Biology High School

Where did the water on Earth come from?

A. mainly volcanic eruptions
B. probably from a combination of sources
C. probably from the nebula that formed the planet
D. mainly comets and asteroids

!SCIENCE!

Answers

Answer 1
D, the correct one is D. that is what is thought in most schools.
Answer 2
I think the answer to this is C but it could also be D. There are theories out that that water came from comets and asteroids or nebula that formed the planet. 

Related Questions

Open reduction for a fracture uses __________ to align the ends of the bone.

Answers

Answer:

Surgery

Explanation:

In treatment of fractured bones through open fracture methodology, the care provider or the surgeon creates an opening to expose the bone and hence carry out its treatment. Open fractures involve surgery and hence they are not treated in emergency ward like other fractures instead they are treated in an operating room through an incision. In open fractures the bone pierces the skin and hence its realignment require treatment through operation only

Final answer:

Open reduction for a fracture requires surgical intervention to align the bone ends, in contrast to closed reduction which uses manual manipulation without surgery. It is necessary for more complex fractures, leading to the formation of a callus which facilitates the healing and remodeling of the bone.

Explanation:

Open reduction for a fracture uses surgical intervention to align the ends of the bone. Unlike closed reduction, which relies on manual manipulation of the bone without surgery, open reduction involves making an incision to directly access the broken bone and properly align it. This surgical procedure is particularly necessary for complicated fractures, such as those that are severely misaligned or where bone fragments need to be repositioned internally.

Common types of fractures include transverse, oblique, spiral, comminuted, and greenstick among others. After a bone is set, either through open reduction or closed, a healing process begins leading to the formation of a callus that knits the bone ends together. The body's natural bone cells, osteoclasts and osteoblasts, work to resorb dead bone and create new bone tissue within the callus until the healing is complete and the bone remodeled.

Although the domain archaea contains many acidophilic organisms, there are still many others within the domain that grow well in environments with a neutral ph. although the domain archaea contains many acidophilic organisms, there are still many others within the domain that grow well in environments with a neutral ph.

a. True

b. False

Answers

The correct answer is:  [A]:  "True" . 
__________________________________________
This is true. Although the domain archaea contains many acidophilic organisms, there are still many others within the domain that grow well in environments with a neutral ph. although the domain archaea contains many acidophilic organisms, there are still many others within the domain that grow well in environments with a neutral ph.

Which effect is most likely caused by nondisjunction during meiosis?

A. an extra chromosome

B. an increase in nuclei

C. increased survival benefits from traits

D. only two types of nitrogenous bases

Answers

The answer to the question would be an extra chromosome.

Meiosis is a type of cell division which all sexually reproducing diploid eukaryotes have. It is finished in the process of fertilization, resulting in a zygote. The chromosome number is divided by half in this process, resulting in four haploid cells which all differ genetically from the parent cells. After DNA replication, two cell divisions take place, referred to as Meiosis I and Meiosis II. The first cell division generates the diversity of genetic information through the process of crossing over and random positioning of homologous chromosomes. The number of chromosomes is here reduces from diploid (2n) to haploid (n). 

In order to achieve genetic diversity, the homologous chromosomes need to separate in the first meiosis, and then the sister chromatids need to separate in the second meiosis, which brings us to four haploid cells. Nondisjunction is an error in this process that can happen in either the separation of homologous chromosomes, or the separation of sister chromatids. The result of nondisjunction in a chromosome imbalance, so a cell that has been affected by nondisjunction is an aneuploid cell. There are different types of aneuploidy, like monosomy (the loss of one chromosome), trisomy (the gaining of one chromosome) and different syndromes can occur as a result of this erroneous process. 

Out of the answers you provided, gaining an extra chromosome would be the answer, but a single chromosome loss can also be the result of nondisjunction.

What is it called when you carefully look at an object or a process?

Answers

Analyse

To examine something methodically to interpret or explain it.

2. Comparative biochemistry is the study of similarities and differences in _______ among organisms.
A. development
B. homologous structures
C. DNA sequences
D. vestigial structures
My guess is DNA sequences,

Answers

C. DNA sequences. Comparative biochemistry is used to study the similarities and differences between living organisms. Different organism posses DNA which are made up of similar elements. Comparative biochemistry study will reveal how thes molecules differ in expression.

