As a species evolve, they develop ________ and ________ others
3 points
old traits, save
new traits, save
old traits, lose
new traits, lose

Answer:

physical science

Explanation:

because it touches all other natural sciences. biology,physics, etc. it is known as the central science:)

Chemistry is a branch of science that focuses on the study of matter, its properties, composition, and how it undergoes changes.Thus, it is a physical science.

Chemistry is a physical science because it investigates the physical and chemical properties of matter, including atoms, molecules, and their interactions. It is also considered a natural science because it studies natural phenomena and processes that occur in the world around us.

Chemistry plays a crucial role in various fields such as medicine, environmental science, materials science, and biochemistry.

In chemistry, scientists use experiments and observations to gather data and analyze it using various techniques and tools. They also develop theories and models to explain the behavior and interactions of matter.

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Carvone is an aromatic compound with the molecular formula C10H14O, and it is a chiral molecule with two enantiomers, (R)-carvone and (S)-carvone.

A molecule is a small particle made up of two or more atoms that are held together by chemical bonds. Molecules may have a single type of atom, such as oxygen (O2), or contain different types of atoms, such as water (H2O). Molecules are the smallest part of a substance that still retains the chemical and physical properties of that substance. Molecules are everywhere in nature, and they form the basis of all living things. They are also present in the air we breathe, the food we eat, and the clothes we wear.

1) Carvone is an aromatic compound with the molecular formula C10H14O, and it is a chiral molecule with two enantiomers, (R)-carvone and (S)-carvone.

2) Carvone has two alkenes, one in the endocyclic ring and one in the exocyclic ring.

3) The electron-deficient alkene is the exocyclic alkene. This is because the double bond in the exocyclic ring is conjugated to an aromatic ring, which delocalizes the electrons in the pi system and creates an electron-deficient alkene.

4) The mechanism for this reaction is shown below. The first step is the addition of the hydroperoxide anion (deprotonated hydrogen peroxide) to the electron-deficient alkene. The oxygen from the hydroperoxide anion forms a bond with the carbon of the alkene, and the hydrogen is released as a proton. In the second step, a proton is transferred from the carbon bearing the oxygen to the oxygen, forming a new carbon-oxygen bond and creating the epoxide.

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Answer:

most moths are active at night and hide in the day to avoid predators. camouflage is another way that moths defend themselves. they escape predators by flying in a zigzag motion/ loops/ tight turns/ passive dives or power dives

Explanation:

hope this helped :)

Answer:

Water in a freezer at -2 degrees Celsius

Answer:

A. The specific heat keeps the ocean temperatures more even.

Explanation:

I just took a test on a p e x  and it was correct! :)

The final concentration of NH₃ is greater than the initial concentration due to Le Chatelier's principle, which states that when a system at equilibrium is subjected to a change in concentration, pressure, or temperature, the system will adjust to counteract the change and restore equilibrium.

In the context of the Haber process, where nitrogen (N₂) and hydrogen (H₂) react to form ammonia (NH₃), the reaction can be represented as:
N₂(g) + 3H₂(g) ⇌ 2NH₃(g)
When the initial concentration of NH₃ is increased, according to Le Chatelier's principle, the system will try to counteract the change by shifting the equilibrium position to reduce the concentration of NH₃. This can be achieved by favoring the reverse reaction, in which NH₃ is consumed, and N₂ and H₂ are produced.
On the other hand, if the initial concentration of NH₃ is decreased, the system will attempt to increase the concentration of NH₃ to restore equilibrium. It does this by shifting the equilibrium position in the direction of the forward reaction, in which N₂ and H₂ react to form NH₃. This results in a higher final concentration of NH₃ than the initial concentration, as the system adjusts to counteract the change and restore equilibrium.

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Answer:

The correct answer is - nitrogen is solvent and other gases present in the air are solutes.

Explanation:

As it is given and we know that the earth's atmosphere is made up of various gases including nitrogen, oxygen, carbon dioxide, argon, and water vapor, however, the major part of the atmosphere is made up of nitrogen.

Air is a homogenous mixture of gases and most of the part of the air is, 78.08 percent, nitrogen makes it solvent and other gases mixed with nitrogen are solutes including carbon dioxide and oxygen.

Answer: hola

Explanation:Añada cinco gotas al 2 por ciento de tintura de yodo de farmacopea EE. UU. (U.S.P., por sus siglas en inglés) por cada litro de agua limpia. Para el agua turbia añada diez gotas y deje la solución reposar durante 30 minutos por lo menos.

Answer: I belive it is HH to h-c-n

Explanation: yea

Burning a sugar cube is a chemical change. Fire activates a chemical reaction between sugar and oxygen. The oxygen in the air reacts with the sugar and the chemical bonds are broken. Burning sugar leads to reaction of sugar with oxygen in air and leads to formation of carbon dioxide and water. The change is irreversible and is thus a chemical change

Answer: Carbon,Hydrogen, Chlorine

Explanation:

C=Carbon

H=Hydrogen

Cl=Chlorine

Hope this helps :)

Answer: I believe you are talking about the world's first recorded nuclear explosion that took place on the plains of the Jornada del Muerto Dessert.

