what is water molecule made of A.one oxygen atom and two hydrogen atoms B. one carbon atom and two oxygen atoms C.one hydrogen atom and two oxygen atoms D.one carbon atom and four hydrogen atoms
Answer:
A. one oxygen atom and two hydrogen atoms
Explanation:
A water molecule is made of one oxygen atom and two hydrogen atoms.
Water's exceptional polarity allows it to dissolve a wide range of substances. The positively charged hydrogen atoms are highly attractive to negatively charged ions, while the negatively charged oxygen atom attracts positively charged ions.
These properties make water an exceptional solvent for both ionic compounds and polar molecules. In addition, the robust hydrogen bonds between water molecules are responsible for their remarkable boiling and melting points, which require a considerable amount of energy to break.
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When the amount of water in a glass slowly decreases, this is due to _____?
Explanation: APEX 1/8/2020 correct
In what way does the shape of a molecule affect how the molecule is involved with living systems?
Answer:
It determines how the molecules function.
Explanation:
How does the loop of henle enable the mammalian kidney to produce hyperosmotic urine?
What is the serous membrane that lines the walls of the thoracic cavity?
The pleura is the serous membrane lining the walls of the thoracic cavity, with a parietal layer against the cavity wall and a visceral layer covering the lungs, and a fluid-filled space in between to reduce friction.
Explanation:The serous membrane that lines the walls of the thoracic cavity is known as the pleura. This thin, double-layered membrane has a parietal layer that lines the cavity wall and a visceral layer that covers the external surface of the lungs. Between these layers is the pleural cavity, containing a small amount of serous fluid that acts as a lubricant, reducing friction during respiratory movements.
There are other serous membranes within the body, including the pericardium that surrounds the heart and the peritoneum that lines the abdominal cavity. These membranes provide a smooth and slippery lining, protect the organs they encase, and help to prevent friction, which could lead to inflammation.
The branch of the autonomic nervous system that prepares the body for quick action in an emergency is the ________ division.
Which component of the earth system is most associated with non-renewable resources?
The Earth's crust, or the geology of the planet, is most associated with non-renewable resources like fossil fuels and nuclear power. These resources are finite and are being depleted faster than they can be formed naturally, leading to an essential transition towards renewable energy and sustainable practices.
Explanation:The component of the earth system most associated with non-renewable resources is geology, which pertains to the Earth's crust where these resources are located. Non-renewable resources, such as fossil fuels and nuclear power, exist in finite amounts and are being used up more rapidly than they are formed by natural processes. Fossil fuels, including petroleum, coal, and natural gas, took millions of years to form from the remains of plants and animals. These fuels are the primary sources of energy used globally and are integral to maintaining economic growth and our way of life.
Current consumption rates indicate that resources like oil and natural gas will be depleted within a few decades to a century, with coal lasting slightly longer. Such scarcity underscores the importance of transitioning to alternative energy sources and enhancing the use of renewable resources like water, wind, solar, and biomass. The pressing concern of global warming and the environmental impact of energy production, particularly from fossil fuels, further amplifies the need for sustainable energy solutions.
The cellular organelles with inheritance independent of the nucleus are the _____________ and the ____________ .
Name two ways that scientists share their experimental results with other scientists
A parent asks, "how should i bathe my baby now that he has had surgery for his inguinal hernia?" which instruction should the nurse give the mother?
Is pseudomonas aeruginosa resistant to sulfamethoxazole and trimethoprim?
Pseudomonas aeruginosa is resistant to many antibiotics and this includes a generally high level of resistance across different antibiotic classes, although specific resistance to sulfamethoxazole and trimethoprim is not detailed in the provided materials. Effective treatment often requires antibiotics to which the particular strain is susceptible, determined through sensitivity testing in clinical labs.
The student has asked about the resistance of Pseudomonas aeruginosa to the combination antibiotic sulfamethoxazole and trimethoprim. P. aeruginosa is known for its resistance to many antibiotics, and this resistance can stem from a variety of mechanisms, including production of ß-lactamases, mutations affecting porins, and the ability to pump antibiotics out of the cell. Although the specific resistance to sulfamethoxazole and trimethoprim is not detailed in the references provided, Pseudomonas spp. are generally resistant to many antibiotic classes.
Infections caused by P. aeruginosa may require treatment with antibiotics to which the strain is susceptible, such as polymyxin B, gentamicin, or some fluoroquinolones. It is crucial for clinical microbiology labs to perform sensitivity testing to determine the most effective antibiotic. For staphylococcal infections, including those caused by MRSA, trimethoprim-sulfamethoxazole (TMP/SMZ) is often used; however, this does not imply the same effectiveness for infections caused by P. aeruginosa.