What types of activities are going on in a cell during interphase?

Answers

During the interphase, the cells grows, carries out normal functions and duplicate its DNA. So we have to two chomosomes with two chromatids in each chromosome.

There are the phase G1, G, and S phase. 

Hope this helps !

Photon

Which term describes the movement of alleles into and out of a population?

genetic drift

overproduction

recombination

gene flow

Answers

Gene flow is the movement of alleles into and out of a population

Gene flow           is the answer

Describe the structure of the neuron and explain how its structure relates to the detection, generation, transmission and integration of signal information

Answers

A neuron has 3 basic parts; namely the dendrites, the cell body or the soma, and the axon. Axons are "coated" by a myelin sheath as an insulator to improve conduction velocity. 

The detection of neural impulses occurs at the dendrites which receive the impulses from another neuron. There will be generation of the message at the base of the axon called the axon hillock. Transmission will occur as the synaptic vesicles are stimulated to fuse with the terminal axon cell membrane where their contents are freed in the synapse. 

Integration happens in the brain where all responses are integrated into a sensory reaction or a motor response.

the ocean and the atmosphere serve as long term stroage areas for carbon and other nutreints.What are these strorage areas called..?

A) Reservoirs
B)Fossil Fuels
C)Biostorages
D)Compounds

Answers

The correct answer is:  [A]:  "reservoirs" .
___________________________________________________________

Methylphenidate is prescribed for a 6-year-old boy with the diagnosis of attention deficit–hyperactivity disorder (adhd). the nurse teaches the father about safe medication administration and concludes that the instructions have been understood when the father says that he should administer it at which time?

Answers

Methylphenidate is a cerebral stimulant that can interfere with sleep, it should therefore not be administered within 6 hours of bedtime. It may also cause nausea, anorexia (eating disorder), and dry mouth, which interfere with appetite and adequate food intake; therefore it should be administered after the child has taken breakfast. It should be taken exactly as prescribed by the nurse or specialists and not as a needed basis.

Why are there no more than four or five links in a food chain?

Answers

At that point in time there are no larger predators

Hope I helped!

Let me know if you need anything else!

~ Zoe

Answer:

It is rare to find food chains that have more than four or five links

Explanation:

significant energy is lost between each successive trophic level.

because the loss of energy limits length of food chain are only four links in the food chain

Hope this helps you.

How is the definition of "lipid" different from the types of definitions used for other biomolecules, such as amino acids, nucleic acids, and proteins?

Answers

The term "lipid" does not specify a particular chemical structure. Whereas one can write a general formula for an amino acid, nucleic acid, or protein, lipids are much more chemically diverse. Compounds are categorized as lipids based on their greater solubility in organic solvents than in water.
Final answer:

Lipids are defined by their solubility properties rather than specific functional groups, encompassing a range of nonpolar hydrophobic molecules, unlike proteins and nucleic acids, which have more specific structural criteria.

Explanation:

The definition of "lipid" differs from other biomolecules like amino acids, nucleic acids, and proteins because lipids are defined not by the presence of specific functional groups but by their physical property of solubility. A lipid is a broad category, which includes a diverse range of hydrophobic or nonpolar molecules that are more soluble in nonpolar solvents like ether or chloroform than in water. This encompasses various molecules such as triglycerides, phospholipids, and steroids. The criterion for a molecule to be classified as a lipid is based on its solubility characteristics rather than a specific structural formula. For example, triglycerides are formed by a glycerol molecule bonded to three fatty acid molecules and are the main component of body fat in humans and other animals.

Proteins, on the other hand, are defined by the presence of one or more long chains of amino acids. Amino acids and nucleic acids have well-defined structures involving specific atoms in certain arrangements, making the classification of these molecules less ambiguous compared to lipids. Lipids play various roles such as energy storage, structural components of cell membranes, and as signaling molecules.

People build a dam to create a reservoir that supplies water a nearby city needs. Describe two ways that water moves through Earth’s atmosphere in the water cycle

Answers

Transpiration, evaporation.
Hi I believe it is transpiration and evaporation

Why is it important to know what checmicals are producded in the body as decomposition proceeds?

