When a star begins to run out of fuel, the first thing that happens is the shrinking of its core. The core collapses inward due to the lack of energy to counteract gravitational forces. Eventually, this leads to the formation of a white dwarf.
(option c)
Explanation:The first thing that happens when a star begins to run out of fuel is that the star's core shrinks. As the core runs out of fuel, it can no longer produce enough energy to counteract the gravitational forces, causing it to collapse inward. This collapse leads to the core becoming denser and hotter.
Eventually, the shrinking core may trigger a fusion reaction in the surrounding helium shell, generating a new flow of energy. However, for low-mass stars, the core lacks the mass and temperature to initiate another round of fusion, so the core continues to shrink.
At extreme densities, a new behavior of matter, governed by quantum physics, comes into play. This behavior helps the star achieve a final state of equilibrium, resulting in the formation of a white dwarf.
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Weather is the condition of the air around us true or false
This is true weather is the condition of the air around us
Approximately 60% of human genes are also found in fruit flies. About 97.5% of human genes are also found in mice. What does this evidence suggest? A. Fruit flies have had more mutations and recombinations during their evolution than mice. B. Mice have had more mutations and recombinations during their evolution than fruit flies. C. Humans and mice share a more recent common ancestor than do humans and fruit flies. D. Mice and fruit flies share a more recent common ancestor with each other than with humans.
The correct answer is option C. Humans and mice share a more recent common ancestor than do humans and fruit flies.
The molecular basis of the evolution says that the organisms, which have more similar genes and genetic sequence are more likely to have same most common ancestor. In this case, the similarity between the mice and the humans are more common as compared to the humans and the fruit flies. So, the human and the mice share more recent common ancestors.
Answer:
C
Explanation:
what is the job of the kidneys
Answer:
Top 5 Jobs Kidneys Do:
1. Remove wastes and extra fluid
2. Control blood pressure
3. Make red blood cells
4. Keep bones healthy
5. Control pH Levels.
Explanation:
Pls Brainliest
How are forest ecosystems named
Which of these are sources of lake water ? select the three correct answers
A. Ocean waves
B. Groundwater
C. Rain runoff
D. Melting snow
Answer:
B. C. and D.
Explanation:
apex
The sources of lake water include ocean waves, ground water, and rain runoff. Thus, the correct options are A, B, and C.
What is lake water?
A lake is a water body which is surrounded by land from all the sides. They are found in mountains, deserts, plain areas and in seashores. The water in the lakes comes from rain, snow, melting ice, streams, and groundwater. Mostly lakes contain freshwater.
Water from the rain runoff flows through various paths and collects into lakes. It carries various types of small leaves or soil particles which along with it enters into the lake.
The ground water can also form lakes and is the main source of freshwater. The melting snow is also a source of fresh water that flows and enters the nearby ponds and lakes that are present in the nearby areas.
Therefore, the correct options are A, B, and C.
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Select all that apply.
Which of the following properties of carbon give it particular importance to life?
It's very cohesive and adhesive.
It can form polymers like carbohydrates, lipids, proteins, and nucleic acids.
It can regulate temperature.
Decomposition of molecules can occur readily, releasing needed energy.
Answer: It can form polymers like carbohydrates, lipids, proteins, and nucleic acids.
Explanation:
The carbon is an important element which forms an important ingredient of the bio molecules like carbohydrates, lipids, proteins these are the important components of the food. The lipids form the main part of the cell membranes which selectively restricts and allow the passage of the molecules and ions in and out of the cells. The proteins are the building blocks of life they perform functions in cell metabolism. The nucleic acid includes the genetic material which is inherited by the offsprings from their parents. All these bio-molecules are necessary for the survival of the living organisms.
Which of the following is not a reason that analyzing and collecting weather records is important?
A. Weather data can be collected to make climate maps.
B. Predicting future climate events, such as droughts, can be easier.
C. Collecting weather records can help scientists see patterns in the weather.
D. Collecting weather data helps geologists locate land that has been weathered.
Sorry I am late I think its D.. please let me know if it is correct or not thanks!!
Answer:
Collecting weather data helps geologists locate land that has been weathered
Explanation:
hey can some one give me information about the guy that discovered carbon
Joseph Black, born in 16 April 1728 in Bordeaux, France.
Known for his discoveries of magnesium, latent heat, specific heat, and carbon dioxide.
A solution at a pH of 10 contains how many times more hydrogen ions than a solution at a pH of 7?
Which structure ATP or ADP contains more stored energy? Where is the energy stored
Adenosine triphosphate (ATP) holds more stored energy than Adenosine diphosphate (ADP). The energy is stored in the high-energy bonds between the phosphate groups in ATP, and it is released when ATP is converted to ADP.
