From what sources did water arrive in Earth’s atmosphere?

Answers

Answer 1

However, in Earths First Billion years and over the past 4.5 billion years, the main source of water was from comets. We know that comets consist chiefly of chemical compounds that are either gases or liquids at earth-surface conditions: methane is one common component of comets and water is another.

hope it helps :)


Related Questions

what are sex hormones?why are they named so? state their function.

Answers

Answer:

Sex hormones or hormones of the reproductive organs are certain cells in the reproductive organs that produce hormones.

The testis produces testosterone,the male sex hormone,and the ovaries produces oestrogen and progesterone, the female sex hormones.

In a sexually mature male,testosterone influences sexual behaviour, and together with FSH,regulates sperm production in the seminiferous tubules of the testes.

Sexually matured females undergo a regular 4-week reproductive or menstrual cycle during which a mature egg is released.This cycle is regulated by oestrogen and progesterone. During pregnancy, progesterone inhibits egg production (ovulation),brings about the development of the placenta and prevents the uterus from contracting....I hope this answers your question... Thank you for the question.

Can someone please help me!!???

Answers

Explanation:

plant cell only

nucleuscell wallchloroplastgolgi apparatus cell membraneribosome

both plant and animal cells

nucleuscell membraneribosomegolgi apparatus

READ THE CHAPTERS 1, 2, 3, 4,5 FROM THE BOOK 1 JOHN IN YOUR BIBLE AND ANSWER THE FOLLOWING QUESTIONS: ¿Why did John write this epistle? (1:4, 2:1, 2:26) ¿In this epistle, what did John say that God is and begins with the letters "L" and "L"? (1: 5, 4: 8) What kind of person does Juan call a liar or one who lies? (1:10, 2: 4, 22) What did Juan say his hands had felt? (1: 1) What did John say that cleanses us from all sin? (1: 7) If a Christian sins, what should he do? (1: 9) Everything in the world, what does Juan say it is? (2:16) How did Juan call his readers? (2:12, 13) How does John define sin? (3: 4) What does John say about those who are born again? (3: 9) What Old Testament character does John use as an example of those who do not love one another? (3:12) What does Juan call the person who hates his brother? (3:15) How does John say that we should love? (3:18) Why should we not believe every spirit, but rather test the spirits if they are from God? (4: 1) Who or what is greater than the one in the world? (4: 4) What does John say about the commandments of God? (5: 4) Who are the three who bear witness on earth? (5:8) What are the two word phrases that John used at least five times in the last chapter of I John? (5: 2,15,18-20) What does John say we should guard against at the end of this epistle? (5:21)

Answers

Answer:

so1: he wrote that their joy may be complete,that they may not sin and also that they may not be deceived.

2:John says that God is light and love

3:so John calls a liar whomever says that they have not sinned or say they know Jesus but don't obey his commandments or denies that Jesus is the Christ

4:I guess is the manifestation of God's word through Jesus Christ

5: the blood of Jesus cleanses us from all sins

6:a Christian should confess their sins

7:everything of this world,lust and pride,are not of God but of this world

8:he called them little children and father's

9:he defines sin as lawlessness

10:he says that none of them commit sin but God's nature abides in the person therefore for those born of him can't commit sin

11:he used Cain who murdered his brother

12:he calls them a murderer

13:he says that we should love in deed and I'm truth

14: because of the presence of many false prophets in the world

Answer:

what he said.how did you type all of that in one sitting

If a force of 90 N is applied to each cart, which cart has the greatest
acceleration? *
1 point​

Answers

Answer: Cart 1 would have the greatest acceleration. It weights less and if you apply force it will go faster than other carts.

Explanation:

(at least so I think, don't shame me if I am wrong)

what is a warning safety sign​

Answers

Answer:

Hey there!

A warning safety sign is a sign that warns you that there may be a safety hazard around you.

Let me know if this helps :)

please answer the question​

Answers

Answer:

B

Explanation:

b! hopefully that helps haha

describe the direction of dna replication and why that is important

Answers

Answer: Roles of DNA polymerases and other replication enzymes. ... which require a template and a primer (starter) and synthesize DNA in the 5' to 3' direction. ... Topoisomerase also plays an important maintenance role during DNA replication.

Explanation:

hard to explain

Find the average of 124, 456, 788, 343. Write it as the closest whole number

Answers

Average =
(124+456+788+343) / 4
= 1711 / 4
= 427.75
= 428

If the number of cigarettes smoked increases, then the risk for lung cancer increases. Independent variable: _______ Dependent variable: _______ If the number of sharks swimming in a coastal region increases, then the number of shark attacks on humans will also increase. Independent variable: _______ Dependent variable: _______ If the amount of milk a person drinks increases, the strength of his or her bones will stay the same. Independent variable: _______ Dependent variable: _______

Answers

Complete Question:

Part A: Identifying Variables

Read the following hypotheses and identify the variables.