Answers

Measuring and understanding the chemicals that are released during decomposition can be studied and the effects of these chemicals can be measured. Effects on the environment (soil composition, water quality, animal health) can all be affected by a decomposing body. When scientists are able to understand these effects, they can better prepare and prevent the harmful effects while reaping the benefits that could be useful.

The organism shown is frequently used in genetic engineering because

Answers

Is there supposed to be a picture?
I've did this question on the quiz and it is It has a simple, circular chromosomes. 

thanks your answer

This is an observable trait of an organism that can mask the recessive trait.

Answers

This law states an organism has two different alleles for a trait and the allele that is expressed in the phenotype, masking the expression of the other allele,is said to be dominant. The allele whose expression is masked is said to be recessive.

Answer:

It is an Dominant Trait.

     I hope this helps you very much!

Explanation:

Which agent of metamorphism can cause the overall composition of rock to change?

heat energy
pressure
hydrothermal solutions

Answers

Hello,

Here is your answer:

The proper answer tot his question is option B "pressure". That's because pressure can cause heat therefore allow the rock to form.

Your answer B.

If founded anymore help feel free to ask me!

Hope this helps!

the answer is a

hope it helps

The fourth reaction involving Gly-4 ( aldolase) is an especially important reaction in glycolysis. Why is this?

Answers

Glycolysis is the metabolic process of converting glucose into a pyruvate. It serves as a foundation for the two cellular respiration namely the aerobic and anaerobic respiration. It has four reactions namely, hexokinase, glucose-6 pshospahate isomerase, phosphofructokinase (PFK) and aldolase.

Aldolase or Glycolysis reaction 4 is significant because it splits the fructose1,6 biphosphonate into glyceraldehyde-3-phosphate (GAP) and dihydroxyacetone phosphate (DHAP).

Nitrogen-fixing bacteria are important because...

A. They turn nitrogen from the air into nitrogen compounds in the soil.
B. They are essential for plants being able to carry out photosynthesis.
C. They break up dead animals in the soil.
D. They release nitrogen from the soil into the atmosphere.

Answers

The answer is , A , hope this helped!

The medulla oblongata, the pons and the midbrain make up the brainstem.
a. True
b. False

Answers

That is true. The medulla oblongata, the pons and the midbrain make up the brainstem.

The animal phylum most like the protists that gave rise to the animal kingdom is _____. see concept 33.1 (page 688) view available hint(s) hint 1. consider which of these exhibits the least complexity and is the "basal group" of the animal kingdom. the animal phylum most like the protists that gave rise to the animal kingdom is _____. see concept 33.1 (page 688) ctenophora porifera cnidaria lycophyta echinodermata

Answers

The answer is Porifera. This is supported by the evidences such as the lack of true tissue in sponges and the close similarity between choanocytes and choanoflagellates. Phylum porifera majorly comprises of sponges which are simple invertebrates animals that live in aquatic habitats. Most of the sponges are marine, however, Some species may live in freshwater lakes and streams. 

which of the following poses the greatest threat to fish populations in the galapagos islands?

Answers

Overfishing poses the greatest threats to the fish population in the Galapagos Islands. It is important that the fishing industry be as maintainable as possible. For fishing to be sustainable, fishermen should be able to catch enough fish to make a living from, but not to catch so many fish (commercial fishing) that the fish population is negatively affected. Catching too many fish is called overfishing. An example would be to fish for in demand endangered species which are in the protected area of the Galapagos Reserve.  Without scientific research, it can be hard for fishermen to know if they are overfishing in an area.

A harmful mutation can be caused by factors in the environment. True or False?

Answers

Final answer:

Environmental factors known as mutagens, which include radiation and chemicals, can indeed cause harmful mutations. These mutations can lead to diseases like cancer if the DNA damage they cause is not repaired.

Explanation:

True, a harmful mutation can indeed be caused by factors in the environment. These environmental factors are known as mutagens, which include various types of radiation (like X-rays, ultraviolet light, and nuclear radiation), chemicals (such as those inhaled by smoking), and infectious agents. While it's important to recognize that not all mutations arise from environmental exposure—some are spontaneous, occurring without external influence—mutagens can increase the mutation rate by damaging the DNA. If this damage is not properly repaired, it can lead to mutations that may be harmful, such as those that contribute to the development of cancer.