Explanation:The two structures, ATP (Adenosine triphosphate) and ADP (Adenosine diphosphate) both play crucial roles in energy storage and transfer in cellular function. To answer the question, ATP is the molecule that holds more stored energy. ATP consists of an adenine, a ribose, and three phosphate groups. The energy in ATP is stored in the bonds between the phosphate groups. These bonds are considered high-energy because a lot of energy is required to form them and energy is released when they are broken.
When ATP is transformed into ADP (a process called hydrolysis), a phosphate group is released, and so is the energy previously stored in the bond. The energy released from the hydrolysis of ATP to ADP is used for various cellular activities. When the cell has excess energy, it is used to convert ADP back into ATP, storing the energy in the newly formed phosphate bond for later use.
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DNA replication is an important part of cellular division because correct replication
A) ensures that identical and complete genetic information is passed to both daughter cells.
B) produces mutations that usually are advantageous for the survival of the organism.
C) combines sperm and egg to form a zygote that will develop into a new organism.
D) communicates information about the cellular environment to adjacent cells.
The answer would be a.ensures that identical and complete genetic information is passed on to both daughter cells
DNA replication is an important part of cellular division because correct replication ensures that identical and complete genetic information is passed to both daughter cells. The correct option is a.
What is DNA replication?DNA replication is the physiological method that generates two identical replicas of DNA from a single original DNA molecule in molecular biology.
DNA replication occurs in all living life forms and is the most important component of biological inheritance.
Each DNA molecule is made up one strand of the original DNA molecule and one strand that has been synthesized (created). As a result, DNA replication is referred to as semiconservative.
DNA includes the instructions that an organism requires to develop, survive, and reproduce. Before cells can divide, their DNA must be replicated.
This ensures that each daughter cell receives a copy of the genome, resulting in successful genetic trait inheritance. DNA replication is an essential process that is conserved across all organisms.
Thus, the correct option is a.
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Plants make sugars in the presence of sunlight in a process called photosynthesis. What form of carbon do the plants take in for this process?
Plants take in Carbon Dioxide during the process of photosynthesis.
Hope this helps!! :)
Plants make sugars in the presence of sunlight in a process called photosynthesis, and plants take in carbon dioxide ([tex]CO_2[/tex]) from the atmosphere for the process of photosynthesis as described in Option A.
What is the role of carbon dioxide in photosynthesis?During photosynthesis, plants use energy from sunlight to convert carbon dioxide and water into glucose and oxygen, and this process of photosynthesis can be divided into two main stages: the light-dependent reactions and the light-independent reactions. Light-dependent reactions take place in the thylakoid membranes of the chloroplasts and involve the absorption of light, but in light-independent reactions, carbon dioxide is fixed. Later, when carbon dioxide is fixed, glucose is also formed.
Hence, plants take in carbon dioxide ([tex]CO_2[/tex]) from the atmosphere for the process of photosynthesis as described in Option A.
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The question is incomplete, the complete question is below
Plants make sugars in the presence of sunlight in a process called photosynthesis. What form of carbon do the plants take in for this process?
A)Atmospheric carbon dioxide
B)no carbon dioxide is used
what happens after transcription ends
This is a description of the notations that appear at the end of the official transcript.
The information from messenger RNA is used to create polypeptide sequences during what process?
The translation process activates to create polypeptide sequences.
ExplanationWhen the messenger RNA gets information (codon) from the DNA, it comes toward the ribosomes where transfer RNA also attached. At the ribosomes, the transfer RNA decodes the information of messenger RNA as match its anticodons with codons of messenger RNA. (Nucleotides as A with U and C with G). This process of decoding at the ribosomes with the help of transfer RNA called the translation process which ultimately leads the process toward releasing of long chain peptide.
Which describe weathering? Check all that apply.
creates sediment
breaks down rock
causes heating and cooling
uses Earth’s natural processes
carries away fragments
Which describe weathering? Check all that apply.
Weathering means the materials like rocks, soil, woods, etc they break down in due course of time due to certain atmospheric conditions and many other biological factors.
So, according to this definition, we can say that the correct options are -
- creates sediment
- breaks down rock
- carries away fragments
If a molecule’s concentration outside the cell is higher than it is inside the cell , that solution is??
Them the solution is hypertonic. This means that the water within the cell would exit it and go outside and the cell would shrink.
which process joins amino acids together to form proteins
Polypeptide chains are formed when amino acids are joined by peptide bond . Linear polymers are proteins which are formed by joining of alpha carboxyl group of one amino acid to the alpha amino group of another amino acid. Peptide bond is formed when C=O group of one molecule react with NH2 group of another molecule and releasing a water molecule .