If the number of cigarettes smoked increases, then the risk for lung cancer increases.

Independent variable: _______

Dependent variable: _______

If the number of sharks swimming in a coastal region increases, then the number of shark attacks on humans will also increase.

Independent variable: _______

Dependent variable: _______

If the amount of milk a person drinks increases, the strength of his or her bones will stay the same.

Independent variable: _______

Dependent variable: _______

Answer/Explanation:

Dependent variables are variables that is dependent on the independent variables. That is, it is the variable that changes as the independent variable changes.

Depedent variable is the main interest if a researcher. It is the variable that is measured in a research work.

In the above given hypotheses, the dependent and independent variables are shown below:

1. "risk for lung cancer" is dependent on the "number of cigarettes smoked".

"Risk for lung cancer" => dependent variable

Number of cigarettes => independent variable

2. "number of shark attacks on humans" is dependent on "number of sharks swimming".

Dependent variable => number of shark attacks on humans

Independent variable => number of sharks swimming

3. Dependent variable => strength of bone

Independent variable => amount of milk a person drinks

Answer:

Lab: Heart Rate  

Part A: Identifying Variables

The dependent variable happens as a result of values/changes associated with the independent variable.

Independent variable: number of cigarettes smoked

Dependent variable: risk for lung cancer

Independent variable: number of sharks swimming in a coastal region

Dependent variable: number of shark attacks on humans

Independent variable: amount of milk a person drinks

Dependent variable: the strength of his or her bones

Part B: Heart Rate

Hypothesis: If I hold my breath for 30 seconds, then my heart rate will

(choose 1) increase/decrease.

Independent variable: holding my breath

Dependent variable: heart rate

Part C:

The heart rate decreases because oxygen exchange in the lungs decreases.

This depends on what you chose for heart rate in the hypothesis. If you said the heart rate decreases after holding your breath, and the results showed the heart rate decreased, then the hypothesis is supported. If you said the heart rate decreases after holding your breath, and the results showed the heart rate increased, then you refuted the hypothesis.

Heart rate can change due to an increase or decrease in activity, moving positions such as sitting and standing, and emotions.

Example: Increase in activity—jumping jacks

Hypothesis: If I do five jumping jacks, then my heart rate will increase.

Test hypothesis. You can use the average resting heart rate from the previous experiment. If you do an experiment with an increase in physical activity like jumping jacks, then your data will reflect an increase in heart rate because the body requires more energy, which requires more oxygen, increasing the overall flow of blood in the body.

Support or refute the hypothesis based on the results. The hypothesis is supported if it aligns with the observed results. The hypothesis is refuted if the results don’t match the statement based on the variables.

Testing more than one variable at a time makes it difficult to interpret the results and support or refute the hypothesis. With one variable, the results can be associated with changes to that variable. To get the most reliable data to support or refute a hypothesis, an experiment should be completed several times to see if the results show the same trends.  

 

 

Explanation:

Penn Foster

What is chromosomes?Write in brief about the structure of a chromosome.must include all points with explanations

Answers

Answer:

Please find the detailed explanation below

Explanation:

A chromosome is thread-like material that carries the long strands of the genetic material (DNA), which in turn carries the gene. The chromosome is the found form of nuclear material in the nucleus.

Due to the long nature of the DNA molecule, they cannot fit into the cell. Hence, to ensure they fit, the cell wraps the DNA molecule around a set of protein called HISTONE proteins to form a NUCLEOSOME. Each nucleosome is made up of DNA coiled around a set of 8 proteins called HISTONE OCTAMER. The nucleosome structure becomes more compacted and further wound around the histone to form a CHROMATIN. This chromatin then undergoes condensation to form the visible CHROMOSOME structure.

Fomites are Group of answer choices insects that transmit pathogens from an infected host to a non infected host. animal sources for human pathogens. inanimate objects involved in the indirect contact transmission of pathogens. fecal material from infected hosts. silent carriers of infectious diseases.

Answers

Answer:

Fomites are inanimate objects involved in the indirect contact transmission of pathogens.

Explanation:

Fomites are inanimate objects involved in the indirect contact transmission of pathogens. These objects include a whole range of items mostly found in indoor environments. When pathogens  such as viruses and bacteria come in contact with these objects through various human and animal activities such as sneezing or coughing, use of toilets etc; these pathogens remain active on these objects and can then cause disease when others come in contact with these objects.

