The law of superposition states that in an undisturbed sequence of rock layers, the oldest layer is at the bottom and the youngest layer is at the top. This principle can be used to determine the relative ages of rock layers.
The law of superposition is based on the observation that sedimentary rocks are formed in horizontal layers over time.
As new layers of sediment are deposited, they accumulate on top of previously deposited layers. Therefore, the sequence of rock layers represents a chronological record of Earth's geological history.
To apply the law of superposition:
1. Identify a sequence of undisturbed sedimentary rock layers.
2. Observe the vertical position of each layer relative to the others.
3. Assign relative ages to the layers, with the bottommost layer being the oldest and each successive layer above it being younger.
For example, consider a cliff face with four distinct rock layers (A, B, C, and D) stacked in the following order from bottom to top:
- Layer D (bottommost)
- Layer C
- Layer B
- Layer A (topmost)
Using the law of superposition, we can determine that Layer D is the oldest, followed by Layer C, then Layer B, and finally Layer A, which is the youngest
This method does not provide an absolute age for the rocks, but it does establish a relative chronological sequence.
To obtain absolute ages, geologists often use radiometric dating techniques on rocks that contain radioactive isotopes. By combining relative dating principles like the law of superposition with absolute dating methods, scientists can construct detailed geological timelines.
Mosquitoes that carry disease-causing organisms from person to person are called _________________.
Answer:
vector
Explanation:
a vector is an organism that transmits a pathogen from organism to organism.
What is the flexible connective tissue shown in blus?
Shoulder Joint
tendon
bong
O cartilage
O muscle
Plssssss i need the answer
Answer:
cartilage
Explanation:
The flexible connective tissue shown in blue in the shoulder joint is cartilage, which provides support and cushioning between bones.
Explanation:The flexible connective tissue in the shoulder joint is primarily cartilage. Cartilage is a tough and resilient tissue that covers the ends of bones where they meet in a joint, providing a smooth surface for low-friction movement. In the shoulder, it is found in the glenoid cavity of the scapula (shoulder blade) and the head of the humerus (upper arm bone).
This articular cartilage naturally reduces friction and cushions the joint during various movements like arm rotation and lifting. While cartilage plays a crucial role in the shoulder joint's flexibility and function, it can be susceptible to wear and tear, leading to conditions like osteoarthritis.
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Balance the equation H2+O2=H2O.
Answer:
the answer is written in the picture.
Explanation:
Answer:
2H2 + O2 = 2H2O
Explanation:
To balance the equation, you must place coefficients behind the element and have equal amounts of atoms on both sides. In this case, to balance the equation, it would read:
2H2 + O2 = 2H2O
It earth is like a greenhouse carbon gases in the atmosphere are like the
A: planets
B:glass
C:sun
D:ground
Can anyone help me with any of the questions
2. a. Approximately 0.0208 L of the 1.20 M AgNO3 solution is needed to precipitate all the chloride ions.
b. Approximately 2.70 g of AgCl should precipitate.
To find out how much AgNO3 solution is needed to precipitate all the chloride ions, we need to determine the amount of chloride ions present in the HCl solution and then use stoichiometry to find the amount of AgNO3 required.
Part a: Volume of AgNO3 solution needed
1. Calculate moles of Cl⁻ ions in the HCl solution:
Given:
- Volume of HCl solution = 250.0 mL = 0.250 L
- Concentration of HCl solution = 0.100 M
[tex]\[ \text{Moles of } \text{Cl⁻} = \text{Concentration} \times \text{Volume} \][/tex]
[tex]\[ \text{Moles of } \text{Cl⁻} = 0.100 \, \text{mol/L} \times 0.250 \, \text{L} = 0.025 \, \text{mol} \][/tex]
2. Use stoichiometry to find the moles of AgNO3 required:
From the balanced chemical equation:
[tex]\[ \text{AgNO3(aq)} + \text{HCl(aq)} \rightarrow \text{AgCl(s)} + \text{HNO3(aq)} \][/tex]
It's a 1:1 molar ratio between AgCl and Cl⁻ ions. So, moles of AgNO3 required = moles of Cl⁻ ions.