There are robust DNA repair mechanisms in place to correct such damage, but these are not always successful, leading to a mutation. An example of a harmful mutation is one that leads to the development of cancer, whereas a beneficial mutation might provide resistance to a particular disease. Notably, while induced mutations are often thought of in the context of negative outcomes like cancer, mutations in general, whether induced or spontaneous, are a fundamental part of the evolutionary process.

This type of graph represents _______ collected from the ________ of bird number

Answers

data;observation
You collect the data from your observations

Before cell reproduction or mitosis can proceed, what is the correct sequence of steps that must first occur?
a.chromosome replication, chromosome checking and repair, growth
b.growth of cytoplasm, duplication of cellular organelles, chromosome replication
c.replication of chromosomes, growth, duplication of cellular contents and organelles
d.growth, duplication of cell organelles, chromosome replication, repair of chromosomal errors

Answers

D.growth, duplication of cell organelles, chromosome replication, repair of chromosomal errors

Answer:

________________________________________________________________________________-

Explanation:

______

why are there seasons
A. earth revolves around the sun
B. earth rotates on its axis
C. earths axis titled
D.the moon revolves around earth

Answers

The stations are due to the inclination of the axis of rotation of the Earth with respect to the plane of its orbit with respect to the sun, which means that some regions receive different amounts of sunlight depending on the time of year.

The Earth rotates around its axis, this rotating movement is called rotation.

The Earth also revolves around the sun, this movement is called revolution.

The answer is: A. The earth revolves around the sun, B. The earth revolves around its axis.

Answer:

Earth's axis is tilted.

Explanation: I'm confident in my answer

In which stage of growth do plants rest or grow very little?

Answers

In the Dormant stage 

The nurse assures a breast-feeding mother that one way she will know that her infant is getting an adequate supply of breast milk is if the infant gains weight. what behavior does the infant exhibit if an adequate amount of milk is being ingested

Answers

Answer: 


Voids six or more times a day.

In ocean waves, water particles move ________ and energy moves ________. A) vertically; in circles B) in circles; horizontally C) horizontally; vertically D) horizontally; horizontally

Answers

In ocean waves, water particles move in circles and energy moves horizontally. Ocean waves are orbital progressive waves. The water molecules that make up the wave move in circles, or orbits, as the wave progresses. The ocean orbital waves get their start when wind blows on the open ocean, A gentle wind doesn't have much of an effect, but the stronger wind becomes the more it pushes against the water. It transfers energy to the water as it makes peaks and whitecaps in the water's surface.

in circles; horizontally

In ocean waves the water particles move in circles but the wave energy moves horizontally. This is the reason why a piece of wood floating in the oceans bobs up and down.

A clean environment is critical to human health around the world. Which statement best summarizes the air pollution situation in Mexico City?
A) All cars in Mexico run on ethanol, not gasoline.
B) Mexico City has some of the cleanest air in the world.
C) Students are learning about the negative effects of air pollution.
D) Only government officials can own cars.,

Answers

The answer to this question is "C." In Mexico City, is is important that students learn about the negative effects of pollution so they can work to prevent it.

Answer:

C

Explanation:

Students are learning about the negative effects of air pollution.