Common fomites in the home include toilet seats and handles, doorknobs, kitchentops, bed coverings , mobile phones, light switches as well as as toys. In offices, door handles, stairway railings as well as wring materials are common fomites. Especially concerning is the issue of disease transmission by fomites in healthcare facilities since there is constant exposure of surfaces and equipments to various pathogens.

To help prevent the spread of diseases by fomites, regular handwashing and disinfection of commonly touched surfaces is required.

Which compound is produced during regeneration? PGA G3P RuBP rubisco

Answers

Answer:

RuBP is the answers

Answer:

C) RuBP is the answer on edge.

Explanation:

just made a 100%, if you ever have a question i´m glad to help!

i need 4 more brainlest to get expert it would mean a lot if i could have the brainlest, please and thank you!!

Differentiate between sub-cellular and acellular particles with examples

Answers

Answer:

Explanation:

Sub-cellular particles are particles smaller than the living cell and are found suspended in the cytosol (of a cell) like the nucleus, golgi complex and the mitochondria.

While acellular particles/organisms are particles that do not have a cell like the virsues, viroids and prions. They are not alive/inactive outside a living environment but become active immediately they are inside a living environment (like a cell).

Sub-cellular particles are structures that are found within a cell. These structures perform specific functions and are essential for the cell to carry out its biological processes.

Examples of sub-cellular particles include organelles such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and lysosomes. These structures are composed of both proteins and lipids and are enclosed by a membrane.

Acellular particles, on the other hand, are particles that do not possess a cellular structure and are not alive. These particles are much smaller than cells and are unable to carry out any metabolic processes.

Examples of acellular particles include viruses, prions, and viroids. These particles are composed of either DNA or RNA and can replicate themselves only within a host cell. They do not have their own metabolism and rely on the host cell for replication and survival.

To learn more about particles, refer below:

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What are two ways that society affects the progress of science?

Answers

Answer:

Technology usually affects society more directly than science because it solves practical problems and serves human needs (and may create new problems and needs). In contrast, science affects society mainly by stimulating and satisfying people's curiosity and occasionally by enlarging or challenging.

Explanation:

Look at the DNA sequence (1st Picture) Which sequence shows a substitution mutation? (2nd Picture)

Also, can you explain how you got the correct answer?

Answers

Answer:

Sequence A

CGTTACTGCAAT to CGTGACTGCAAT

Explanation:

Mutation refers to any change, whether big or small, that occurs in the nucleotide sequence of a DNA/gene. This change can either be caused by replicational errors or induced by mutagens. Mutation can be of different types depending on the effects on the affected organism (mutant).

A substitution mutation is a kind of mutation in which one or more nucleotide base is replaced by another in a sequence. This is the case here as the

original sequence: CGTTACTGCAAT

Mutated sequence: CGTGACTGCAAT

The fourth base, T has been replaced by G in the upper strand of the DNA sequence.

Gene Expression Quick Check

Explanation:

1.DNA and RNA hold the code to create proteins that are the key to gene expression.

2.Endoplasmic Reticulum

3.CGTTACTGCAAT to CGTGACTGCAAT

4.The proteins are expressed differently in each cell.

5.mRNA is translated into amino acids.

What is the monomer that’s makes up polysaccharides

Answers

Answer:

glucose

Explanation:

Polysaccharides are long chains of monosaccharides linked by glycosidic bonds. Three important polysaccharides, starch, glycogen, and cellulose, are composed of glucose. Starch and glycogen serve as short-term energy stores in plants and animals, respectively. The glucose monomers are linked by α glycosidic bonds.

Which of the following is an example of population growth? Group of answer choices the average weight of Americans has increased substantially in the past decade. tropical fish have been found in more northern waters than their usual habitat. the number of people in a town has increased by 25% in the past 5 years. the number of butterflies in a region have stayed the same from 1950-2010.

Answers

Answer:

the number of people in a town has increased by 25% in the past 5 years.

Explanation:

Hope it helps.

using scientific terms, describe the feeding relationships between thr organisms in the following food chain.

grass > grasshopper > field mouse > owl

5000kJ of energy is available in the grass.

