Which of these is an example of a chemical change?
A. Breaking a tree branch
B. Burning a piece of wood
C. Melting ice
D. Dissolving salt in water
SMIT

Answers

Answer 1
D is the correct answer
Answer 2
It’s B i believe. All the other answers are physical changes and B is a irreversible change because it forms into a new substance like ash.

Related Questions

right answer got it right on edg 2021

Answers

Answer:

The answers is corresponding

Explanation:

Nice have a nice day

Answer:

I agree

Explanation:

yes

Four differences between the aorta and vena cava ?

Answers

Answer:

Aorta and vena cava are two main types of blood vessels attached to the heart. The main difference between aorta and vena cava is that aorta carries oxygenated blood whereas vena cava carries deoxygenated blood. Aorta is the main artery that leaves the heart through the left ventricle. It supplies oxygenated blood throughout the body. Two types of venae cavae supply blood to the right atrium of the heart. They are superior vena cava and inferior vena cava. Superior vena cava drains deoxygenated blood from the head, arms, and other upper parts of the body while inferior vena cava drains that from the lower parts of the body.

1. Aorta carries oxygenated blood while vena cava carries oxygenated blood.
2. Blood in the aorta moves at a higher pressure than that in the vena cava.
3. Aorta takes blood away from the heart while vena cava brings blood to the heart.
4. Vena cava have valves while aorta doesn’t.

I need to know what which weathering it is

Answers

Answer:

the answer is D

Explanation:

Rocks break down into smaller pieces through weathering. Rocks and sediment grinding against each other wear away surfaces. This type of weathering is called abrasion, and it happens as wind and water rush over rocks. The rocks become smoother as rough and jagged edges break off.

Which of the following best describes daily temperatures in deserts?a. hot during the day and cold at night b. hot during the day and warm at night cool during the day and very cold at night d. they depend upon the type of desert and its location Please select the best answer from the choices provided

Answers

a would be the best answer out of these choices because it’s closest to hot during the day and cool at night
A. Hot during the day and cool at night

I just need number one I need to fill in the blanks

Answers

Is there a word bank we can use

The phenotype frequency in a populatin changews after each generation which would most likely be cause this

Answers

The answer is: Competition between organisms.

how do you describe the shape of each sample of matter? do the ice cubes have a definite shape? how about the water? how about the vapor?

Answers

Answer:

Both no

Explanation:

be because it is liquid, they don't have fix shape

When a cell is deprived of oxygen, its lysosomes tend to burst and release their contents into the cell. As a result of this, that cell will Group of answer choices undergo cell division. recycle damaged organelles. produce replacement lysosomes. undergo self-digestion and die.

Answers

Answer:

The correct answer is - undergo self-digestion and die.

Explanation:

Lysosomes are cell organelle that is membrane-bound and has digestive enzymes in them. These cell organelle help in digesting cells that are worn out, ruptured cells deprived of oxygen by bursting themselves.

Its bursting nature also helps in digesting and killing antigens and microbes. It is a very essential cell organelle that helps in digesting and killing damage cell parts or cells.

When a cell is deprived of oxygen, its lysosomes tend to burst and release their contents into the cell, the cell will undergo self-digestion and die.

Explanation:

Lysosomes are cell organelles that are membrane-bound and contains digestive enzymes. These cell organelle help in breaking down cellular waste.  When the cell is deprived of oxygen they burst themselves and release their content. It is a very essential cell organelle that helps in digesting and killing damaged cell parts, microbes, antigens, or cells.

So, from this we can conclude that when a cell is deprived of oxygen, its lysosomes tend to burst and release their contents into the cell, the cell will undergo self-digestion and die.

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Describe & explain why the effect of temperature as a
limiting factor for photosynthesis is different to the
effects of Co2 and light intensity.​

Answers

Answer:

Although  the  light  dependent  reactions  of photosynthesis     are    not     affected     by changes in temperature, the light independent   reactions  of   photosynthesis are dependent  on  temperature.  They  are reactions  catalysed  by  enzymes.  As  the enzymes approach their optimum temperatures  the  overall  rate  increases.  It approximately   doubles   for   every   10°C increase    in    temperature.    Above    the optimum  temperature  the  rate  begins  to decrease, as enzymes are denatured, until it stops.

