Which refers to the number of wavelengths that pass a fixed point in a second?
A: wavelength
B: amplitude
C: frequency
D: compression
Answers
Answer:
C: Frequency
Explanation:
C. frequency refers to the number of wavelengths that pass a fixed point each second
Related Questions
pls help will give brainiest
Answers
Answer:
The answer is B
Explanation:
The moon is in-between the sun and the Earth during a new moon.
What would the molecular formula be if lithium and sulfur reacted to form a neutral compound?
Answers
Answer:
Li2SExplanation:
Since Lithium gives away one electron, I believe it goes to Sulfur.
Hope this helps! :)
Answer:
Li*2S
Explanation:
ed tell chem
A chemist conducts a titration on 50 mL of a solution of hydrobromic acid (HBr) of unknown strength. She finds the pH reaches the equivalency point with the addition of 15 mL of 0.30 M sodium hydroxide (NaOH). What is the concentration of the HBr solution?
Answers
The concentration of the HBr would be 0.09 M
What are stoichiometric problems?First, let us look at the equation of the reaction:
\(HBr + NaOH --- > NaBr + H_2O\)
The mole ratio of HBr to NaOH is 1:1.
Mole of 15 mL, 0.30 M NaOH = 0.30 x 15/1000 = 0.0045 moles
Equivalent mole of HBr - 0.0045 moles
Molarity of HBr = mole/volume = 0.0045/50/1000 = 0.09 M
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What is Chemical bond ?
Answers
Answer:
Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world.
Explanation:
Have a nice day:)
Answer: A connection between two surfaces or objects that have been joined together, especially by means of an adhesive substance, heat, or pressure.
Explanation: The bond may result from the electrostatic force or attraction between oppositely charged icons as in iconic bonds or through the sharing of electrons as in covalent bonds.
Which feature in the ^1H NMR spectrum provides information about the number of neighboring protons of each proton in the compound? a. number of signals b. integral c. multiplicity d. chemical shift
Answers
The answer is c. multiplicity. In a ^1H NMR spectrum, the multiplicity of a signal provides information about the number of neighboring protons for each proton in the compound. If a signal is a singlet, it indicates that the proton has no neighboring protons, while a doublet suggests that the proton has one neighboring proton.
Here, correct answer will be
Other multiplicities, such as a triplet, quartet, or septet, indicate the presence of two, three, or four neighboring protons, respectively.
The integration of a signal also provides information about the number of protons present in the compound, but it does not provide information about the number of neighboring protons that each proton has.
The chemical shift of a signal provides information about the environment of the proton, but not the number of neighboring protons.
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Surprisingly, dipole-diple is not the predominant intermolecular force between ibr molecules in liquid ibr. Based on this information, what must be the main imf for ibr?.
Answers
Dipoles are not the dominant intermolecular forces between IBr molecules in liquids. IBr is a covalent bond.
A covalent bond is a chemical bond that requires the sharing of electrons to form electron pairs between atoms. The constant balance between attractive and repulsive forces between atoms according to their share of electrons is called a covalent bond.
Covalent bonds are much more common in natural chemistry than ionic bonds. A covalent bond is the simultaneous attraction of the nucleus to one or more electron pairs. Covalent compounds generally have low boiling and melting factors and are determined in all three body states at room temperature. Covalent bonds no longer conduct electricity; This is because covalent compounds no longer have charged particles that can carry electrons.
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which of the following items on the income statement and balance sheet is MOST likely to vary spontaneously with sales?
1. notes payable
2. common stock
3. accrued expenses
4. capital in excess of par
Answers
Accrued expenses is the most likely item on the income statement and balance sheet to vary spontaneously with sales (option 3).
Accrued expenses refer to an expense that a company has incurred but has not yet paid for. For example, wages that employees have earned but not yet received payment for, rent, interest, and taxes that have been accrued but not yet paid are all examples of accrued expenses.
Accrued expenses are spontaneous liabilities, which means they vary in proportion to a company's sales volume. The higher the sales, the more the company is likely to owe in accrued expenses. The company must record the accrued expenses as liabilities on the balance sheet and as expenses on the income statement.
Accrued expenses are likely to increase when sales volume increases, and they decrease when sales volume decreases. It means that accrued expenses are the most likely item on the income statement and balance sheet to vary spontaneously with sales.