Explanation: It is to be noted that the Trinity site is still considered to be radioactive, and Trinitite which is a green glass-like substance is found abundantly in the area. Trinity was an atmospheric test conducted by the U.S. Army on July 16th of 1945. The site was chosen because of its isolated, flat grounded, non-windy lands. This experiment was so tightly gatekept that not even the military policemen whom rode with it knew of its contents.

A type of biotechnology called artificial selection is deliberately breeding plants or animals to promote or eliminate specific desirable qualities. Crops may be carefully bred by farmers, for instance, to increase their resistance to pests or drought.

Artificial selection is a type of biotechnology that involves selectively breeding plants or animals to enhance or suppress certain desirable traits.

For example, farmers may selectively breed crops to make them resistant to pests or droughts.

One benefit of artificial selection for individuals is that it can lead to higher crop yields, which can result in increased profits for farmers. However, one risk of artificial selection for individuals is that it can lead to the loss of genetic diversity in crops, which can make them more vulnerable to disease outbreaks.

One benefit for society is that artificial selection can help to alleviate hunger and food shortages by producing more food. However, one risk for society is that artificial selection can lead to the creation of monocultures, which are vulnerable to pests and disease outbreaks.

One benefit for the environment is that artificial selection can lead to the production of crops that require fewer pesticides and herbicides, which can reduce pollution. However, one risk for the environment is that artificial selection can lead to the loss of biodiversity, which can negatively impact ecosystems.

Attached is an image of a farmer selectively breeding crops.

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• Answer:

m = 3,045.15 g mercur

• Explanation:

Hi there !

density formula

d = m/V =>

=> m = d×V

d(mercury) = 13.534 g/cm3

1ml = 1cm3

V = 225ml = 225cm3

replace

m = 13.534g/cm3×225cm3

m = 3,045.15 g mercur

Good luck !

The synthetic organic chemist who successfully synthesized physostigmine was Robert Burns Woodward.

He was an American organic chemist who is considered by many to be the preeminent organic chemist of the twentieth century. Woodward's synthesis of physostigmine, an alkaloid found in the Calabar bean, was an important milestone in modern organic chemistry. Physostigmine works by obstructing acetylcholine metabolism. The enzyme that breaks down acetylcholine in the synaptic cleft of the neuromuscular junction, acetylcholinesterase, is inhibited in a reversible manner by this substance.Woodward's method of synthesizing physostigmine was the first successful total synthesis of a complex natural product, and it established the precedent for modern organic synthesis.

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The limiting reactant if we mix equal volumes of a 5 M of solution of A and a 3 M solution of B is A.

A limiting reactant is a reactant in a chemical reaction that is used up completely at the end of a reaction.

The limiting reactant is the reactant that determines the amount of product that can be formed from a given amount of reactants that react to form products.

The limiting reactant usually results in the formation of the least amount of product.

Considering the given equation of reaction below:

Equation of reaction: 2 A(aq) + B(aq) → C(aq)

2 moles of A react with 1 mole of B to form 1 mole of C.

Hence the mole ratio of A to B is 2 : 1

Moles of A avaialbele is 5 moles

The moles of B available for the reaction is 3 moles.

From the above, it can be seen that three times the amount of B required is present but less than three times the amount of A required is available. Hence, a is the limiting reactant.

Thus, the amount of C formed will depend on the 5 moles of A available.

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Complete question:

Consider the reaction: 2 A(aq) + B(aq) → C(aq)

What is the limiting reactant if we mix equal volumes of a 5 M solution of A and a 3 M solution of B?

Answer:

environmental issues

Explanation:

When animals eat each other, they are depending on other animals for food or as a source of energy. This is known as a predator-prey relationship, where one organism, the predator, hunts, kills, and consumes another organism, the prey.

In this relationship, the predator relies on the prey as a source of sustenance and nutrients. By consuming other animals, predators obtain the energy and nutrients they need for survival, growth, and reproduction. This interdependence between predators and prey is a fundamental aspect of ecological balance and plays a crucial role in regulating populations within ecosystems. Predation helps control prey populations, preventing overpopulation and maintaining biodiversity.

It is important to note that not all animals are strictly predators or prey. Many animals occupy different positions in the food chain, acting as both predators and prey depending on their interactions with other organisms. This complex network of predator-prey relationships contributes to the stability and functioning of ecosystems.

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The coordination number (C.N.) is 6 and oxidation number (O.N.) is +4 of the metal atom.

C.N. = 6; O.N. = +4

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Answer:

drug addiction

Explanation:

Wanna take it all back to where it started

Life of the party

Right where my heart at

Soon as what I want come in, I say anything goes

On the road, cool, ridin' 'round with the top down

Nowhere to go to, decide that I'll just ride 'round

She a drug abuser from a broken heart, oh, oh

Got a bad addiction, I been druggin' hard all month long

I'm in that Wraith, I ain't got nothin' but some residue on me

I'm chasin' a check to the morning

I'm in the trenches with smokers and steppers and loners

Somethin' more than one Schedule II on me

Matter fact, just a convicted felon, I'm keepin' my weapon

I'm pourin' more blood on that money

Owe it all to the youngin who feel that he owe the ones

Put addiction 'fore hunger

If a 5 kb plasmid has one EcoRI restriction site, and a 5 kb linear piece of DNA has one EcoRI restriction site, and you cut both of them with EcoRI, the result would be the production of linear DNA fragments from both the 5 kb plasmid and the 5 kb linear piece of DNA.

