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.
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what are sex hormones?why are they named so? state their function.
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.
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: _______
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
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?
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 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.
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.Learn more about cell membranes here: https://brainly.com/question/1768729
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Can someone please help me!!???
Explanation:
plant cell only
nucleuscell wallchloroplastgolgi apparatus cell membraneribosomeboth plant and animal cells
nucleuscell membraneribosomegolgi apparatuswhat is puberty explain it
11.
Asexual reproduction is absent in
(a) Amoeba
(b) Paramecium
(c) Plasmodium
(d) Roundworm
Explanation:
roundeorm is correct answer in this question
what is the volume of a cylinder if the height is 6 cm and the radius is 4 cm?
Answer:
v = πr²h
v = 3.142*4²*6
v = 301.71cm³
Explanation:
volume of the cylinder = πr²h
Which compound is produced during regeneration? PGA G3P RuBP rubisco
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!!
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.
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.
Differentiate between sub-cellular and acellular particles with examples
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.
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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.
Answer and Explanation:
You will find the complete answer and explanation in the attached file due to technical problems.
the process by which water boils into a steam is
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!!!!
Find the average of 124, 456, 788, 343. Write it as the closest whole number
describe the direction of dna replication and why that is important
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
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.
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.
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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.
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.
Answer:
Grass, meat / flesh
What is:
a) Metamorphosis
b) Photosynthesis
c) Plant cycle
d) Absorption
e) Menustration
f) Sex.
Accurate answers please.
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.
What is the monomer that’s makes up polysaccharides
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.
One side of your face is identical to the other side. You are _____. radially symmetrical asymmetrical bilaterally symmetrica
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.
If a force of 90 N is applied to each cart, which cart has the greatest
acceleration? *
1 point
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
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 :)
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)
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
What are two ways that society affects the progress of science?
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:
please answer the question
Answer:
B
Explanation:
Why is digestion of fats difficult as compared to that of other nutrients?
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.
According to the theory of plate tectonics,which is one feature that plates carry?
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 :).
What is absorbed into the blood stream in small intestine and large intestine
What is chromosomes?Write in brief about the structure of a chromosome.must include all points with explanations
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.