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This is my 6th time posting this questions. please not bots or links
and please *explain* the answer and steps
I really need help understanding this.
describe the process to determine the limiting reactant in the example listed below:
Given 3.4 grams of x element with a molar mass of 24 g/mol and 4.2 grams of y element with a molar mass of 35 g/mol. How much of compound xy2 can be generated?
x + 2y -> xy2
Answers
The amount of the compound \(XY_2\) that can be generated would be 11.28 grams
Stoichiometric calculationFrom the equation of the reaction, the mole ratio of X and Y is 1:1.
Mole of 3.5 grams of X = 3.4/24 = 0.1417 moles
Mole of 4.2 grams of Y = 4.2/35 = 0.12 moles
Thus, Y is the limiting reactant because it is present in a lower amount than needed.
Mole ratio of Y and \(XY_2\) = 1:1
Equivalent mole of \(XY_2\) = 0.12 moles
Molar mass of \(XY_2\) = 24 + (35x2) = 94 g/mol
Mass of 0.12 moles of \(XY_2\) = 0.12 x 94 = 11.28 grams
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what is the lewis structure for RnF2
Answers
Answer:
E3 ubiquitin-protein ligase RING2 is an enzyme that in humans is encoded by the RNF2 gene.
Explanation:
Lewis structure of Radon difluoride has three lone pairs and two bonding pairs.
What is Lewis structure?Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, are diagrams that depict the bonding between atoms in a molecule, as well as any lone pairs of electrons that may be present. It's used to depict how electrons in a molecule are distributed around specific atoms. Electrons are shown as "dots" or as a line between two atoms when they are bonded.
Hence, Lewis structure of Radon difluoride is
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Help me with this please
Answers
Answer:
–253.5 °C
Explanation:
We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:
Molar mass of CO₂ = 12 + (2×16)
= 12 + 32
= 44 g/mol
Mass of CO₂ = 6 g
Mole of CO₂ =.?
Mole = mass / molar mass
Mole of CO₂ = 6 / 44
Mole of CO₂ = 0.136 mole
Next, we shall convert 225 mL to L.
1000 mL = 1 L
Therefore,
225 mL = 225 mL × 1 L / 1000
225 mL = 0.225 L
Next, we shall determine the temperature of the gas. This can be obtained as follow:
Pressure (P) = 0.855 atm
Volume (V) = 0.225 L
Number of mole (n) = 0.136 mole
Gas constant (R) = 0.0821 atm.L/Kmol
Temperature (T) =?
PV =nRT
0.855 × 0.255 = 0.136 × 0.0821 × T
0.218025 = 0.0111656 × T
Divide both side by 0.0111656
T = 0.218025 / 0.0111656
T = 19.5 K
Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:
T(°C) = T(K) – 273
T(K) = 19.5 K
T(°C) = 19.5 – 273
T(°C) = –253.5 °C
Therefore, the temperature of the gas is –253.5 °C
A água oxigenada é uma solução que contém a substância peróxido de hidrogênio.Ela é usada como bactericida.Quando aplicamos a água oxigenada em um ferimento,podemos observar a intensa formação de bolhas.Isso ocorre porque temos uma enzima chamada catalase. Ela não participa da reação química,mas leva a rápida reação de decomposição do peróxido de hidrogênio em água e em gás oxigênio.Escreva a equação química que representa a transformação descrita no texto
Answers
Answer:
Ver explicacion
Explanation:
Como se mencionó en la pregunta, un catalizador aumenta la velocidad de una reacción pero él mismo no participa en la reacción.
La descomposición del peróxido de hidrógeno se muestra mediante la ecuación;
2H2O2 (l) ------> 2H2O (l) + O2 (g)
La enzima involucrada en el proceso es la catalasa.
The following data applies to a mineral block: - 200 grams of contained gold in total - 100 tonnes of rock/ore - Selling price of gold $11.25 per gram - Cost of processing $12.00 per tonne - Cost of mining $1.20 per tonne - Block Value =$817.5 1. What is the metallurgical recovery?
Answers
The metallurgical recovery for the mineral block is 465%. The metallurgical recovery refers to the percentage of valuable metal or minerals that is successfully extracted or recovered from an ore or mineral sample during the metallurgical or mineral processing operations.
The metallurgical recovery can be calculated by determining the percentage of gold recovered from the mineral block during the processing.
To calculate the metallurgical recovery, we need to determine the total amount of gold recovered from the mineral block. We know that the block contains 200 grams of gold in total. Therefore, the metallurgical recovery can be calculated as follows:
Metallurgical Recovery = (Gold Recovered / Total Gold Content) * 100
Gold Recovered = Selling Price of Gold * Total Gold Content - Cost of Processing
Gold Recovered = $11.25/g * 200 g - ($12.00/tonne * 100 tonnes + $1.20/tonne * 100 tonnes)
Gold Recovered = $2250 - ($1200 + $120)
Gold Recovered = $930
Metallurgical Recovery = ($930 / 200) * 100
Metallurgical Recovery = 465%
Therefore, the metallurgical recovery for the mineral block is 465%. This indicates that the processing has resulted in a recovery of 465% of the gold initially present in the mineral block.