[tex]\[ \text{Moles of AgNO3} = 0.025 \, \text{mol} \][/tex]
3. Calculate the volume of 1.20 M AgNO3 solution:
Given:
- Concentration of AgNO3 solution = 1.20 M
[tex]\[ \text{Moles of AgNO3} = \text{Concentration} \times \text{Volume} \][/tex]
[tex]\[ 0.025 \, \text{mol} = 1.20 \, \text{mol/L} \times \text{Volume} \][/tex]
[tex]\[ \text{Volume} = \frac{0.025 \, \text{mol}}{1.20 \, \text{mol/L}} \][/tex]
[tex]\[ \text{Volume} ≈ 0.0208 \, \text{L} \][/tex]
Part b: Mass of AgCl precipitated
1. Calculate moles of AgCl precipitated:
From the stoichiometry, the moles of AgCl precipitated will be equal to the moles of Cl⁻ ions, which is 0.025 mol.
2. Calculate the mass of AgCl precipitated:
Given:
- Molar mass of AgCl = [tex]\( 107.87 \, \text{g/mol} \) (atomic masses: Ag = \( 107.87 \, \text{g/mol} \), Cl = \( 35.45 \, \text{g/mol} \))[/tex]
[tex]\[ \text{Mass of AgCl} = \text{Moles of AgCl} \times \text{Molar mass of AgCl} \][/tex]
[tex]\[ \text{Mass of AgCl} = 0.025 \, \text{mol} \times 107.87 \, \text{g/mol} \][/tex]
[tex]\[ \text{Mass of AgCl} \approx 2.70 \, \text{g} \][/tex]
Identify whether each compound will ionize or dissociate in water. Sodium sulfate (Na2SO4) Ammonium phosphate ((NH4)3PO4) Sulfuric acid (H2SO4) Potassium iodide (KI)
Answer:
Sodium Sulfate: Dissociate
Ammonium Phosphate: Dissociate
Sulfuric Acid: Ionize
Potassium Iodide: Dissociate
Perchloric Acid: Ionize
Cesium Chloride: Dissociate
Nitric Acid: Ionize
Sodium Sulfate: Dissociate
Ammonium Phosphate: Dissociate
Sulfuric Acid: Ionize
Potassium Iodide: Dissociate
Perchloric Acid: Ionize
Cesium Chloride: Dissociate
Nitric Acid: Ionize
What do ionize and dissociate suggest?Ionization is described because of the method wherein new charged debris is produced. Dissociation is described as the technique wherein a charged particle is separated from the prevailing compound. that is an irreversible system. this is a reversible process.
What's the distinction between dissolving and ionizing?Dissolution is any procedure that consequences in stages (whether it's liquid-liquid for acetic acid or stable-liquid for sodium chloride) creating an unmarried segment. Ionic compounds dissociate to try this, however many compounds (glucose, acetone, and many others.) can have interaction sufficient with water enough to dissolve without ionizing.
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Newton's Third Law of Motion is shown by a child jumping rope. Describe what action and
reaction are occuring How does this help explain the third law?
Answer:
See explanation below for answer.
Explanation:
Newton's third law of motion states that, for every action, there is an equal and opposite reaction.
In the scenario presented above, we can see that for every time the child pushes against the ground, the ground also pushes against the child with opposing but equal force, that corresponds to the force that the child has pushed against it with.
This action and reaction is what enables the child to be able to jump the rope.
Therefore, the action is the child pushing against the ground, the reaction is manifested in the jump, as the ground pushes against the child with equal force.
Newton's Third Law of Motion is exemplified by the forces involved when a child jumps rope: the action is the downward force exerted by the child and the reaction is the equal and opposite upward force from the ground, demonstrating that forces always come in action-reaction pairs.
Newton's Third Law of Motion is illustrated when a child jumps rope. The action in this scenario is the force the child exerts downward on the ground through their feet. In response, there is a reaction force, which is the ground pushing the child upward with an equal and opposite force. This interaction allows the child to lift off the ground and demonstrates that for every action, there is an equal and opposite reaction. This principle explains why the child is able to jump into the air; without the ground pushing back, the child would not move upward.
In a broader sense, Newton's third law emphasizes the interaction between two objects and confirms that forces come in pairs; an action force and a reaction force. These forces are always equal in magnitude but opposite in direction. The third law is critical in understanding how motion and forces work together. It applies to all situations involving forces, not just when a child is jumping rope but also in various everyday actions and complex scientific phenomena.
