Molecular masses of the given sample are:
NaCl: 58.44 g/mole, 80 g, 1.37 M
KCl: 74.55 g/mole, 2 g, 27 mM
Na2HPO4: 142.01 g/mole, 14.2 g, 100 mM
KH2PO4: 136.09 g/mole, 2.4 g, 18 mM
What do you mean by molecular mass?The molecular mass is the mass of a given molecule: it is measured in daltons. Different molecules of the same compound may have different molecular masses because they contain different isotopes of an element.
Moreover, molecular mass or molecular weight is the mass of a molecule. “The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance”. It is expressed in the atomic mass unit(u).
Therefore, molecular mass of an element is defined as the sum of the masses of the elements present in the molecule. Molecular mass is obtained by multiplying the atomic mass of an element with the number of atoms in the molecule and then adding the masses of all the elements in the molecule.
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Drag each characteristic to the correct category.
Viruses do not possess all the characteristics of life. Identify those characteristics that viruses display and those they don’t display.
made up of one or more cells
has a defined boundary
uses energy
exhibits growth and development
possesses internal organization
eliminates waste
Viruses are the acellular organisms that are non-living outside any living body. But once they are present inside a living body, they are able to multiply and increase their numbers inside the host cell. For this the viruses use host's energy and other components. They takeover host cell's machinery.
The internal organization of the viruses is composed of a genetic material either DNA or RNA, which is covered by a protein coat called the capsid. Viruses may or may not have an outer envelope made up of lipid.
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list four types of evidence a scientist use to study climate conditions what's occurred in the past
The history of scientific discovery of climate change began in the early 19th century when Ice Ages and other natural paleoclimate changes were first suspected and the natural greenhouse effect was first identified.
Evidence of past climate includes:
Buried in sediments at the bottom of the oceans and lakesLocked away in coral reefsFrozen in glaciers and ice capsPreserved in the rings of treesTo know more about climate change visit:
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Theorists who emphasize the discontinuity of development maintain that growth occurs in distinct stages.
Piaget's cognitive emphasize on the discontinuity of development that growth occurs in distinct stages.
What theories emphasize discontinuous development?The discontinuity sees development as more abrupt a succession of changes that produce different types of behaviors in different age at specific life periods is called stages. Biological changes provide the potential for occurrence of these changes. Period theories which emphasize discontinuous disruption, assume that developmental change often occurs in distinct stages that are qualitatively different from each other, and in a set, universal succession. The classical theories of Freud, Erikson, Piaget, and Kohlberg are called stage theories. Theories of discontinuously emphasizes the insensibility, defense mechanisms, and effect of the id, ego, and superego. Discontinuous are clear stages of development.
So we can conclude that Another issue rotates around the continuous and discontinuous theories emphasizing how change occurs in the growth stages.
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What is it referred to when one galaxy collides with another?
O galactic cannibalism
O gravitational lensing
O globular cluster
O irregular galaxy meeting
Galactic cannibalism is referred when one galaxy collides with another.
what is galactic cannibalism?
Galactic cannibalism is the process by which a big galaxy combines with a companion through tidal gravitational interactions, creating a larger, frequently irregular galaxy.
In a new study, researchers channelled their inner Indiana Jones to demonstrate that the Milky Way, our home galaxy, once gobbled up five smaller galaxies.
That will help scientists comprehend how the Milky Way and Andromeda will engage with other, tiny, nearby galaxies and how, eventually, they will merge and join after billions of years in our portion of the cosmos.
Therefore, Option A is correct.
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help asap
What causes the rock layers of mountains to form zigzag shape?(1 point) Responses a transform fault a transform fault continental plate uplift continental plate uplift a normal fault a normal fault folding of rock
The outcrop of the eroded plunging anticlines and synclines bureaucracy a function zigzag pattern in the rock.
The fracturing of rock layers arise through excessive stress resulting from plate tectonics. This stress takes place because of convergent plate barriers in which the tectonic plates collide and push in opposition to every different in contrary directions.