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The charge of electron cloud of Atom x equals to - 4x10to the power-18 C, write the atomic representation knowing that it has 30 neutrons.
Answers
Answer:
the most common oxidation no.of manganese is + 2 + 3 + 4 + 6 + 7
Explanation:
What do carnivores do and what is another name for them? PLEASE HELP
Answers
A pH scale is used to measure?
Answers
Answer:
A pH scale is used to measure acidity.
Answer:
How acidic or alkaline a substance is.
Explanation:
1 = Strong acid e.g. Stomach acid
7 = Neutral e.g. Water
14 = Strong alkaline e.g. Sodium hydroxide
mercur\ forms a compound with chlorine that is 73.9% mercur\ and 26.1% chlorine b\ mass. what is the empirical formula?
Answers
The empirical formula is HgCl₂, which is mercuric chloride, as it indicates that the ratio of mercury to chlorine in the compound is 1:2.
To determine the empirical formula of a compound containing mercury and chlorine, we need to convert the percentage composition by mass into mole ratios. Assuming a 100-gram sample, the mass of each element can be determined, and the corresponding number of moles can be calculated using their atomic masses. Dividing the number of moles of each element by the smaller value and multiplying to get whole-number ratios yields the empirical formula. In this case, the empirical formula is HgCl₂, which is mercuric chloride, as it indicates that the ratio of mercury to chlorine in the compound is 1:2.
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Complete question:
Mercury forms a compound with chlorine that is 73.9% mercury and 26.1% chlorine by mass. what is the empirical formula?
WILL MARK AS BRAINLIEST IF CORRECT
Answers
\(\huge\bold{\purple{\bold{⚡a.⚡}}} \)
\(\huge\bold{\red{\bold{⚡c.⚡}}} \)
Both of the above are correct- because :
Products in a reaction are next to the direction arrow. So, CO2 is a product. Reactants are present on LHS(side opposite to the direction of arrow). So O2 is a reactant\(\huge\underline\mathtt\colorbox{cyan}{Hope it helps!}\)
A substance made up of only silicon and chlorine contains 79. 1% mass % of chlorine. If the molar mass is 537. 8 g/mol, what is the molecular formula.
Answers
We first need to know the atomic weights of silicon and chlorine in order to obtain the empirical formula.Answer:Statistical SiCl3 ,Atomic Si2Cl6
What is the molecular formula ?It has a chlorine content of 79.1%, therefore (100 - 79.1)% silicon equals 20.9% chlorine.
We first need to know the atomic weights of silicon and chlorine in order to obtain the empirical formula.
it is 35.5 and 28.
The percentage abundances are then divided by the corresponding atomic masses
explain,
Cl = 79.1/35.5 = 2.23
Si = 20.9/28 = 0.75
The result of this division by the smallest number is 0.75.
Cl = 2.23/0.75 = 3
Si = 0.75/0.75 = 1
SiCl3 is the empirical formula.
The molecular formula is as follows:
(28+3(35.5))n = 269
134.5n = 269
n = 269/134.5 = 2
Si2Cl6 is the molecular formula.
Answer:Statistical SiCl3 ,Atomic Si2Cl6
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A solution of iodine changes from brown to blue when starch is added to it.
Which statement is true regarding the reaction?
You are observing the disappearance of products over time.
You are observing the disappearance of reactants over time.
You are observing the appearance of the transition state over time.
You are observing the appearance of products over time.
Answers
A solution of iodine changes from brown to blue when starch is added to it. You are observing the disappearance of reactants over time. Therefore, the correct option is option B.
A homogenous mixture of more than one component is referred to as a solution. On a particle-by-particle basis, it is homogeneous. Most of the time, people picture it as a liquid that has dissolved solids, liquids, or gases in it. This is not totally accurate, though. Alloys are a good alternative that we may use.
Solute is the name for the part of a solution that dissolves in the solvent. The solute constitutes the solution's tinier component. For instance, iodine represents the solute in "tincture of iodine," an alcohol-based solution of iodine. A solution of iodine changes from brown to blue when starch is added to it. You are observing the disappearance of reactants over time.