How much energy is released during the formation of 1 mol H2O(g)?
Answer: -241.82 kj
Explanation:
answer: -241.82 then 483.64
Explanation:
Can someone please do the last column for me
Answer:
First one is : London dispersion
Second one is: London dispersion
Third One is : dipole-dipole
Fourth one is : induced dipole
Explanation:
what does chemical reaction mean?
A process that involve rearrangement of the molecules or ionic structure of substance as distinct from change in the physical form or a nuclear reactions
I hope you are satisfied with this answer
Final answer:
A chemical reaction is a transformation where reactants are turned into products, involving changes at the atomic level including breaking and forming of bonds. Chemical equations represent these reactions, which must be balanced to reflect the conservation of matter.
Explanation:
A chemical reaction is a process that fundamentally changes one or more substances, known as reactants, into one or more different substances, known as products. These transformations involve a combination, separation, or rearrangement of atoms. During chemical reactions, bonds between atoms in the reactants are broken and new bonds are formed to create the products.
Chemical reactions are depicted using chemical equations, which have the reactants on the left side, an arrow representing “yields”, and the products on the right side. For a chemical equation to be useful or valid, it must be balanced, meaning it respects the law of conservation of mass with the same number and types of atoms on both sides. Examples of chemical reactions include the rusting of iron, the combustion of gasoline in a car's engine, and the metabolic processes within a living cell. In each case, the initial substances or reactants are transformed into different substances with new properties.
A compound of low solubility
a. is always a strong electrolyte.
b. is always a weak electrolyte.
c. may be a strong or a weak electrolyte.
d. is always a nonelectrolyte.
Answer:
b. is always a weak electrolyte.
Explanation:
Such compounds of low solubility dissociates partly and hence cannot be strong electrolytes
20 POINTS I NEED AN ANSWER A.S.A.P
Mark wants to find out what flavor of ice cream melts the fastest. How can he find out the answer to his question? A. Microwave some ice cream, then drink it after it melts. B. Eat one scoop of each different flavor of ice cream. C. Measure how long it takes to melt one scoop of each different flavor of ice cream. D. Measure how long it takes a container of chocolate ice cream to melt.
Answer:
the correct answer would be "C"
Explanation:
Answer:
C
Explanation:
Help me please I don’t know this
How much heat is required to raise the temperature of a 4.33-g sample of iron (specific heat = 0.450 J/g°C) from 25.0°C to 79.8°C?
106.78 J of heat is required by the iron sample.
Explanation:
We have to find the amount of heat required using the formula,
q = m × c × ΔT
where q is the heat absorbed
m is mass of the metal in grams = 4.33 g
c = specific heat of iron = 0.450 J/g °C
ΔT = change in temperature = 79.8° C - 25°C = 54.8° C
Plugin the values in the above formula, we will get,
q = 4.33 g × 0.450 J/g° C × 54.8° C
= 106.78 J
So 106.78 J of heat is required by the sample of iron.
The heat required to raise the temperature of a 4.33-g sample of iron from 25.0°C to 79.8°C, with a specific heat of 0.450 J/g°C, is 106.074 joules.
Explanation:To calculate the amount of heat required to raise the temperature of a sample, you can use the formula q = mcΔT, where q is the heat in joules, m is the mass of the substance in grams, c is the specific heat capacity (J/g°C), and ΔT is the change in temperature in degrees Celsius (°C).
For the given 4.33-g sample of iron with a specific heat of 0.450 J/g°C, raising the temperature from 25.0°C to 79.8°C, the heat can be calculated as follows:
q = (4.33 g) × (0.450 J/g°C) × (79.8°C - 25.0°C)
q = (4.33 g) × (0.450 J/g°C) × (54.8°C)
q = 106.074 J
The heat required to raise the temperature of the iron sample is therefore 106.074 joules.
Which of the following is a Brønsted-Lowry base?
A- HCl
B- HCO
C- H3O+
D- H3PO4
C. H₃O⁺ is a Bronsted Lowry base.
Explanation:
Any substance that accepts hydrogen ions or (H⁺) ions or protons during any chemical reaction is termed as a Bronsted Lowry base.
Here HCl donates a proton so it is not a Bronsted Lowry base.
HCO is also not a Bronsted Lowry base.
