How do scientists use comparative embryology for evidence of evolution? (Use the photo provided to explain. SPAM ANSWERS = INSTANT REPORT.)

Structure Function Label Carries impulses to the spinal cord when a muscle contraction pulls on a tendon It transmits nerve impulses from sensory receptors to the spinal cord sensory neuron Proprioceptors located in a tendon.

They are receptors that send nerve impulses to the CNS when the muscle is stretched Muscle spindles. A portionn of the tendon that joins to the muscle fibers The part of the muscle that contracts Muscle fibers Contractile fibers that pull on the tendon when the muscle contracts They are the connective tissues that attach muscles to bones Tendon. When a muscle contracts, a tendon reflex is initiated. The tendon reflex is caused by the Golgi tendon organ, which is a sensory receptor that is activated by changes in the tension of the muscle. This receptor is found in tendons that connect muscles to bones. A tendon reflex can help to prevent muscle injuries by inhibiting excessive muscle contractions. The tendon reflex is initiated when a muscle contracts, causing tension in the muscle fibers. The tension causes the Golgi tendon organ to be activated, which sends signals to the spinal cord. The spinal cord then sends signals to the muscles, causing them to relax. This reflex helps to prevent damage to the muscle or tendon by inhibiting excessive muscle contractions.

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The incorrect statement regarding the vitreous body is that it consists of a thin, watery fluid. In fact, the vitreous body is a clear, gelatinous substance that fills the posterior segment of the eye.

It supports the posterior surface of the lens and holds the retina against the choroid, providing the eye with its shape and helping to maintain its structural integrity. It is not a thin, watery fluid and instead has a gel-like consistency due to the presence of collagen fibers and hyaluronic acid. While the vitreous body is not involved in transmitting light, it does play an important role in the optical properties of the eye.

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Yellow Ostrilopes had a higher chance of surviving in areas where there were predators because they blended in. A trait of yellow was adaptability.

The weather has changed to be dry. In this population, the distribution of traits changed as generations progressed in this environment, changing the large diversity of water-storage traits to solely Level 9 water-storage traits, which are adaptive traits.

A characteristic is a feature of the entire or a specific part of an organism's developmental pattern. Hence, an adaptive trait is a feature of the developmental pattern that aids in the survival and/or reproduction of its bearer in a particular series of conditions. It is up to the person to adopt the adaptive trait.

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During photosynthesis, the oxygen comes from water molecules (H2O).

Photosynthesis is the process by which plants produce their own food. It is the process of converting carbon dioxide and water into organic molecules like glucose (a type of sugar) and oxygen. This process takes place in chloroplasts, which are found in the leaves of plants.The green pigment called chlorophyll absorbs light energy, and this energy is then used to power the process of photosynthesis.

During photosynthesis, the oxygen comes from water molecules (H2O). The water molecules are broken down by the process of photolysis, which means that they are split apart by light energy. This process releases oxygen (O2) and hydrogen ions (H+). The oxygen is then released into the atmosphere, while the hydrogen ions are used to create ATP (adenosine triphosphate), which is the energy currency of the cell.

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Yes, if you wanted to mate two chocolate labs, you would need to do a Punnett square. This is because black coat color is the dominant trait for labrador retrievers, meaning there is a higher probability of offspring with a black coat color.

Doing a Punnett square will allow you to see the exact probability of each type of coat color being produced in the offspring. Yes, if you wanted to mate two chocolate labs, you would need to do a Punnett square.

The reason is that a chocolate lab can have two recessive genes for the color of the coat, meaning that both parents have to pass on the recessive gene for their offspring to have a chocolate coat color. The question mentions that black coat color is dominant over chocolate coat color in Labrador Retrievers.
This is done by drawing a square with two rows and two columns. The names of the genes in each row and column are written at the top of the square. In this case, B is used to represent the dominant black color gene, and b is used to represent the recessive chocolate color gene.