Answers

Answer:

Grass, meat / flesh

what is the volume of a cylinder if the height is 6 cm and the radius is 4 cm?​

Answers

Answer:

v = πr²h

v = 3.142*4²*6

v = 301.71cm³

Explanation:

volume of the cylinder = πr²h

What is absorbed into the blood stream in small intestine and large intestine

Answers

Small intestine absorbs water and nutrients into the bloodstream and moves waste products into the large intestine

11.
Asexual reproduction is absent in
(a) Amoeba
(b) Paramecium
(c) Plasmodium
(d) Roundworm​

Answers

Explanation:

roundeorm is correct answer in this question

what is puberty explain it​

Answers

Puberty is when your body matures, you start to grow hair in new places, your voice starts to crack, you start to have weird urges, you also (if you are male) start to get an erection, females start to get “wet” (or they feel tingly is the best way I can explain)
Puberty is a transitional period between childhood and adulthood, during which a growth spurt occurs, secondary sexual characteristics appear, fertility is achieved, and profound psychological changes take place

One side of your face is identical to the other side. You are _____. radially symmetrical asymmetrical bilaterally symmetrica

Answers

Answer:

For the answer to the question above, asking if One side of your face is identical to the other side. Then you are bilaterally symmetrical.

I hope my answer helped you. Feel free to ask more questions. Have a nice day!

Explanation:

Answer:

Bilaterally symmetrical

Explanation:

From my understanding, radially symmetrical means identical halves around the central axis.

Asymmetrical means not symmetrical at all

Leaving us with Bilaterally symmetrical, which is basically identical parts but as right and left.

That's the best i can explain so there is a diagram to help understand.

According to the theory of plate tectonics,which is one feature that plates carry?

Answers

Answer:

According to the theory of plate tectonics, seafloor features do plates carry.

Explanation:

There are many rough spots which can no longer hold, the sudden release of the built-up motion releases, and the sudden movement under the sea floor causes a submarine earthquake in the area.

Answer:

seafloor

Explanation :).

Why is digestion of fats difficult as compared to that of other nutrients?

Answers

This is because fats are insoluble in water and therefore are more difficult to digest than any other nutrients. They also present as large globules.

Hope that helped!!! k

Answer:

Fats take longer time to digest than carbohydrates. Fats can't be digested easily as its insoluble in water and are presented as large globules. The bile juice that gets secreted breaks down the fat from bigger droplets into smaller ones.

Match the following: Hypoxia. A. May be cuased by tumors, mucus, or inflammatory material.B. May be caused by left sided heart failure.C. Huge amounts of harmful free radicals cause profound CNS disturbances, coma, and death D. Is difficult to identify in dark-skinned individuals.

Answers

Answer:

it is c

Explanation:

In order to determine whether you have hypoxia, your doctor will need to check the amount of oxygen in your blood. Therefore, option (C) is correct.

What do you mean by hypoxia?

Hypoxia is low levels of oxygen in your body tissues. It causes symptoms like confusion, restlessness, difficulty breathing, rapid heart rate, and bluish skin.

Moreover, hypoxia is a state in which oxygen is not available in sufficient amounts at the tissue level to maintain adequate homeostasis; this can result from inadequate oxygen delivery to the tissues either due to low blood supply or low oxygen content in the blood (hypoxemia).

Hence, heart and lung function issues can lead to five categories of conditions that cause hypoxemia: ventilation-perfusion (V/Q) mismatch, diffusion impairment, hypoventilation, low environmental oxygen and right-to-left shunting.

Learn more about hypoxia:

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A testcross involves an individual exhibiting the dominant phenotype but an unknown genotype being crossed with an individual that has a(n) ___________ genotype.

Answers

Answer and Explanation:

You will find the complete answer and explanation in the attached file due to technical problems.

What evidence supported the Davson-Danielli model for the cell membrane?
A. Electron micrograph pictures showing a blue center surrounded by 2 layers.
B. Presence of proteins that was unaccounted for.
C. Diffusion models predicted fluid flowing into the cell at a rate consistent with their model.
D. Electron micrograph pictures showing 2 separate layers.

Answers

The answer is A

Electron micrograph pictures showing a blue center surrounded by 2 layers.

A. Electron micrograph pictures showing a blue center surrounded by 2 layers.

What is the importance of cell membranes?

The plasma membrane, or the cellular membrane, gives safety for a mobile. It also gives a fixed surrounding in the mobile. And that membrane has numerous distinctive features. One is to move nutrients into the cell and additionally transport toxic materials out of the cell.

What are the functions of the cell membrane?

identification, communication, regulation of solute exchange through the membrane,isolation of the cytoplasm from the external environment.

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the process by which water boils into a steam is​

Answers

Answer:

Hey hey your answer is evaporation

Answer:

Your answer is evaporation.

Explanation:

The rate of change of water into water vapour is called evaporation. For example, heating if water into water vapour.

Hope this helps....

Have a nice day!!!!