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Which of the following does a weather station model demonstrate? a) latitude b) gravity c)air pressure d) air mass
The weather station model demonstrates the air pressure of a location. It shows about the weather at a reporting station. Thus, the correct option is C.
What does weather station demonstrates?In meteorology, weather station models are the illustrations which shows the weather occurring at a given reporting station. Meteorologists create the weather station model to fit a number of weather elements into a small space on the weather maps.
Weather station model allows map users to analyze patterns in the atmospheric pressure, temperature, wind speed and direction, cloud cover, precipitation, and other parameters.
Air pressure on a weather station model only contains the last 3 digits of the air pressure. A pressure of 995.0 mb is written as 950 on the station model.
Therefore, the correct option is C.
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There are many areas of science that experience debate. How can a scientist most effectively defend their position if they discuss a controversial topic?
A.) They can alter their experimental results to fit the opinions of the community.
B.) They can argue using critical thinking skills and data.
C.) They can ignore any criticism that may occur.
D.) They can re-analyze their data until they get a better accepted result.
The scientist can argue using critical thinking skills and data to discuss a controversial topic to defend their position most effectively.
What do you mean by critical thinking skills?"Critical thinking skill is the analysis of available facts, evidence, observations, and arguments to form a judgment."The analysis should be rational and unbiased based on evidences and facts.One should fully research about the topic and put forward their points in a sequential and understandable manner.What do you mean by controversial topic?"It is a prolonged dispute, debate, or state of contention, especially one that unfolds in public and involves a stark difference of opinion."Hence, the correct option is B. They can argue using critical thinking skills and data.
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Which view of our solar system is the correct view?
Heliocentric
Geocentric
Astrocentric
none of the above
Which process can be primarily affected by gallbladder disease ?
A. Carbohydrate digestion
B. fat digestion
C . protein Digestion
D. vitamin digestion
Answer: B. Fat Digestion
Explanation: Took the test on PLATO its correct
Cisternae that are located near the trans face of a golgi body are (click the two that are true)
If a scientist wanted to study cell responses under varying environmental conditions, what laboratory technique would be appropriate to use
What happens when the results of a study create an undesirable outcome for the participant?
It is at the end of the _____ stage of sleep that children may wet the bed.
Where is genetic material found in eukaryotic cells and prokaryotic cell's?
If a reaction is exergonic, then which of these statements is true?
Final answer:
The true statement for an exergonic reaction is that (option A) the products have lower Gibbs free energy than the reactants, as energy is released during the reaction.
Explanation:
If a reaction is exergonic, then the correct statement is: A. The products have lower Gibbs free energy than the reactants. This is because during an exergonic reaction, energy is released as the reaction proceeds. As energy diagrams and thermodynamics principles indicate, the Gibbs free energy change for an exergonic reaction is negative, meaning that the reaction releases energy, often in the form of heat, and the products have less energy than the reactants. The idea of a reaction being 'downhill' metaphorically represents this energy release.
The other options are not generally true for exergonic reactions. B. Energy must be added for the reaction to proceed is incorrect because that describes an endergonic reaction, where energy input is required. C. The products have lower entropy (are more ordered) than the reactants is not necessarily true; entropy changes depend on the specific reaction. D. The reaction always occurs quickly is also incorrect as the rate of a reaction is dependent on factors such as activation energy and not only on the exergonic nature of the reaction itself.
What is the ultimate energy source for most forms of life on earth?
Which of the following is not present in an atom?
Electron
Element
Neutron
Proton
In an atom, an element is not present. Hence, the second option is the correct answer. The atom is the basic structural unit of the element.
What is an atom?An atom is the basic, fundamental unit of the element. The atom is made up of electrons, protons, and neutrons. In an atom, the electron carries a negative charge and the proton carries a positive charge. The neutron has no charge. The proton and neutron are present in the centre of the atom. Electrons are present around it. Electrons move in orbits.
In a neutral atom, the electron and proton numbers are the same. Hence, they don't show any charge. The electron can move out of the atom or add to an atom. These electrons are called valence shell electrons. Atoms constitute to make an element. Others are incorrect options for the statement because electrons, protons, and neutrons are all components of an atom.
Hence, the second option is the correct answer, as an atom is a part of an element, but an element is not a part of an atom.