When rocks deform in a ductile manner, in preference to fracturing to shape faults or joints, they will bend or fold, and the ensuing systems are referred to as folds. Folds end result from compressional stresses or shear stresses performing over sizeable time.
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The circle below represents sells the arrow shows the movement of materials State whether each diagram represents active or passive transport
Passive transport carries molecules from the more concentrated side to the less concentrated one, while active transport carries molecules against their electrochemical gradient, needing the energy to do it.
Note: Since the image is not attached and I could not find it, I will define active and passive transport and attach an image with cells, molecules, and arrows indicating molecule motion for each transport case.
What are active and passive transport?Active and passive transport are two ways in which substances can move through the plasmatic membranes.
Passive transport occurs in favor of an electrochemical gradient and does not need energy to move because molecules move from the more concentrated side to the less concentrated one.
Simple diffusion and facilitated diffusion are two types of passive transport.
On the contrary, active transport moves molecules against their electrochemical gradient. This means that molecules move from the concentrated side to the more concentrated one. This process needs the energy to occur.
In the attached image you will find two scenarios. One of them is passive transport and the other one is active trasport. You should notice the differences in substances concentrations at each side of the membrane, and the arrow direction.
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Form a hypothesis to explain the earthquakes that preceded the eruption of Mount St. Helens' 2004 eruption.
The eruption was preceded by a two-month series of earthquakes and steam-venting episodes produced by an injection of magma at shallow depth below the mountain.
What preceded the eruption of Mount St. Helens' 2004 eruption?A wave of diminishing pressure traveled down the volcanic conduit until it reached the underground magma reservoir. The magma reservoir then started to rise, produce bubbles (degas), and erupt explosively, which drove a Plinian eruption that lasted for 9 hours. Mount St. Helens's summit crater saw a steam-blast eruption recently.
An injection of magma at a shallow depth below the mountain caused an enormous bulge and a fracture system on Mount St. Helens' north slope before the eruption, which was preceded by a series of earthquakes and steam-venting episodes that lasted for two months.
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Nondisjunction during meiosis can result in all of the following EXCEPT
Group of answer choices
cells abnormal numbers of sex chromosomes
cells with the normal number of chromosomes
cells with additional chromosomes
cells with missing chromosomes
Answer:
cells with normal number of chromosomes
3. These are a part of the biotic component and are responsible for making the
own food.
a. producers
b. consumers
u. bears
c. habitats
d. niche
Answer:
producers
Explanation:
because they are living and most produce their own food through processes like photosynthesis. (e.g. plants and algea)
Can humans ever directly see a photon?
Answer:
yes! Human eyes are specifically designed to detect light
Explanation:
Help me lolll pls pls pls pls pls pls pls pls pls
Answer:
Plants are amazing organisms! In a process called photosynthesis, they take sunlight energy from the sun,carbon dioxide gas from the air, and water from the ground and make glucose (food energy)! They also make oxygen during this process. Plants can either immediately use the glucose they make to power their cells or sto… use.
Explanation:
I couldn't read some of the text due to the picture, but this should be right. I hope this helps! :)
What is considered the "energy
currency" of a plant cell that is
produced by light reactions?
A. ATP this
B. ADP
C. NADP+
D. 02
All biological organisms contain the crucial chemical ATP (adenosine triphosphate). Consider it the cell's "energy currency." The ATP molecule splits off one of its three phosphates when a cell has to expend energy to complete a task, resulting in the formation of ADP (Adenosine di-phosphate) + phosphate.
What are the light processes that a plant cell uses as currency for energy?In the light-dependent reactions, chlorophyll absorbs solar energy and transforms it into chemical energy that is then stored in the form of the energy-trading molecules ATP and NADPH (nicotinamide adenine dinucleotide phosphate) (adenosine triphosphate).
How are NADP+ and NADPH linked in the light reaction?NADPH is a different energy carrier used in photosynthesis, yet it performs similarly NADP+, which has lesser energy, becomes NADPH after absorbing a high-energy electron and a proton. NADPH becomes NADP+ once it surrenders its electron.
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An organism's genotype is (1 point)
O a trait that is expressed in a homozygous individual.