The process that joins amino acids together to form proteins is called "protein synthesis" or "translation." Protein synthesis occurs within the cells and involves two main steps: transcription and translation.
Transcription: The first step is the transcription of the genetic information stored in the DNA into a messenger RNA (mRNA) molecule. This process takes place in the cell nucleus. The enzyme RNA polymerase reads the DNA template strand and synthesizes a complementary mRNA strand by adding RNA nucleotides.
Translation: The second step is translation, which occurs in the cytoplasm of the cell, specifically in the ribosomes. During translation, the mRNA is "read" by ribosomes, and the sequence of nucleotides (codons) is used as a template to assemble amino acids into a polypeptide chain, which eventually folds into a functional protein.
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A student hypothesizes that placing blood cells in high concentrations of salt water will cause them to grow and eventually lyse, or burst. He performed an experiment in which he submerged blood cells in various concentrations of salt water and recorded his results in the table below.
No; the cells shrink with increasing salinity.
Hope this helps!
Answer:
No; the cells shrink with increasing salinity.
Explanation:
I did the study island
Covalent bonds are formed when valence electrons are _____ between _____.
A. shared; ions
B. shared; atoms
C. transferred; ions
D. transferred; atoms
Option B is correct.
B. shared; atoms
Explanation:A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Answer:
B. shared; atoms
Explanation:
Covalent bond is formed by sharing of electrons between two atoms. In this way full outer shell is achieved by both the atoms. Since there is no gain or loss of electrons, no ions are formed in the process.
It is usually formed between the atoms of similar electronegativity. It can be of many types like sigma bond, pi bond etc. If a pair of electrons is shared, it's a single bond. If two pairs are shared, it's a double bond and if three pairs are shared, it's a triple bond.
Name three characteristics of gas giants that make them different from terrestrial planets.
Unlike terrestrial planets whose composition is rocky, gas giants have a mostly gaseous composition, such as hydrogen and helium. They do have some rocky material, although this is most often found in the planet core. Terrestrial planets are generally relatively small while gas giants are instead very large. (Historical researcher, D. Vogt stated that the lightest gas giant in the solar system is fourteen times the mass of the heaviest terrestrial planet, Earth.)
Gas giants are different from terrestrial planets in terms of composition, size and mass, and atmosphere characteristics.
Gas giants differ from terrestrial planets in several key ways:
Composition: Gas giants are primarily made of hydrogen and helium gases, while terrestrial planets have rocky cores surrounded by mantles of rock and metal.Size and Mass: Gas giants are significantly larger and more massive than terrestrial planets, with over 1,000 Earths being able to fit inside Jupiter.Atmosphere and Surface: Gas giants lack solid surfaces and have thick atmospheres with strong winds, creating storms and distinct features like Jupiter's Great Red Spot and Neptune's Great Dark Spot.Therefore, gas giants differ from terrestrial planets by composition (mostly hydrogen and helium), lack of solid surfaces, and being significantly larger and more massive.
Natural selection is an example of a mechanism of ed evolution. Does this mechanism produce a change in individuals or populations? Explain !
Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow. ... Two of the most relevant mechanisms of evolutionary change are: Natural Selection and Genetic Drift.
roosters have genes that determine feather length. which term describes the form of a gene that produces a specific trait, such as long feathers or short feathers? a. allele. b. dna. c. chromatic. d. gamete
Allele.
-An allele is a form of a gene that determines a specific trait.
-dd.
-Traits are passed in discrete units from parent to offspring.
-He collected detailed information on inherited traits of pea plants.
Hope this helps
The operative unit of hereditary is called genes. Genes are made of DNA and they act as a messenger to make protein for cell structure and functioning.
The correct answer is:
Option A. Allele
This can be explained as:
An alternative form of a gene is called an allele it defines a specific trait.These traits get carried from parents to their offspring in a discrete assemblage.DNA is biochemical carrying the genetic data to be coded.While gametes are the reproductive cells of the female and males.Therefore, alleles are the form of genes that determines a specific type of trait.
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"Nodes of Ranvier" in a sentence.
Definition: Gaps between the myelin sheath where sodium and potassium ions pass through during an action potential. Location where “electrical” conduction takes place.
(pls make it not sound like a googled sentence)
a hole happening at consistent interims between portions of myelin sheath along a nerve axon.
The Nodes of Ranvier are gaps in the myelin sheath that contain ion channels, allowing for rapid nerve impulse transmission via saltatory conduction.