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Identify the four postulates of natural selection. select all that apply. select all that apply. individuals with certain traits are more likely to survive and reproduce. individuals in a population all possess the same traits. all individuals in a population have equal reproductive success. survival and reproductive success are variable among individuals in a population. some trait differences are heritable. individuals in a population vary in the traits they possess.
What empirical evidence could most effectively and directly be used to convince law makers to remove a dam that is blocking a river used by wild salmon to reach their breeding grounds
A.) Information about the number of salmon offspring are produced over several years.
B.) Information on the distance from the ocean to the rivers that the salmon use.
C.) Information on how often the salmon mate during their breeding season.
D.) Information on how long it takes the juvenile salmon to grow into adults.
The correct answer is A) Information about the number of salmon offspring are produced over several years.
The empirical evidence that could most effectively and directly be used to convince lawmakers to remove a dam that is blocking a river used by wild salmon to reach their breeding grounds is "Information about the number of salmon offspring are produced over several years."
When you want to be listened by local authorities about what you consider is a serious issue for the community of the environment, you need to provide valid and serious data, not only your opinion or beliefs. Local authorities are expecting to have the right reasons, valid information, the statistics and the possible consequences of not attending an issue. In this case, an environmental issue. That is the best way to convince them and how this is going to affect them in case they do not attend the problem.
Monomers linked together are called ____________. the process of linking monomers together is called _______________________.
When you digest food starch is broken down to what molecule?
In the digestive process, starch is broken down into glucose, starting with salivary amylase in the mouth and continuing with other enzymes in the small intestine. Glucose is then absorbed by cells for energy.
Explanation:When you digest food, starch is broken down into a simpler molecule known as glucose. The digestion process begins in the mouth, where salivary amylase starts breaking down the long polysaccharide chains of starch into shorter chains and disaccharides, such as maltose. As digestion continues in the small intestine, enzymes like pancreatic amylase further break down these chains, and brush border enzymes such as maltase convert maltose into individual glucose molecules, which can be absorbed by the cells.
Starch is a carbohydrate composed of many glucose monomers linked together by 1-4 or 1-6 glycosidic bonds. Upon digestion, these bonds are hydrolyzed, releasing the energy-storing glucose units. This enzyme-catalyzed process is crucial for providing energy to cells and maintaining overall homeostasis in the body.
Evaluate the relative environments inside and outside the cell when a cell is said to be in dynamic equilibrium with its environment
The relative environments inside and outside a cell in dynamic equilibrium are similar in terms of particle concentration. Despite this, there is continuous particle movement across the cell membrane to maintain internal stability. This involves both passive and active transport mechanisms.
Explanation:When a cell is said to be in dynamic equilibrium with its environment, it means that the concentration of molecules, ions, or other particles is the same both inside and outside the cell, yet there is a constant movement or exchange of these particles across the cell membrane. This is crucial to maintain the cell's homeostasis, or stable internal conditions.
Despite this balance, particles constantly move across the cell membrane either through passive transport like diffusion or osmosis, or active transport, which requires energy. However, the cell ensures that the overall balance of substances is preserved. In other words, the volumes of substances leaving and entering the cell are the same.
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Dynamic equilibrium in cells refers to its ability to maintain its internal environments despite changes in the external environment. This dynamic balance enables growth, reproduction and sustains a variety of crucial processes within the cell. Material exchange between the cell and its environment aids these processes, maintaining dynamic equilibrium.
Explanation:When a cell is said to be in dynamic equilibrium with its environment, it implies that the cell has achieved a state of balance between its internal and external environments. The cell actively regulates its internal conditions to maintain this balance, even as the external environment changes.
Growth, reproduction, and dynamic homeostasis require that cells create and maintain internal environments that are different from their external environments. Despite the differences, there's a continuous exchange of materials, such as nutrients and waste products, between the cell and its surroundings, enabling various processes like growth and reproduction.
For instance, if there is a higher concentration of a certain molecule outside the cell, it would naturally want to equilibrate and move into the cell. Yet, the cell maintains its internal environment by utilising energy to actively transport that molecule out, hence maintaining its 'dynamic equilibrium'.
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The skin, which plays an important protective role, is composed of which type of epithelium? the skin, which plays an important protective role, is composed of which type of epithelium? simple columnar simple squamous stratified columnar stratified squamous
What is the correct order light must go through to be analyzed by the visual system?
Light is captured, and transduced by the visual system which consists mainly of the eye.
As light passes through the lens via the pupil, retina gets hold of the light that passes through the initial part of the organ. The presence of rods and cones on the surface of the retina enables the eye to process or more specifically transduce this stimuli as a electrochemical signals which can be processed by the brain via the optic nerve.