What is:
a) Metamorphosis
b) Photosynthesis
c) Plant cycle
d) Absorption
e) Menustration
f) Sex.
Accurate answers please.​

Answers

Answer:

a) Metamorphosis is a process by which an animal develops after birth including change in body structure.

b) Photosynthesis: this is the process used by plants to make their food.

c) Plant cycle: the generation and process/the adopted way in which plants grow.

d) Absorption is the ability for a light object/surface to be able to soak/take in something.

e) This is when a woman sees her monthly cycle/discharge of blood in a woman.(stage of puberty).

f) Sex is when someone have sexual intercourse/gender.

Explanation:

Hope they help.

Other Questions
A long bar slides on two contact points and is in motion with velocity . A steady, uniform, magnetic field B is present. The induced current through resistor R is: 2. Marci bought 6 shirts at Old Navy. Her subtotal(before tax) was $73.50. If each shirt was the sameprice, how much did each shirt cost? These cones are similar. Find the surfacearea of the smaller cone. Round to thenearest tenth. A regulator equipped with a conventional alternate-air-source second stage:________ a) Is the among the most widely used and readily understood type of alternate air source. b) Limits the receiver to using only the alternate-air-source second stage. c) Allows the donor to give either second stage to an out-of-air diver. d) Both the first and third answers are correct. 4. Suppose you make $12 an hour as a lifeguard at the community pool during the summer. Let hrepresent the number of hours you work in a week. Write an expression that represents theamount of money you earn in a week and evaluate it for ) = 15.O 12.; $180O 12 + 1; $277(12.1); $1,260O5(127); $900 What is the goal of the scientific method Describe the intermolecular interaction of the surface carboxylate groups of a micelle and the surrounding water. The energy E (in ergs) released by an earthquake is approximated by log E= 11.8 + 1.5M. Where M is the magnitude of the earthquake. What is the energy released by the 1906 San Francisco quake, which measured 8.3 on the Richter scale? This energy, it is estimated, would be sufficient to provide the entire world's food requirements for a day. Answer in ergs. A textbook is an example of a_____ Source (primary/secondary) Question 15FLAG QUESTIONYou bought 9.5 pounds of chicken for $12.73. Find the cost of one pound of chicken. Determine the next possible thickness of the film (in nm) that will provide the proper destructive interference. The index of refraction of the glass is 1.58 and the index of refraction of the film material is 1.48. The major components of a time series are all of the following EXCEPT: trend. cycles. random variations. seasonality. inflation. A golfer hits a 42 g ball, which comes down on a tree root and bounces straight up with an initial speed of 15.6 m/s. Determine the height the ball will rise after the bounce. Show all your work. what dose a point represents: a) line segment b) a location c) intersection of a plane d) none of the above Independent and Dependent Variable PracticeDIRECTIONS: Read the information about each experiment and record the independent variable (IV) and dependent variable (DV). Then write a hypothesis for each experiment. Be sure to use an if, then, because statement.Will an egg float higher in water with more salt?IV:DV:Hypothesis:Willy and Billy want to know if stretching a rubber band at different lengths affects how far the rubber band will fly. They will use centimeters for all measurements.IV:DV:Hypothesis: Will a paper airplane with longer wings fly farther than shorter wings?IV:DV:Hypothesis:Will a plant grow higher with more light? IV:DV:Hypothesis:Milly and Bob want to know if the amount of baking soda added to vinegar will affect the height a rocket will launch. They will measure the baking soda in milliliters. They will measure the height of the rocket launch in meters. IV:DV:Hypothesis:Carrie and Heather wanted to know if the size of a coin will affect the number of drops of water it can hold. So they use a dropper to place water on a quarter, nickel, and penny. IV:DV:Hypothesis:I wonder if the amount of studying I complete has an effect on my science test scores? IV:DV:Hypothesis: Consider the case of Purple Panda Pharmaceuticals: Next year, Purple Panda is expected to earn an EBIT of $2,000,000, and to pay a federal-plus-state tax rate of 30%. It also expects to make $500,000 in new capital expenditures to support this level of business activity, as well as $35,000 in additional net operating working capital (NOWC). Given these expectations, it is reasonable to conclude that next year Purple Panda will generate an annual free cash flow (FCF) of (rounded to the nearest whole dollar). What is the average rate of change from x = 0 to x = 18? If all glucose is normally reabsorbed in the proximal tubule of the nephron, why do people with diabetes have glucose in their urine Sarah has $30,000 in her bank account today. Her grand-father has opened this account for her 15 years ago when she was born. Calculate the money that was deposited in the account 15 years ago if money has earned 3.5% p.a. compounded monthly through all these years. What happened during the Boston Massacre