Explanation:

At  low  light  intensities,  as  light  intensity increases,the  rate of  the  light-dependent reaction,and   therefore   photosynthesis generally, increases proportionately (straight    line    relationship).    The    more photons  of  light  that  fall  on  a  leaf,  the greater     the     number     of     chlorophyll molecules  that  are  ionised  and  the  more ATP   and   NADPH   are   generated.   Lightdependent  reactions  use  light  energy  and so    are    not    affected    by    changes    in temperature.As light intensity is increased further, however, the rate of photosynthesis is eventually  limited by some other factor. So the rate plateaus. At very high light intensity, chlorophyll may be damaged and the rate drops steeply (not shown in the graph).Chlorophyll ais used in both photosystems. The wavelength of light is also important. PSI absorbs energy  most  efficiently  at  700  nm  and  PSII  at  680  nm.  Light  with  a  higher  proportion  of  energy concentrated in these wavelengths will produce a higher rate of photosynthesis.An    increase    in    the    carbon    dioxide concentrationincreases  the  rate  at  which carbon  is  incorporated  into  carbohydrate in  the  light-independent  reaction,  and  so the    rate    of    photosynthesis    generally increases until limited by another factor.As    it    is    normally    present    in    the atmosphere  at  very  low  concentrations (about  0.04%),  increasing  carbon  dioxide concentration  causes  a  rapid  rise  in  the rate  of  photosynthesis,  which  eventually plateaus   when   the   maximum   rate   of fixation is reached.

Fertilizer grade is the relative _________ in a bag of fertilizer.

Proportion

Percentage

Grade

Ratio​

Answers

Answer:

proportionhejenrn4nrrh4htj

ou have isolated a previously unstudied protein, identified its complete structure in detail, and determined that it catalyzes the breakdown of a large substrate. You notice it has two binding sites. One of these is large, apparently the bonding site for the large substrate; the other is small, possibly a binding site for a regulatory molecule. What do these findings tell you about the mechanism of this protein

Answers

Answer:

These findings tell us that possibly this protein has an enzymatic function, that is, it is an enzyme.

Its function can be catalytic as well as analytical.

The substrate binding site should be the largest, while the other regulatory site is the smallest.

Explanation:

This happens since hormones regulate their enzymatic activity through inhibitory sites.

They have another smaller binding site, where when an inhibitory molecule binds, it deforms the morphology of the protein causing it to no longer bind to its substrate at the binding site, therefore they inhibit the chemical reaction that is happening within the enzyme. both catalytic and analytical.

The volume of air in the lungs is controlled by the​

Answers

The diaphragm,

During inhalation, the diaphragm is contracted which increases the volume of the lung cavity. During exhalation, the diaphragm is relaxed which decreases the volume of the lung cavity

This Roman snail, this cuttlefish, and this mussel have similarities and differences in their body structures. What does the information about these structures tell you about the ancestors of these species

Answers

Complete question:

This Roman snail, this cuttlefish, and this mussel have similarities and

differences in their body structures. What does the information about these

structures tell you about the ancestors of these species?

a) None share an ancestor population because different species cannot share  an ancestor population. It is a coincidence that these species have some of  the same body structures.

b) The Roman snail and the cuttlefish share an ancestor population, but they  must not share an ancestor with mussels because mussels have no radula.

c) All three species share an ancestor population, but Roman snails and

cuttlefish share a more recent ancestor population. This is why they share

the radula structure.

d) We cannot make observations of ancestor populations from the past. It is

impossible to explain ancestors with only the information about the body

structures of different species.

Answer:

The correct answer is option C. All three species share an ancestor population, but Roman snails and  cuttlefish share a more recent ancestor population. This is why they share  the radula structure.

Explanation:

The three species belong to the mollusk phylum, and to the placophore group.

Each of them belongs to a different class.

The Roman snail belongs to the Gasteropod class, The cuttlefish belongs to the Cephalopod class, The mussel belongs to the Bivalve class.

