to allolactose which binds to the repressor protein and prevents it from binding to the operator, allowing RNA polymerase to transcribe the genes involved in lactose metabolism.
This process is known as induction, and it enables E. coli to use lactose as an energy source when glucose is not available. Therefore, the correct option is D.
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The question is incomplete, but most probably the complete question is,
Figure 1 represents a metabolic process involving the regulation of lactose metabolism by E. coli bacteria. Lactose is utilized for energy by E coll when glucose is not present. Allolactose is an isomer of lactose that is in the environment of these bacteria when lactose is present. The CAP site prevents the binding of RNA polymerase when glucose is present in the environment. The lacZ, lacY, and lac A genes code for proteins needed for lactose metabolism.
Which is the scientific claim that is consistent with the information provided in the figure 1.
a. The presence of excess lactose blocks the functioning of RNA polymerase in this operon.
b. When bound to the operator, the repressor protein prevents lactose metabolism in E. coli.
c. The binding of the repressor protein to the operator enables E. coli to metabolize lactose.
d. Allolactose acts as an inducer that binds to the operator, allowing E. coli to metabolize lactose.
who first captured sound using a bristle and a coated cylinder?
By using the vibrations of a bristle on a piece of soot-covered paper, Leon Scott's phonautograph, developed in 1857, had shown how ambient sound waves could be traced as a visual image.
What is captured sound using a bristle?When objects vibrate, pressure waves are created that our ears can detect as sound. These waves can be recorded when they move a microphone's membrane, and they can be reproduced by the amplified vibrations of a speaker's membrane.
Sound waves in the air are captured by recording equipment, which then transform them into electrical signals or digital data that can be saved on physical objects like records, CDs, and computer hard drives.
To replicate the original sound, playback equipment turns the recording process on its side.
Therefore, Édouard-Léon Scott de Martinvillefirst captured sound using a bristle and a coated cylinder.
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As the earth , heavier elements such as and nickel moved to the center of the earth. This was the beginning of the layers of the earth with the outer layer being covering the magma
Answer:
That is correct. The heavier elements such as iron and nickel sank to the center of the earth due to its higher density and gravity, forming the core. This created layers of the earth with the outer layer, or crust, covering the magma.
Explanation:
The primers play three roles in a PCR reaction. Select all of the answers that are correct.
They denature the double-stranded DNA
They serve as the templates onto which the new complementary strands are made.
They determine what region of the genome will get amplified.
They determine the size of the resulting PCR product.
They provide a double-stranded region for Taq to initiate synthesis
They are the monomers that are polymerized by Taq to make the new complementary strands
Role of primers in the PCR reaction: They determine the size of the resulting PCR product and provide the double-stranded region for Taq to initiate synthesis.
What are the three steps of PCR amplification?PCR is based on the three simple steps required for a DNA synthesis reaction: (1) Denaturation of the template to single strands. (2) Annealing of primers to each original strand for neustrand synthesis. (3) Extension of a new DNA strand from the primer.
Why is 3 end of the primer important?The presence of G and C bases (GC clamp) at 3′ end of the primer helps promote correct binding at the 3′ end due to stronger hydrogen bonding of G and C bases. GC coupling contributes significantly to stability like Increased Melting Temperature - Increases temperature of primer and template, resulting in more binding than AT binding.
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What are the main differences between domain bacteria and archaea?
The key distinction between archaea and normal bacteria is that the cell wall of an archaeon is made up of a special kind of chemical called pseudo murein, which is not present in bacteria.
In contrast to bacteria, archaea can survive in more friendly conditions like salt lakes and hot springs. More so than bacteria, archaea rely on anaerobic respiration and fermentation to exist. They also have a different form of metabolism. Finally, compared to bacteria, archaea have a different set of genetic material that is all their own. The Bacteria and Archaea domains have very different cell walls in terms of composition. peptidoglycan, a mixture of proteins and sugars, makes up the cell walls of bacteria, whereas polysaccharides make up the cell walls of archaea (sugars).
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