H₃O⁺ is a Bronsted Lowry base because it accepts H⁺ ion from one of its reactant.
H₃PO₄ is also not a Bronsted Lowry base.
So option C. H₃O⁺ is a Bronsted Lowry base.
Out of the given options, H3PO4 is a Brønsted-Lowry base because it can accept a proton to form its conjugate acid.
The Brønsted-Lowry theory defines an acid as a substance that donates a proton (H+) and a base as a substance that accepts a proton. Based on this definition, out of the options given, D- H3PO4 is a Brønsted-Lowry base because it can accept a proton to form its conjugate acid. The other options, A- HCl, B- HCO, and C- H3O+, are all Brønsted-Lowry acids because they can donate a proton.
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A weather balloon has a volume of 1750 L at 103 kPa. The balloon is then released to the atmosphere. What is the pressure if at its highest point above the ground the volume of the balloon is 5,150 L
I also need help with this... chemistry is so difficult
Answer:
35.0 kPa
Explanation:
As pressure decreases, the volume of a gas increases at a given temperature., so since the balloon got bigger, the new pressure must be less than 103kPa
Assuming the temperature does not change, use Boyles Law
P1V1 = P2V2
(103kPa) (1750L) = P2 (5150L)
P2 = (103)(1750) / 5150
The pressure of the gas is inversely proportional to the volume of the gas. The pressure of the balloon at 5150 L is 35.0 kPa.
What is Boyle's Law?Boyle's Law states the relationship between the initial pressure and volume to the final pressure and the volume. It is given as,
[tex]\rm P_{1}V_{1} = \rm P_{2}V_{2}[/tex]
Given,
The initial pressure of the weather balloon = 10.3 kPa
The initial volume of the weather balloon = 1750 L
The final pressure of the weather balloon =?
The final volume of the weather balloon = 5150 L
Substituting values in the above equation:
[tex]\begin{aligned} \rm P_{2} &= \rm \dfrac{P_{1}V_{1}}{V_{2}}\\\\&= \dfrac{103 \times 1750}{5150}\\\\&= 35 \;\rm kPa\end{aligned}[/tex]
Therefore, the final pressure decreases with an increase in volume.
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Your town is at sea level, and it is a comfortable room-
temperature day. The speed of sound in air at this temperature
is about 343 m/s. If a siren from the firehouse takes 0.200
seconds to arrive at your school, how far is your school from
the firehouse? _meters
Answer:
68.6 m
Explanation:
Speed is defined as distance covered per unit time and expressed as
S=d/t
Where d is distance and t is speed.
Making d the subject of the above formula then
d=st
Substituting 343 m/s dor s and 0.200 s for s then
d=343*0.2=68.6 m
Therefore, the distance is 68.6 m
The distance that should be far is your school from the firehouse is 68.6 m
Calculation of the distance:Here speed refers to the distance covered per unit
Speed = distance / time
So,
Distance = speed * time
d=343*0.2
=68.6 m
Therefore, we can conclude that the distance is 68.6 m
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What is the specific heat of copper if a 105 g sample absorbs 15200 joules and the change in temperature is 377 0C ? (Draw a temperature time graph)
Answer : The specific heat of copper is, [tex]0.384J/g^oC[/tex]
Explanation :
Formula used :
[tex]q=m\times c\times \Delta T[/tex]
where,
q = heat absorb = 15200 J
m = mass of sample = 105 g
c = specific heat capacity of copper = ?
[tex]\Delta T[/tex] = change in temperature = [tex]377^oC[/tex]
Now put all the given values in the above formula, we get:
[tex]15200J=105g\times c\times 377^oC[/tex]
[tex]c=0.384J/g^oC[/tex]
Therefore, the specific heat of copper is, [tex]0.384J/g^oC[/tex]
For the reaction 3 CO + Fe2O3 --> 2 Fe + 3 CO2, how many liters of carbon monoxide at STP are needed to produce 1,001 grams of metallic iron?
Answer:
600.6L
Explanation:
Step 1:
The balanced equation for the reaction.
3CO + Fe2O3 --> 2Fe + 3CO2
Step 2:
Determination of the number of moles in 1001g of Fe.
This is illustrated below:
Mass of Fe = 1001g
Molar Mass of Fe = 56g/mol
Number of mole =?