Therefore, the correct option is option B.
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suppose that daniel has a 2.50 l bottle that contains a mixture of o2 , n2 , and co2 under a total pressure of 5.10 atm. he knows that the mixture contains 0.310 mol n2 and that the partial pressure of co2 is 0.250 atm. if the temperature is 273 k, what is the partial pressure of o2 ?
Answers
The partial pressure of O₂ from daniel's 2.5L bottle that contains a mixture of O₂, N₂ and CO₂ under a total pressure of 5.10 atm is 2.171atm.
What is partial pressure?In a mixture of gases, each constituent gas has a partial pressure which is the notional pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature.
How to calculate the partial pressure of O₂?
Volume (V) = 2.5L
T = 273K
o₂ + N₂ + CO₂ ---> Total pressure P = 5.1atm
N₂ = 0.31 mol
Partial pressure CO₂ = 0.25atm
R = 0.0821L (ideal gas constant with given volume in L and temperature in K)
P*V = n*R*T
n = P*V / R*T
= (5.1 * 2.5) / (0.0821 * 273)
= 12.75 / 22.4133
= 0.56886 mole
Partial pressure of N₂
= mol fraction * Total pressure
= (0.31 / 0.56886) * 5.1
= 2.779atm
Total pressure
P = P O₂ + P N₂ + P CO₂
5.2 = P O₂ + 2.779 + 0.25
P O₂ = 5.2 - 2.779 - 0.25
P O₂ = 2.171atm
Therefore, the partial pressure of O₂ is 2.171atm.
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At 35 degrees C, a small methane gas has a volume of 1.5 liters. The temperature of the methane gas is slowly cooled to to 17 degrees C. What is the new volume of the methane sample?
Answers
Answer: Trump
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Which of the following is true about
chemical reactions?
Answers
Answer:
They are irreversible
Explanation:
This is because it cannot be separated by physical means
Which two substances are reactants in the following chemical equation? CO+H2O -> CO2+H2
A. H2O
B. H2
C. CO2
D. CO
Answers
Answer:
a. and d.
Explanation:
H₂O and CO are reactants in the following chemical equation which are water and carbon monoxide respectively.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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a student carried out a titration using h2so4 and koh. the balanced equation for the reaction is: h2so4 (aq) 2 koh (aq) --> k2so4 (aq) 2 h2o (l) the student determined that 0.228 mol koh were used in the reaction. how many moles of h2so4 would have been needed to react with all of this koh?
Answers
0.114 mol of \(H_2SO_4\) need to react with all of this KOH
What does a neutralization reaction produce?A neutralization reaction occurs when an acid and a base react in aqueous solution to form a salt and water. A salt is the watery sodium chloride formed during the process.A neutralisation reaction occurs when an acid and a base react to form salt and water.A balanced chemical equation identifies the reactants and products, as well as the precise number of molecules or moles of each consumed or produced.Balance Equation:
\(2 KOH ( aq ) + H 2 SO 4 ( aq ) \rightarrow K_2 SO_4 ( aq ) + 2 H_2 O ( l ) .\)
from the Equation we know that 2 mol of KOH react with 1 mole of sulphuritic acid.
so
moles of h2so4 = Moles of KOH/ 2
=0.228/2 = 0.114 moles
0.114 mol of \(H_2SO_4\) need to react.
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4. Plant cells have large, round vacuoles they primarily use for-
Answers
Plant cells have large, round vacuoles they primarily use for water storage so that will be option A.
A vacuole is a membrane-bound organelle found in plant, fungus, and animal cells, as well as certain protist, animal, and bacterial cells. Vacuoles are simply confined compartments filled with water holding inorganic and organic molecules in solution, including enzymes, while in certain situations they may also include solids that have been absorbed.
Vacuoles are generated by the fusing of several membrane vesicles and are just bigger versions of these. The organelle has no fixed form or size; its structure changes depending on the needs of the cell.
The role and relevance of vacuoles vary substantially depending on the kind of cell in which they are found, with plants, fungi, and some protists having far more prominence than animals and bacteria. In general, the vacuole performs the following functions:
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Complete question:
Plant cells have large, round vacuoles they primarily use for -
A) water storage
B) energy production.
C) protein synthesis.
D) waster removal
A triglyceride is formed through a ____________reaction between a glycerol and _______fatty acid(s).
Answers
Glycerol and three fatty acids react via condensation to produce a triglyceride.
Triglycerides, also known as triacylglycerols, are a type of lipid or fat that are commonly found in foods and stored in the body. They are composed of three fatty acids that are linked to a glycerol molecule through ester bonds.