To fill the square, we place one parent's genes on the top of the square and the other parent's genes on the left side of the square. We fill in the boxes with the different possible gene combinations that can occur in the offspring. After that, we count the number of boxes that contain the recessive chocolate color gene to determine the probability of a chocolate coat color in the offspring.

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The expected effect of 5-HT is that it decreases LGI excitability in the subordinate animal after two weeks.

The LGI (lateral giant interneuron) is a crayfish's sensory neuron that responds to touch or threatening stimuli. The LGI has a role in regulating the crayfish's movement and behavior. Lateral giant interneurons (LGIs) are found in a variety of crustaceans, including crayfish, shrimp, and lobsters.

5-HT (serotonin) is a monoamine neurotransmitter that is found in the central nervous system (CNS) and in blood platelets. It is converted from the amino acid tryptophan in the body. Serotonin's main function is to regulate mood, behavior, and cognition. It also aids in the regulation of a variety of physiological activities, including appetite, sexual desire, and the sleep-wake cycle.

According to research, 5-HT (serotonin) decreases LGI excitability in the subordinate animal after two weeks. As a result, if you pair two naive crayfish together and allow them to establish a dominance hierarchy over two weeks so that one crayfish is clearly dominant and the other is subordinate, the LGI excitability of the subordinate animal decreases as a result of the presence of 5-HT or serotonin.

As a result, option A is correct. 5-HT decreases LGI excitability in the subordinate animal after two weeks. The other options are incorrect because they do not show the same effect of 5-HT on LGI.

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The electrons become excited. In plants, the aforementioned chlorophyll pigments are found in the chloroplast thylakoids, where the aforementioned "light" reactions take place.

The electrons in pigment molecules are energised by light energy and are then transferred to an electron transport chain in the thylakoid membrane. The subsequent steps in the electron transport chain subsequently reduce each electron's energy level and use it to create ATP and NADPH. While this is happening, each chlorophyll molecule takes an electron from a water molecule and replaces the one it lost; in essence, this splits the water molecule to create oxygen.

Chlorophyll and other light-sensitive pigments are found in photosynthetic cells, which are able to absorb sun energy. Such cells may transform solar energy into energy-dense organic molecules like glucose in the presence of carbon dioxide.

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The correct order for waste products to pass through the urinary system to be excreted is: kidneys, renal artery, ureters, urinary bladder, and urethra.

The kidneys function to filter metabolic waste products from the bloodstream and remove them from the body as urine.

The ureters are muscular tubes that carry urine from the kidneys to the urinary bladder. The urinary bladder is a muscular sac that temporarily stores urine before it is released from the body through the urethra.

The urethra is a tube that carries urine from the bladder out of the body. The urinary system is responsible for eliminating waste products and maintaining fluid balance in the body.

The statement "The adrenal glands lie directly above the kidneys" is false. The adrenal glands are located above the kidneys, but not directly.

The statement "The kidneys lie within the abdominal cavity" is true. The kidneys are located within the abdominal cavity, protected by a layer of fat and other tissues.

The statement "The kidneys are protected by a layer of fat" is true. The kidneys are protected by a layer of fat, as well as other tissues.

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In eukaryotic species, the initiation phase of translation differs in two ways from the process in bacteria. First, instead of a ribosomal-binding sequence, eukaryotic mRNAs have a adenosine cap at their 5' end. Secondly, in eukaryotes, the location of start codons is more variable.

Translation is the process by which information in RNA is translated into a protein sequence in the form of a polypeptide chain. The amino acid sequence of the polypeptide is determined by the sequence of codons in mRNA. In eukaryotic organisms, the initiation stage of translation differs from that of bacteria in two ways. First, instead of a ribosomal-binding sequence, eukaryotic mRNAs have an adenosine cap at their 5' end. Secondly, in eukaryotes, the position of start codons is more varied.