Number of mole = Mass/Molar Mass
Number of mole of Fe = 1001/56
Number of mole of Fe = 17.875 mole
Step 3:
Determination of the number of mole of CO that reacted during the process.
This is illustrated below:
3CO + Fe2O3 --> 2Fe + 3CO2
From the balanced equation above,
3 moles of CO produced 2 moles of Fe.
Therefore, Xmol of CO will produce 17.875 moles of Fe i.e
Xmol of CO = (3 x 17.875)/2
Xmol of CO = 26.8125 moles
Step 4
Determination of the volume occupied by 26.8125 moles of CO at stp.
1 mole of a gas occupy 22.4L at stp.
Therefore 26.8125 moles of CO will occupy = 26.8125 x 22.4 = 600.6L
Therefore, 600.6L of CO is needed to produce 1001g of Fe
Answer:
[tex]V=602L[/tex]
Explanation:
Hello,
In this case, for the given chemical reaction:
[tex]3 CO + Fe_2O_3 \rightarrow 2 Fe + 3 CO_2[/tex]
In such a way, for the 1,001 g of iron, we compute the required moles of carbon monoxide by using the 2:3 mole ratio:
[tex]n_{CO}=1,001gFe*\frac{1molFe}{55.845gFe}*\frac{3molCO}{2molFe} \\\\n_{CO}=26.89molCO[/tex]
Finally, we use the ideal gas equation to compute the volute at STP conditions (1atm and 273K):
[tex]V=\frac{nRT}{P}=\frac{26.89mol*0.082\frac{atm*L}{mol*K}*273K}{1atm} \\\\V=602L[/tex]
Best regards.
Based on the chart, determine the identity of a substance that increases in temperature by 11.4oC when 1250J of energy are added to a 55g sample.
Substance Specific Heat (J/g oC)
Lithium 3.56
Vegetable Oil 1.99
Air 1.02
Iron 0.444
Sand 0.290
Gold 0.129
Salt
Air
Lithium
Vegetable Oil
Answer:
LIthium vegetable oil
A volatile liquid is evaporated in a flask in a boiling a water bath (
Temperature = 100°C) with a volume of 297ml. The evaporated gas is
condensed in the flask and it is found to have a mass of 0.435g.
Atmospheric pressure for that day is 765mmHg. What is the Molar Mass of
the Volatile liquid? Show work
Answer:
Molecular Weight of gas = 44.418 grams/mole
Explanation:
PV = nRT = (mass/f.wt.)RT => f.wt. = mass·R·T/P·V
mass = 0.435g
R = 0.08206·L·atm/mol·K
T = 100°C = 372K
P = (765/760)Atm = 1.01Atm
V = 297ml = 0.297L
f.wt. = (0.435g)(0.08206L·Atm/mol·K)(372K)/(1.01Atm)(0.297L) = 44.418 grams/mole
A gas takes up a volume of 35 L, and has a pressure of 4.8 atm. What is the new pressure of
the gas if the volume decreases to 23 L?
Answer:
7.3 atm
Explanation:
- Use the formula P1V1 = P2V2
- Rearrange formula and then plug in values.
- Hope this helped! Let me know if you need more help or a further explanation.
City A is located along the shore of an ocean. City B is at the same latitude and altitude, but it is located
about 124 miles (200 km) inland, away from any large bodies of water. Which of the following
statements most likely describe these two cities? Check all that apply.
In the summer, the daytime temperature in City A is typically lower than the daytime temperature
in City B.
In the winter, the daytime temperature in City B is typically lower than the daytime temperature
in City A
City A typically has both higher high temperatures and lower low temperatures than City B.
Answer:
A and B
Explanation:
Answer: A and B.
Explanation:
I took the enginuidy
What is thermal energy?
the average overall volume of a system
the total number of molecules in a system
the kinetic energy of particles in a system
the measure of temperature in a system
Answer:
c
Explanation:
got it right on edg
_____ H2O2 → _____ H2O + _____ O2
2. How many moles of oxygen form from 0.51 moles of hydrogen peroxide?
Answer : The number of moles of oxygen formed are, 0.255 moles.
Explanation :
The given chemical reaction is:
[tex]H_2O_2\rightarrow H_2O+O_2[/tex]
This reaction is an unbalanced chemical reaction because in this reaction number of oxygen atoms are not balanced.