The process of forming a triglyceride is called esterification or condensation reaction, which involves the removal of a water molecule between the carboxyl group of the fatty acid and the hydroxyl group of the glycerol molecule. This process is catalyzed by enzymes called lipases and occurs in both plants and animals.
The three fatty acids that make up a triglyceride can vary in length, degree of saturation, and location of double bonds, which affects the properties and function of the triglyceride. For example, saturated fatty acids tend to be solid at room temperature and are commonly found in animal fats, while unsaturated fatty acids tend to be liquid at room temperature and are commonly found in plant oils.
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QUESTIONS
40. Because stimulants
will be compromised.
your ability to use proper judgment on the road
A. increase your heart rate
B. overload your nervous system
C. slow down your bodily functions
D. usually cause hallucinations
Answers
Answer:
B.
Explanation:
A neutral atom of Cobalt (Co) has an atomic number of 27 and an atomic mass of 59. Therefore, Co has _________________________
Answers
Answer:
A neutral atom of Cobalt (Co) has an atomic number of 27 and an atomic mass of 59. Therefore, Co has 27 electrons, 27 protons and 32 neutrons.
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
The atomic number Co is 27 it means it has 27 protons and 27 electrons.
The mass number is sum of protons and neutrons, thus number of neutrons are
59 - 27 = 32 neutrons
propose a synthesis of cyclohexanecarboxylic acid from diethyl propanedioate and other reagents of your choice. use a sheet of paper to draw your synthesis. take a picture of your answer and post it for others in your group to see. comment on the posts of at least two other students - have they correctly developed a synthetic route to the desired product?
Answers
The synthetic route involves three key steps: ketalization, oxidation, and acid hydrolysis.
The proposed synthesis is as follows:
Diethyl propanedioate is first converted to 2-methyl-2-hydroxymethyl-1,3-dioxolane via ketalization with formaldehyde and acetic acid in the presence of p-toluenesulfonic acid as a catalyst.
The resulting ketal is then oxidized to the corresponding carboxylic acid, 3-(hydroxymethyl)-2-methylcyclohexanecarboxylic acid, using Jones reagent (CrO3/H2SO4) or other suitable oxidizing agents.
Finally, the hydroxymethyl group is removed by treatment with a strong acid such as hydrochloric acid, yielding the desired product, cyclohexanecarboxylic acid.
Overall, this synthetic route involves three key steps: ketalization, oxidation, and acid hydrolysis. The use of diethyl propanedioate as a starting material enables the introduction of a carboxylic acid group in the final product, while the use of formaldehyde and acetic acid in the ketalization step provides the necessary alkyl and hydroxyl groups for subsequent oxidation and acid hydrolysis reactions.
As for the comments on the posts of other students, I cannot do so as there are no posts by other students in this thread.
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Callie did a lab during which she investigated the difference in cellular respiration rates between two different types of corn: germinating and non-germinating. A germinating seed is one from which a plant has started to grow. A non-germinating seed is usually dry and a new plant has not yet emerged. The data that she gathered are displayed in the graph.
Which of the following statements are true concerning the data that Callie gathered during the lab? Choose the two that apply.
Graph has a horizontal label of time and a vertical label of mL of oxygen consumed. The germinating corn seed line extends from 0-1.6 at the far end of the graph. The non-germinating corn seed line extends from 0-0.2.
A. The germinating corn seed consumed more oxygen than the non-germinating corn seed.
B. The non-germinating corn seed produced more carbon dioxide than the germinating corn seed.
C. The non-germinating corn seed performed more cellular respiration than the germinating corn seed
D. The germinating corn seed produced more energy than the non-germinating corn seed.
E. The non-germinating corn seed performed cellular respiration and the germinating corn seed performed fermentation.
Answers
A germinating seed is one from which a plant has started to grow. A non-germinating seed is usually dry, and a new plant has not yet emerged. The germinating corn seed consumed more oxygen than the non-germinating corn seed. This statement is true. Therefore, option A is correct.
What is germinating seed ?A dry seed starts to absorb water through its seed coat when it comes into touch with damp soil or growing medium. The seed swells and the seed coat splits open as it absorbs more water. Small shoots and roots make up the embryo inside the seed. First to appear from the seed is the root.
The prerequisites for seed germination include oxygen, water, temperature, and, only for particular seeds, light. The sprouting of seeds is impacted when one or more of these are missing. Similar internal elements that impact this process include seed viability, dormancy, and embryonic maturity.
Thus, option A is correct.
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