Other Questions
What is 50% of 80?part ? 50 = - ] percent whole. 80. 100what is the part since we dont know what what is. 50% is the percentand 80 is the whole Post-lab questions: define blood pressure: pressure of the blood in the circulatory system. identify what measurement is used to study blood pressure: mmhg what are the names of the instruments used to measure blood pressure: 1) sphygmomanometer 2) stethoscope the greatest force of the blood against the walls of the arteries during ventricular contraction is called: systolic pressure the constant pressure in the walls of the arteries is called: diastolic describe the normal ranges for each type of blood pressure measurement: 1) 2) if you can palpate a radial pulse from your partner. their bp is at least 80 . if this was not present, but they had a femoral pulse, their bp is 70. if neither was present, but they had a carotid pulse, their bp is 60. if there is no pulse, they are dead. what are the four main factors that influence blood pressure? 1) 2) 3) 4) describe the three factors that may increase blood pressure. 1) 2) 3) describe the three factors that may decrease blood pressure. 1) 2) 3) what other factors may cause miscellaneous readings of blood pressure? 1) 2) how is the blood pressure recorded? identify two types of blood pressure cuffs. 1) 2) describe the exact location you should place the blood pressure cuff. in what direction should the earpieces of the stethoscope be pointed? is having high blood pressure good or bad? why? please explain your thoughts. is having low blood pressure good or bad? why? please explain your thoughts. Find the outlier of the set of data: 80, 71, 75, 69, 74, 17, 82 A.82 B.81 C.74 D.17 Combine any like terms in the expression. If there are no like terms, rewrite the expression.7w3+8t2u22t2u24t2u2 In raymond's run readers get an inside perspective on squeaky's thoughts and feelings. Which best explains how the author achieves this effect In each of the equations or inequalities below, find all the integer values of x that make the equation or the pair of inequalities true. Explain reasoning for each part.Part A: |x|=17Value Of X: Part B: |x+9|=15Value Of X:Part C: |x-10| 13 and |x-10| 9(Find the values of x that make both inequalities true)Values of X: Which of the following rhetorical devices is unique to speaking? A. Pausing before speaking to make the point stronger B. Appealing to the audiences emotions C. Appealing to the audiences sense of logic D. Using humor to make the topic more interesting Which best describes the importance of the microscope to the development of cell theory? Microscopes color different parts of cells so they can be seen with the naked eye. Cells are too small to see with the naked eye, and a microscope magnifies them. The lenses in a microscope reduce the image of an organism to the size of a cell. Microscopes trap animalcules from pond water so they can be studied. End time 10:30 elapsed time 3/4 of an hr what is starting time Eduardo ____________________ di una invitacin a la fiesta a Mariana y Luis anoche. The fact that the majority of human newborns weigh around 7 pounds is reflective of ________________. If a hexagon has a side length of 10 what is the area of the hexagon? The ages of two groups of yoga students are shown in the following dot plots:A dot plot shows Age in years on the horizontal axis. For Group P, there is 1 dot on 4, 2 dots on 5, 3 dots on 7, 1 dot on 8, 2 dots on 12, 1 dot on 14, 2 dots on 16, and 1 dot on 17. For Group Q, there is 1 dot on 4, 2 dots on 6, 2 dots on 8, 1 dot on 10, 3 dots on 12, 2 dots on 14, 3 dots on 16, 1 dot on 19, 3 dots on 20, 1 dot on 21, 2 dots on 22, 1 dot on 23, and 3 dots on 24.The mean absolute deviation (MAD) for group P is 4.15 and the MAD for group Q is 5.35. Which of the following observations can be made using these data? Group P has less variability in the data. Group P has greater variability in the data. Group Q has a lower range. Group Q has a lower mean. In a study, pregnant women were instructed to drink carrot juice for two months before their babies were born, two months after their babies were born, both, or neither. babies whose mothers drank carrot juice before and/or after birth preferred the taste of carrot juice more than those whose mothers did not drink carrot juice. what can we learn from this study? The asymptote of the function f(x) = 3x + 1 2 is_________ . Its y-intercept is_____ . Options for the first blank is y= -2y= -1y= 1y= 2Options for the second is(0,-2)(0,-3)(0,1)(0,-1) Please help!! Which of the following could represent the scale factor of the smaller figure to the larger figure?Smaller figures volume is 216in.^3Larger figures volume is 343in.^3 What are two different ways of factoring 3x 9? Select all that apply. A.3(x + 3) B.3(x + 3) C.3(x 3) D.3(x 3) In a taxi, there is a pregnant lady that's 25 years old.An elder that's 76 years old. The taxi driver who's 34 years old. Who is the youngest? What idea did protestant revivalist charles grandison finney emphasize in his sermons? Read the poem below and answer the question that follows. "The Road Not Taken" by Robert Frost Two roads diverged in a yellow wood, And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth; Then took the other, as just as fair, And having perhaps the better claim, Because it was grassy and wanted wear; Though as for that the passing there Had worn them really about the same, And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day! Yet knowing how way leads on to way, I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence: Two roads diverged in a wood, and I I took the one less traveled by, And that has made all the difference. Source: Frost, Robert. "The Road Not Taken." Poets.org. Academy of American Poets, n.d. Web. 4 Apr. 2011. How would a formal interpretation differ from a biographical interpretation of this poem? Explain how you would interpret this poem from either theoretical point of view.