The DNA fragments would be of unequal sizes.

The 5 kb linear piece of DNA would be split into two linear DNA fragments - one that is 5 kb in length and another that is much smaller in size.

The plasmid DNA, on the other hand, would be cut into one linear DNA fragment that is 5 kb in length.

Because the plasmid is circular, cutting it with a restriction enzyme would generate linear fragments.

The different-sized fragments are because EcoRI cuts DNA in a specific manner.

It cleaves the DNA double helix between the G and A nucleotides of the sequence 5'-GAATTC-3' on each strand.

The DNA fragments produced would have sticky ends.

The sticky ends are single-stranded DNA tails that overhang on each end of the DNA fragment produced as a result of the restriction enzyme digest.

Restriction enzymes cleave the phosphodiester bond in the DNA backbone at specific sites called restriction sites.

The restriction sites are palindromic sequences that are read the same way forward and backward.

Thus, the EcoRI restriction site reads 5'-GAATTC-3' on one strand and 3'-CTTAAG-5' on the complementary strand.

In conclusion, cutting both the 5 kb plasmid and the 5 kb linear DNA piece with EcoRI would generate different-sized linear DNA fragments with sticky ends.

The plasmid would generate one linear fragment, while the linear piece of DNA would generate two fragments of unequal sizes.

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Neutron cannot be accelerated in a magnetic field.

Magnetic field is the region of space near a magnetic material or moving charged particle with in which a magnetic force of magnetism act. It is a vector quantity.

Now lets check all options one by one

Option (A): Alpha particle

Alpha particles are charged particles in magnetic field so the particles deflected. Alpha particles are positively charged.

So it is incorrect option.

Option (B): Beta particle

Beta particles are charged particles in magnetic field so the particles deflected. Beta particles are negatively charged.

So it is incorrect option.

Option (C): Neutron

Neutrons does not have any charge so the particles are not deflected in magnetic field.

So it is correct option.

Option (D): Proton

Proton are charged particles in magnetic field so the particles deflected.

So it is incorrect option.

Thus, from the above conclusion we can say that Neutron cannot be accelerated in a magnetic field.

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Answer:

neutrons = mass number - atomic number

. = 39-19 =20

Answer:

option d

Explanation:

isotope means atoms with different mass no. 17 and 18 written on the left represent mass number

this is because atoms can differ in mass no.

At room temperature, the reaction with the fastest reaction rate would likely be option 3) N2(g) + 2O2(g) --> 2NO2. This is because this reaction involves the breaking of a relatively weak triple bond between the two nitrogen atoms, allowing them to form bonds with oxygen atoms to create NO2 molecules.

In contrast, options 1) and 2) involve the formation of relatively strong covalent bonds, which would require more energy to break and therefore have slower reaction rates. Option 4) involves the decomposition of KClO3, which requires a high activation energy to break the bond between the K and ClO3 ions, and so would also have a slower reaction rate than option 3).

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The enzyme's turnover number (kcat) is 0.89 min⁻¹.

To calculate the enzyme's turnover number (kcat), we need to know the amount of enzyme in moles, the amount of substrate in moles, and the time taken for the reaction.

Given:

Amount of enzyme = 15 µg

The enzyme's molecular weight, denoted as Mr, is 30,000 g/mol.

Amount of substrate = 60 µmol

Time = 3 min

First, we need to convert the amount of enzyme from micrograms (µg) to moles. We can use the molecular weight (Mr) to do this conversion:

Amount of enzyme in moles = (Amount of enzyme in µg) / (Mr)

Amount of enzyme in moles = (15 µg) / (30,000 g/mol)

Next, we can calculate the turnover number (kcat) using the formula:

kcat = (Amount of product formed) / (Amount of enzyme * Time)

Since the turnover number represents the number of substrate molecules converted to product per unit time by a single enzyme molecule, we need to convert the amount of substrate from micromoles (µmol) to moles:

Amount of substrate in moles = (Amount of substrate in µmol) / (1,000,000 µmol/mol)

Now we can calculate the turnover number:

kcat = (Amount of substrate in moles) / (Amount of enzyme in moles * Time)

kcat = (60 µmol / 1,000,000 µmol/mol) / (15 µg / (30,000 g/mol) * 3 min)

Simplifying the calculation:

kcat = (60 / 1,000,000) / (15 / 30,000 * 3)

kcat = 0.004 / (0.0015 * 3)

kcat = 0.004 / 0.0045

kcat = 0.89 min⁻¹

The enzyme's turnover number (kcat) is 0.89 min⁻¹, which means that each enzyme molecule can convert approximately 0.89 substrate molecules into product per minute.

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