In order to balance the chemical equation, the coefficient '2' put before the [tex]H_2O_2[/tex] and [tex]H_2O[/tex] then we get the balanced chemical equation.
The balanced chemical reaction will be:
[tex]2H_2O_2\rightarrow 2H_2O+O_2[/tex]
Now we have to calculate the number of moles of oxygen formed.
From the balanced chemical reaction we conclude that,
As, 2 moles of hydrogen peroxide react to give 1 mole of oxygen
So, 0.51 moles of hydrogen peroxide react to give [tex]\frac{0.51}{2}=0.255[/tex] mole of oxygen
Therefore, the number of moles of oxygen formed are, 0.255 moles.
What structures are found in clusters in the mouth and have nerve cells that gather information about whether food is sweet, salty, bitter or sour?
A.
tonsils
B.
saliva glands
C.
taste buds
D.
nostrils
Answer:
taste buds
Explanation:
An aqueous 0.300 M glucose solution is prepared with a total volume of 0.150 L. The molecular weight of
glucose is 180.16
mol
What mass of glucose (in grams) is needed for the solution?
Answer:
8.11g
Explanation:
Given parameters:
Molarity of aqueous solution = 0.3M
total volume = 0.15L
Molecular weight of glucose = 180.6g/mol
Unknown:
Mass of glucose needed in the solution = ?
Solution:
To solve this problem, we need to understand molarity.
Molarity is the number of moles of solute in a given volume of solution. In this problem, the solute here is the glucose and the solvent is water.
Molarity = [tex]\frac{number of moles of solute}{volume of solution}[/tex]
A solution is made up of solute and solvent.
now, let us solve for the number of moles of the solute which is glucose;
Number of moles of glucose = molarity x volume of solution;
= 0.3 x 0.15
= 0.045mole
Now to find the mass of glucose;
mass of glucose = number of moles x molar mass
input the parameters;
Mass of glucose = 0.045 x 180.16 = 8.11g
To determine the amount of glucose needed for the solution, we calculate the number of moles of glucose in the solution and then use the molecular weight of glucose to convert this to grams. Thus, 8.107 g of glucose is necessary for the solution.
Explanation:To figure out how much glucose we need, we'll have to use molarity, which measures the concentration of a solution. The molarity is defined as the number of moles of solute (in this case, glucose) per liter of solution.
Therefore, we first find the number of moles in the 0.150 L solution by multiplying 0.300 M by 0.150 L, which gives us 0.045 moles of glucose. Then, we multiply this by the molecular weight of glucose, which is 180.16 g/mol. Therefore, to create the solution, we'd need 8.107 g of glucose.
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what element has the electrons configuration of [Ar]4s^2 3d^5
Answer:
Manganese
Explanation:
Using rules you will find the location on 3d^5 because you subtract one level when in the d block
Final answer:
Manganese (Mn) has the electron configuration [Ar]4s² 3d⁵. It is a transition metal in the fourth period and seventh group of the periodic table.
Explanation:
The element that has the electron configuration of [Ar]4s² 3d⁵ is manganese (Mn). This configuration indicates that the element has two electrons in the 4s orbital and five electrons in the 3d orbital, following argon's stable noble gas electron configuration. Manganese is located in the fourth period and in the seventh group of the transition metals in the periodic table.
which statement best describes a newton
Use the drop-down menus to identify the effect of each mutation.
A mutation that causes a human to have eleven toes is .
A mutation that causes a desert snake to have sand-colored scales is .
A mutation that causes a person to have too much sugar in her blood is .
Answer:
*Neutral 1
* Beneficial 2
*harmful 3
Explanation:
it's actually an answer
A mutation that causes a human to have eleven toes is neutral, mutation that causes a desert snake to have sand-colored scales is beneficial and mutation that causes a person to have too much sugar in her blood is harmful.
What is mutation ?A difference from the typical DNA sequence at a certain gene locus. But even though the phrase is commonly associated with criticism, mutations variation can affect cell activity in ways that are negative, positive, or neutral. The words "variant" and "mutation" are occasionally used interchangeably.
Base substitutions, deletions, and insertions are the three different kinds of DNA mutations.
Thus, a mutation that causes a human to have eleven toes is neutral, mutation that causes a desert snake to have sand-colored scales is beneficial and mutation that causes a person to have too much sugar in her blood is harmful.
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