The 5' end of all eukaryotic messenger RNAs is capped with a special type of nucleotide known as an "adenosine cap." The structure of the 5' cap is a 7-methylguanosine residue (m7G) linked in a triphosphate bridge to the 5'-terminal nucleotide (the first nucleotide of the transcript, at the 5'-end). The adenosine cap has the following benefits:It protects the mRNA from being broken down quickly. It facilitates the mRNA's nuclear export. It enables the mRNA to bind to the ribosome.

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A chemical or physical agent in the environment that causes a mutation is called a mutagen.

Mutagens are agents that can alter the DNA sequence of an organism, leading to changes in genetic information that can have harmful effects on the individual or its offspring.

Examples of chemical mutagens include certain chemicals such as benzene, formaldehyde, and certain pesticides, which can cause mutations in DNA by disrupting DNA replication or repair processes. Physical mutagens include ionizing radiation, such as X-rays and gamma rays, and ultraviolet radiation from the sun, which can directly damage DNA molecules by causing breaks or changes in the nucleotide sequence.

Exposure to mutagens can increase the risk of developing genetic diseases or cancer, so it is important to identify and reduce exposure to mutagens in the environment. This can be done through various measures, including using protective equipment in workplaces where mutagens are present, regulating the use of chemicals and radiation in industry, and implementing policies to reduce exposure to mutagens in the environment.

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Four of the following are important ecological services provided by forests except that it "releases atmospheric carbon." The correct answer is Option C.

Ecological services are the benefits that humans get from the natural world. They are the things that humans depend on that would be impossible or incredibly costly to recreate on our own. Some examples of ecological services include water filtration, pollination, and waste decomposition.

Ecological services are essential to human life and economic growth. These services are incredibly valuable, and humans depend on them for survival. Without ecological services, humans would not be able to survive. Forests are a vital part of the ecological services as they provide water filtration, wildlife habitats, soil erosion control, and also influence local and regional climates.The correct option among the following is Releases atmospheric carbon.

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The correct answer is d. Perm is likely to have a colder air temperature than Quetta, despite being farther from the equator.

This is because temperature is not only determined by latitude but also by a range of factors such as elevation, proximity to large bodies of water, prevailing winds, and atmospheric pressure systems. In the case of Perm, it is located in a region with a continental climate, which is characterized by cold winters and hot summers.

The sun's energy is transferred from the sun directly to the surface, and then from the surface to the air. As the distance from the equator increases, the angle of the sun's rays gets lower, which means that less energy is transferred to the air, and therefore, the air temperature is colder.

Quetta, on the other hand, is located in a semi-arid region with a desert climate, which is characterized by hot days and cool nights. Therefore, the temperature in both locations is influenced by a complex interplay of various factors, and simply comparing their latitude is not sufficient to determine which location has a colder air temperature.

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Probable Question would be:

quetta is closer to the equator than perm. which location has a colder air temperature and why?

a. Quetta, because less energy is transferred from the sun directly to the air.

b. Quetta, because less energy is transferred from the sun directly to the surface, and then from the surface to the air.

c. Perm, because less energy is transferred from the sun directly to the air.

d. Perm, because less energy is transferred from the sun directly to the surface, and then from the surface to the air.

Euchromatin and heterochromatin are two types of chromatin found in the nucleus of a cell. Found in nucleus - Both types of chromatin are found in the nucleus of the cell. Regulatory functions - Both types of chromatin play a role in regulating gene expression.

Euchromatin:
• Loosely packed - Euchromatin is loosely packed and can easily be transcribed into mRNA, allowing for gene expression.
• Genetically active - Euchromatin is more likely to be active and have higher levels of gene expression.
• Variation - Euchromatin is more likely to contain more variation in genetic content.
Heterochromatin:
• Densely packed - Heterochromatin is more densely packed than euchromatin and is not readily transcribed.
• Genetically inactive - Heterochromatin is less likely to be active and have lower levels of gene expression.
• Repetitive sequences - Heterochromatin is more likely to contain repetitive DNA sequences.
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The statement that is NOT a characteristic of the DNA double helix is: "The two strands are held together by covalent bonds between bases" option C.