The tree classes share a common ancestor from which all the placophores evolved. Among them, we can mention the monoplacophore, gasteropod, cephalopod, bivalve, and scaphopods. Three branches diverged from this common ancestor. The first one originated the monoplacophore. The second one originated the common ancestor of gastropods and cephalopods. And the third one originated the common ancestor of bivalves and scaphopods. The tree-mentioned species inherited the mantle and the radula from their foreign common ancestor. But later in time, individuals that originated bivalves lost the radulla. This is why the three species have a mantle, but only gastropods and cephalopods have a radula. When each of these classes evolved, they developed their own traits,

Gastropods → muscular foot used for moving  Cephalopods → pallial cavity for swimmingBivalves → byssal threads to attach to the rocks

You will find an image in the attached files that will help you understand this explanation.      

Which of the following items requires an internal
cooking temperature of 165 °F?
a. Pork chops
b. Injected meats
c. Raw Eggs
d. poultry

Answers

Answer and Explanation:

D. Poultry

There are three important temperatures to remember when cooking meat or eggs at home: Eggs and all ground meats must be cooked to 160°F; poultry and fowl to 165°F; and fresh meat steaks, chops and roasts to 145°F.

Answer:

D. poultry

Explanation:

NPK fertilizer are added in the soil to fulfill the need of ________​

Answers

Answer:

............. the need of _Nitrogen, phosphorus and potassium_

Explanation:

Each of these fundamental nutrients plays a key role in plant nutrition. ... It's also needed to help plants grow and develop normally. Phosphorus in commercial fertilizers comes from phosphate rock.

Hormones are chemical molecules produced by glands. Vasopressin is a hormone secreted by the cells of the hypothalamus, a part of the brain. The hormone regulates homeostasis through its effect on the kidney cells. Which statement is true based on this information?

Answers

Answer:

Hormones are chemical molecules produced by glands is true

Answer:

Hormones are chemical molecules produced by glands.

Explanation:

TRUE

what does the muscular system do for the stomach

Answers

Answer:

it helps digest the food and push the food down the gut track

Explanation:

¿Como se llaman las celulas segun el organo en el que estan?

Answers

Answer:

es tejido ... 2 ... es la ... opción correcta ...

Un grupo de células que tienen un origen común, una estructura similar y que realizan una función definida se denomina tejido. ... Por ejemplo, grupos de células óseas forman tejidos óseos y las células musculares forman tejido muscular. espero que te ayude

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Cell Processes and Transport: Mastery Test
4
Select the correct answer from each drop-down menu.
Sodium and potassium lons are essential for muscle contractions of the heart. The ions are transported using a pump, which obtains
energy by the breaking of
. This action requires the expense of energy. So, sodium and potassium ions are transported using
Reset
Next

Answers

Answer:

Cell

Explanation:

Sodium and potassium ions are essential for muscle contractions of the heart, and the ions are transported using a pump, which obtains energy from the breaking of ATP molecules, this action requires the expenditure of energy, so sodium and potassium ions are transported using active transport.

What is muscle contraction?

Sodium and potassium ions play a crucial role in muscle contractions, including those of the heart, and to maintain the appropriate concentration of these ions inside and outside the cell, the body uses a protein pump called the sodium-potassium pump, which is an active pump. It requires energy to move substances across cell membranes; the pump uses the energy released by the breakdown of ATP molecules to change its shape, transport the sodium and potassium ions across the membrane, and regulate the muscle contraction.

Hence, the ions are transported using a pump, which obtains energy from the breaking of ATP molecules, this action requires the expenditure of energy, so sodium and potassium ions are transported using active transport.

Learn more about the muscle contraction here.

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question is incomplete, complete question is below

Select the correct answer from each drop-down menu.

Sodium and potassium ions are essential for muscle contractions of the heart. The ions are transported using a pump, which obtains energy by the breaking of ----. This action requires the expense of energy. So, sodium and potassium ions are transported using---

ATP,

active transport.