The Nodes of Ranvier are essential anatomical features in the nervous system of many animals, including humans. They are regularly spaced gaps between sections of the myelin sheath that encase axons. Within these gaps, voltage-gated sodium (Na+) and potassium (K+) channels are found, which are crucial for the propagation of action potentials. As a result, nerve impulses can 'jump' from one node to the next along the axon, which expedites the transmission of electrical signals. This process is known as saltatory conduction and it greatly increases the speed at which nerve impulses travel.
When one DNA molecule is replicated, the result is two DNA molecules. What is true of the second DNA molecule? A. It is identical or nearly identical to the first DNA molecule. B. The sequence of bases, from top to bottom, is opposite the sequence in the first DNA molecule. C. It is half the size of the first DNA molecule. D. It is twice the size of the first DNA molecule.
It is identical or nearly identical to the first DNA molecule.
Answer: it is identical or nearly identical to the first DNA molecule.
Explanation: The process of DNA replication results in an exact copy of the original DNA molecule. This process occurs once in the life-cycle of a cell, allowing the cell to divide into two cells with identical DNA copies. Rarely, a mistake occurs during some part of the process. These mistakes are called mutations, and will result in a slightly different strand of DNA.
what is membrane-bound nucleus
Nucleus is double membrane bound organelle present at center of cells. The nucleus holds the cell's DNA and controls all cell function. Cells with a nucleus are eukaryotic, and are also known as eukaryotes. The nuclear envelope in eukaryotes is like our skull, covering the nucleus and keeping the DNA safe.
This organelle has two major functions: it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division). Only the cells of advanced organisms, known as eukaryotes, have a nucleus.
What cellular interactions are the result of their training, allowing for improved athletic performance?
A) decreased muscle mass - increased proteins - decreased fat - glucose used for energy source
B) increased muscle mass - increased mitochondria - increased cellular respiration - increased ATP
C) decreased mass - less energy needed for movement - less carbohydrates required - more available ATP
D) decreased respiration rate - increased oxygen consumption - increased cellular respiration - increased energy
The correct answer for this question is C) decreased mass - less energy needed for movement - less carbohydrates required - more available ATP
Solution; Increased muscle mass in athletes will increase the number of mitochondria in body. Mitochondria provides energy to cells of our body so more mitochondria will results in more energy and due to large amount of energy there will be increased cellular respiration and less fatigue, thus athletic performance will be improved.
Answer:
B
Explanation:
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Where does the sea-floor spreading take place? A. Convergent boundaries B. Transform boundaries C. Oceanic volcanoes D. Mid-ocean ridges
Its Mid-ocean ridges so D
The correct option is D. mid-ocean ridges. Sea-floor spreading occurs at mid-ocean ridges, where two tectonic plates are moving apart.
These are underwater mountain ranges formed by divergent plate boundaries, where two tectonic plates are moving apart. As the plates separate, magma rises from beneath the Earth's crust to create new oceanic crust, which gradually pushes the older crust away from the ridge, leading to the expansion of the ocean floor.
what is a community of organisms and their enviornment
A community of organisms and their environment is called an ecosystem.
it is called ecosystem
Based on this isotherm map in what direction would you head from New York State to find warmer temperatures
An isotherm refers to a line associating locations with equivalent temperatures. The isotherm maps demonstrate that where the temperatures are comparatively low and high, and also where temperature modifications are dramatic or gradual over a distance. The isotherms are demonstrated with curved lines or in colored bands associating the temperatures.
In the given case, one should go towards the South-West direction of the map to find a warmer temperature as the isothermal line of the highest temperature, that is, of 68 degree F directs towards the South-West.
In the US, you would generally head south from New York State to find warmer temperatures, due to the Earth's tilt causing the sun's rays to heat the equatorial regions more intensely.
Explanation:Without an actual isotherm map provided for reference, it's difficult to give a precise direction. However, generally, greater warm temperatures in the United States are found as you head southwards. This is based on the idea that temperature tends to rise as we move towards the equator. For example, moving from New York State towards Florida would generally involve encountering progressively warmer temperatures. This is due to the earth's tilt creating a direct path for the sun's rays to the equator than the poles, heating these areas more intensely.
The direction of heat transfer from hot to cold also supports this concept, mirroring the general tendency of warm air to rise and move towards cooler regions. These concepts of heat transfer and geographic temperature distributions are fundamental elements of thermodynamics and climatology. Secondly, other physical factors could affect the temperature such as altitude, ocean currents, and topography.
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which is an example of artificial selection
-two male wild turkeys fight. The weaker one is killed. The winner mates with all the females
- A farmer crosses two kinds of corn. He produces a new, better tasting type of corn
-a flood drowns most of the lizards in an area. Only lizards that can swim live to reproduce
A farmer crosses two kinds of corn. He produces a new, better tasting type of corn is the answer