The two strands of DNA are held together by hydrogen bonds between complementary base pairs. Specifically, adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C). The hydrogen bonds form between the nitrogenous bases of the two strands, and these bonds are relatively weak compared to covalent bonds.

Covalent bonds, on the other hand, involve the sharing of electrons between atoms and are much stronger than hydrogen bonds. Covalent bonds can be found within each individual strand of DNA, such as the covalent bonds between the sugar and phosphate groups that form the backbone of the DNA molecule.

Therefore, option C ("The two strands are held together by covalent bonds between bases") is not a characteristic of the DNA double helix.

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Hydra, a type of Cnidarian, have equal survival rates through life because they are equally fit at all stages. Hydra is an example of an organism with a Type I survivorship curve.

Hydra, a type of cnidarian, have equal survival rates through life because they are equally fit at all stages.

The survivorship curve refers to the graph that represents the number of individuals in a population that survive to a certain age. Type I, Type II, and Type III are the three main survivorship curves.

Type I survivorship curves show high early-life survival rates, low mortality rates during middle age, and high mortality rates among older adults.

In Type II survivorship curves, the probability of death is the same at all ages.

A declining mortality rate is observed in Type III survivorship curves. Fish, amphibians, and other species are examples of Type III survivorship curves.

Therefore, Hydra is an example of an organism with a type I survivorship curve.

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We can construct a genetic map to determine the order of the genes on the chromosome:

n--(7.9)--o--(7.4)--p

The distance between n and p is 15.7, which is the sum of the distances between n and o and between o and p:

Distance between n and o + Distance between o and p = 15.7

7.9 + 7.4 = 15.3

Therefore, the remaining distance between p and n must be 0.4 units. Since we don't have any information about the recombination frequency between p and n, we can't determine their exact order.

In summary, the likely order of the genes on the chromosome is n-o-p, with a distance of 7.9 units between n and o, a distance of 7.4 units between o and p, and an unknown distance of 0.4 units between p and n.

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The dispersal vector illustrated in the scenario is **unintentional introduction through human activity**. The student introduced non-native flowering water plants into the frog pond while conducting the experiment. The plants were purchased from an aquarium and were not native to the area where the experiment was being conducted.

The implications of this scenario are that the non-native plants have established themselves in the frog pond and are now growing there. This can have negative impacts on the ecosystem, as the non-native plants could outcompete native plants for resources, alter the physical and chemical properties of the water, and impact the food web. In addition, the non-native plants could potentially spread to other water bodies, further disrupting ecosystems and potentially leading to the loss of native species.

It is important to note that unintentional introduction through human activity is a major driver of global biodiversity loss. It is crucial for individuals to be aware of the potential impacts of their actions, and take steps to prevent the introduction of non-native species into ecosystems. This can include properly disposing of plants and animals, avoiding the release of pets into the wild, and being cautious when introducing new species into an environment.

The sequence of events that takes place in the reproduction of a flowering plant is option C) Meiosis → Pollination → Nuclear fusion → Formation of embryo and endosperm.

Meiosis is the process in which a diploid cell divides into four haploid cells (gametes) that have half the number of chromosomes. Pollination is the process by which the male gametes of a flower reach the female gametes of another flower. It takes place either by the wind or with the help of animals such as bees.

Nuclear fusion is the process of combining haploid gametes to form a diploid zygote. The formation of embryo and endosperm happens when the zygote begins to divide and differentiate. It results in the formation of a new plant that has stored food in the form of an endosperm.

Option A is incorrect because ovulation is a process that takes place in animals, not in plants.

Option B is incorrect because the order of the processes is incorrect.

Option D is incorrect because the process of fertilization comes before the growth of the pollen tube.

Option E is incorrect because mitosis is not a part of the process of reproduction in flowering plants.

Therefore, the correct answer is option (C).

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Answer:

reproduction

Explanation:

just cause

The yellow-orange coloration of leaves in the fall is caused by the presence of carotenoid pigments.