One DNA molecule wound around molecules of protein makes up a(n).
o
A. tetrad
B. allele
O C. chromosome
O D. gamete

Pls help

Answers

Answer:

C. chromosome

Explanation:

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Climate zones result in specific vegetation types developing in a region. Which
climatic region is hot and wet all year round, resulting in tropical rainforest Vegetation?​

Answers

Tropical wet and dry climate is typically observed within the tropics. The tropics are two lines of latitude at 23.5° north and 23.5° south of the Equator. Land within this area obtains direct sunlight throughout most of the year.

Can someone help me with this for a brainly?

Answers

Reproduction is the second ability.

what is aphids? explain in easy words ​

Answers

They are little soft bodied insect. They suck the plant's nutritious liquid and if they are in large number, they can kill the plants.

Which list of elements is placed in order from most reactive to least reactive?
A. F, O, N, Ne
B. N, O, Ne, F
C. Ne, F, ON
D. N, Ne, O, F

Answers

A is the answer

The two reactive elements that you should remember are Flourine (F) and Francium (Fr), and only F is first for one answer.

what is substances in scientific methods​

Answers

Answer:

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.

Ella repeated Mendel's second set of experiments. She crossed two non-pure
tall pea plants and produced eight offspring. All of the offspring were tall. She
concluded that her experiment must be flawed.
What is wrong with Ella's reasoning?
A. Ella did not perform enough trials to evaluate the pattern in the
results.
O B. Ella did her experiment correctly. Mendel's experiments must have
been flawed.
C. Ella should have crossed two pure-breeding tall plants.
O
D. Ella did not accurately measure the height of the plants.

Answers

Answer:

A

Explanation:

Ella did not preform enough trials to evaluate the pattern in the results.

help pls *serious ppl only*

Answers

Answer:

6 for white parents, and 6 for black parents.

PLEASE HELP BRAINLIST GIVER HERE PLEASE HELPPPPPPPPPPP

Which of the following terms means "manmade"?
anthropology
naturopology
is anthropogenic
naturogenic

Answers

Answer:

Anthropology

Explanation:

this is the answer hope it helps you

Which process involves glucose reacting with oxygen to produce energy, carbon dioxide, and water?

Answers

Answer:

Respiration...................

Which scientific claim can be made? Songbirds numbers will increase due to the effects of climate change increasing global Temperatures

Answers

The scientific statement that can be made is that the imbalance in the food chain happened because of this fact, because the songbirds will harm other living beings by their growth.

What is an imbalance in the food chain?

Ecological imbalance occurs when some element (animal or plant) of an ecosystem is reduced in

quantityadded or subtracted.

This change can give rise to chain reactions and directly affect the functioning of the ecosystem.

With this information, we can conclude that the scientific statement that can be made is that the imbalance in the food chain happened because of this fact, because the songbirds will harm other living beings by their growth.

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is it legal for someone to be deducted pay for getting hurt on the job? Which one could NOT be the probability of an event occuring?A. 23B. 3/4C. 2.3D. 0Please help !!! Question 1(Multiple Choice Worth 3 points)The ancient Romans influenced the Enlightenment thinkers and the Founding Fathers. Which of the following events best reflects the republican government of ancient Rome? A town holds a meeting, and every citizen present votes to make a decision. People vote for representatives who will make decisions on their behalf. The president makes a speech about the need to protect rights for all citizens. National leaders decide to split government into three separate branches.Question 2(Multiple Choice Worth 3 points)If people believe that separation of powers is important, which of the following would not be a government they support? a government where responsibility is divided between groups of people a government where a single ruler, like a king, makes all the decisions a government with legislative, executive, and judicial branches a government where no one group of people has all the controlQuestion 3(Multiple Choice Worth 3 points)Which of the following ideas from the Baron de Montesquieu influenced the Founding Fathers? 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Separation of powers, because the means of government are the responsibilities of each part Limited government, because creating a limited government would only cause suffering Social contract, because people can agree to a bad government as easily as to a good one Natural law, because leaving a people to a state of nature would cause sufferingQuestion 10(Multiple Choice Worth 3 points)Read the quote. Then answer the question that follows.The judicial power ought to be distinct from both the legislative and executive, and independent upon both, that so it may be a check upon both, as both should be checks upon that. 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