Carotenoid pigments are responsible for the yellow-orange coloration of leaves in the fall. Carotenoids are lipid-soluble plant pigments that aid in photosynthesis and offer photoprotection against excessive sunlight, and other environmental stressors. They absorb light energy in a complementary manner to chlorophyll, extending the range of wavelengths that can be absorbed and increasing the efficiency of light use.

The carotenoid pigments in deciduous leaves play a significant role in autumn leaf coloration. In autumn, leaves cease photosynthesis and break down chlorophyll, exposing the yellow and orange carotenoids that were previously masked by the green chlorophyll. As a result, deciduous trees and shrubs display spectacular yellow, orange, and gold autumn colors before the leaves fall to the ground.

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The average population density of sparrows at this site is 4 sparrows per hectare. This can be calculated by the formula of population density.

The average population density of swamp sparrows in a 20-hectare section of Mount Meadow is 4 per hectare can be calculated by the formula of population density:

Population density = Total population ÷ Total area

Total population of swamp sparrows = 80

Total area = 20 hectares

Population density = ?

Substitute the values in the formula, Population density = Total population ÷ Total area

Population density = 80 ÷ 20

Population density = 4

The average population density of swamp sparrows in a 20 hectare section of Mount Meadow is 4 per hectare.

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Frederick Griffith discovered that boiling the S strain of streptococcus pneumonia did not kill injected mice with this pathogen.

He hypothesized that some form of "transforming principle" was released from the heat-killed S strain cells that caused the live R strain cells to change into a virulent form. He explained this change in the bacteria as a transformation, where the harmless R strain was transformed into a deadly form by the transforming principle released from the dead S strain cells.

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Plants use yellow and orange accessory pigments called carotenoids in photosynthesis, alongside chlorophyll, the major pigment.

Carotenoids are found in the chloroplast and serve a few roles in the photosynthesis process. These accessory pigments absorb light in wavelengths that chlorophyll is not able to absorb. This increases the range of colors of light that can be used for photosynthesis, resulting in increased efficiency of the process. Additionally, carotenoids protect the chlorophyll from damage due to excess light, as they absorb light energy which would otherwise damage the chlorophyll. Carotenoids can also be converted into vitamin A in some organisms, which is important for many physiological processes.

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Newborns should be between 5 pounds, 8 ounces (2,500 grams) and 8 pounds, 13 ounces (4,000 grams) in weight.

A newborn must adapt to the fundamental changes that have happened in his or her life during the newborn period, which begins at delivery and lasts until the child is between 4 and 12 weeks old. During this period, most infants will slumber a lot and not be very active.

Two months old is an incredible milestone for you both. Your infant and you are both gradually waking up from the recent newborn daze. They are no longer an infant wrapped up in a blanket. They are starting to open their eyes, extend their legs, and grin the cutest little infant smiles.

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Peptidoglycan is present in the cell walls of: option (D) which is "eubacteria"

Peptidoglycan is a molecule that makes up the cell walls of most bacteria. This makes it an excellent target for the development of antibiotics that specifically target bacteria but not other organisms since no other organisms have peptidoglycan in their cell walls.

Peptidoglycan is a polysaccharide and peptide complex that makes up the majority of bacterial cell walls. In the cell walls of gram-negative bacteria, it forms a thin, protective layer around the plasma membrane, while in the cell walls of gram-positive bacteria, it makes up a much thicker, more extensive layer.

It provides the bacteria with structural support and protects it from osmotic pressure changes that would otherwise cause the cell to burst or shrivel up. The presence of peptidoglycan in bacteria cell walls provides the basis for Gram staining, a technique used to differentiate bacterial species. Peptidoglycan is not present in the cell walls of any other type of organism except eubacteria.

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Answer:

I believe the answer is

Explanation:

Terminator or stop codon

You have a small gene that you wish replicated by PCR. You add radioactively labeled nucleotides to the PCR thermocycler. After 2 replication cycles, the percentage of DNA single strands that are radioactively labeled is 75%.

Polymerase chain reaction (PCR) is a method used to make many copies of a specific DNA sequence. PCR uses cycles of denaturation, annealing, and extension to amplify DNA. PCR is an in vitro (in a test tube or lab setting) method of DNA replication.To replicate the gene using PCR, radioactively labeled nucleotides can be added to the reaction.

Radioactively labeled nucleotides will be incorporated into the newly synthesized DNA strands during the extension phase of PCR. After two cycles of PCR, there will be four DNA strands present. Out of these four strands, three will contain at least one radioactively labeled nucleotide. Therefore, the percentage of DNA single strands that are radioactively labeled after two cycles of PCR is 75%.

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Answer: View answer in explanation below.

Explanation: Sweetness and spiciness are both sensations that we perceive through taste, but they are different in terms of their chemical composition, sensory experience, and neural processing. Here are some ways in which sweetness and spiciness differ:

Chemical composition: Sweetness is primarily detected by taste receptors that are sensitive to sugar molecules, such as glucose and fructose. These receptors send signals to the brain that are perceived as sweet. In contrast, spiciness is detected by pain receptors, called nociceptors, that are sensitive to chemical compounds called capsaicin (found in chili peppers) and piperine (found in black pepper). These compounds cause a burning sensation that is distinct from the sweetness of sugar molecules.

Sensory experience: Sweetness is generally perceived as pleasant and is associated with foods such as fruits, desserts, and candy. The taste of sweetness is often described as sugary, syrupy, or honey-like. In contrast, spiciness is often perceived as intense and may cause discomfort or pain. The taste of spiciness is often described as hot, pungent, or peppery.

Neural processing: Sweetness and spiciness are processed differently in the brain. Sweetness is detected by taste receptors on the tongue, which send signals to the brain via the gustatory pathway. Spiciness, on the other hand, is detected by pain receptors that are not specific to taste. These receptors send signals to the brain via the trigeminal pathway, which is responsible for processing sensations such as touch, pressure, and pain.

In summary, sweetness and spiciness are both taste sensations, but they differ in their chemical composition, sensory experience, and neural processing. Sweetness is detected by taste receptors that are specific to sugar molecules, while spiciness is detected by pain receptors that respond to capsaicin and piperine. The taste of sweetness is generally perceived as pleasant, while the taste of spiciness can be intense and may cause discomfort or pain.

The following statements that are true are: Bilayers do not form spontaneously, the exchange of lipids between layers is faster than the movement of lipids within a single layer, and The two layers of the bilayer tend not to mix.

In the cell membrane, lateral diffusion happens when lipids move along the surface of the membrane from one end to the other, while transverse diffusion, also known as flip-flop movement, occurs when a lipid molecule from one layer of the membrane flips into the opposing layer of the membrane.

While transverse diffusion is slower than lateral diffusion due to the need for the hydrophobic tail of the lipid to move through the hydrophilic interior of the membrane, which necessitates energy input in the form of heat or chemical energy, the exchange of lipids between the layers is faster than the movement of lipids within a single layer since this only requires the lipid molecules to diffuse along the surface of the membrane.

On the other hand, since the two layers of the bilayer consist of different lipid species that have different hydrophobic properties, they tend not to mix, which is why the cell membrane is a bilayer that is also selectively permeable.

A more negative value of ΔGrxn indicates that the process is more spontaneous and thus has a lower energy barrier, implying that the ΔGrxn for lateral diffusion is more negative than the ΔGrxn for transverse diffusion.

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At resting membrane potential, the concentration of sodium is higher outside the neuron and the concentration of potassium is higher inside the neuron. Option C, "outside; inside" is the answer.

The resting membrane potential refers to the electrical charge difference that is present between the interior of a cell and its surrounding environment at rest. Sodium and potassium ions are significant in generating this membrane potential.

The concentration of sodium is greater outside the neuron, whereas the concentration of potassium is greater inside the neuron. This is owing to the presence of the sodium-potassium pump, which maintains this concentration difference, forcing sodium ions out of the neuron and potassium ions inside it.

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