O an allele that is expressed whenever it is present.
O an observable trait.
O the set of alleles an organism has for a trait.
Answer:
4th option (last option)
How did the accurrences of the different traits change over the 30-year period? Use euidence from the graph to support your answer. Using what you know about natural selection and adaptation, what generalization can you make based on these changes?
When changes occur to face environmental pressures, they must increase the individual's fitness to be favored by natural selection and result in adaptation. Between 1950 and 1980, individuals with half their bodies covered by plates decreased, while individuals with their whole bodies covered by plates increased.
How are adaptation and natural selection related?
Adaptations can be understood as the way in which different organisms manage to improve their fitness in the environment in which they live. To do it, they must adjust to the changes and selective pressures acting on them.
Adaptations involve changes and are usually related to mutations (let us remember that mutations are changes in DNA nucleotide sequences).
These changes must be beneficial for the individuals, meaning they must increase their fitness and make them more competitive.
If they do not increase their fitness (aptitude) they get lost.
If they increase the individual's fitness, they are selected by natural selection and transmitted through generations.
When natural selection favors a mutation, it sets it in the population and is inherited by the following generations. These mutations improve the individual's survival and reproductive rates. Hence, natural selection results in adaptation.
Image explanation
In the exposed example, we can see how the percentage of plates covering the animal's body changed through time.
At the beginning of the study (the year 1950), most animals had half of their bodies covered by plates (green bar), and only a few individuals had 2/3 bodies protected (orange bar).
As the lake changed its clarity, stickleback fishes with only half of their bodies protected got probably more exposed and easily seen by their predators. Their survival and reproductive rates decreased. From 1950 to the end of the study, their population size decreased significantly.
Predation acted as the environmental pressure. So the fish species needed to face this problem.
By 1960, a few individuals developed a new strategy. Their whole bodies were protected by plates (blue bar). This phenotype meant an increase in their survival and reproductive rates, so this strategy spread more in the population. Natural selection favored this change and set it.
By 1980 most individuals had their whole bodies protected by plates, and only a few of them still had half of their bodies covered. Since this turned out to be a beneficial change, population size started to recover.
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A student is setting up an experiment. The student has 20 identical young plants and will try to answer this question how does the amount of water give it to these plants each day affect how tall the plants grow? 1.State an appropriate hypothesis for this experiment.2. Identify one condition other than identical young plants that should be held constant during the experiment. 3. Identify one measurement tool needed for this experiment and describe the type of data measured by this tool. Measurement tool:
Type of data measured by tool
1) Hypothesis: If the plant receives the same amount of water every day, it will grow taller than plants that receive different daily amounts of water. 2) Controlled variable: Light exposure. 3) Measurement tool: Millimeter ruler.
What is a hypothesis and controlled variables?
A hypothesis is a scientific conjecture, not verified, that requires corroboration. It is a claim of how it works a relationship between two or more variables.
The researcher hypothesizes to predict what is going on or what is expected to occur.
A hypothesis
• must be clear and comprehensive.
• must express the direct relationship between the involved variables.
• must be objective.
• must be testeable and falsifiable
Controlled variables are those that need to be kept constant during the experiment to avoid their effect on the results. These variables are the same in the control and all the experimental groups, so they can not influence the results.
In the exposed example,
Question ⇒ how does the amount of water given to these plants each day affect how tall the plants grow?
1) Hypothesis ⇒ If the plant receives the same amount of water every day, it will grow taller than plants that receive different daily amounts of water.
2) Controlled variables ⇒ soil pH, temperature, light exposure
3) Measurement tool ⇒ millimeter ruler
This tool is useful to measure the change in tall plants daily. Being millimetric helps the researcher get a more accurate measure of the plant changes in height during the whole experiment.
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When two molecules of water are oxidized by PSII, how many total hydrogens are generated in the thylakoid lumen?
When two molecules of water are oxidized by PSII, the total hydrogens generated in the thylakoid lumen is 4 hydrogen ions.
What are molecules?A molecule is de scribed as a group of two or more atoms held together by attractive forces known as chemical bonds.
The light reactions of photosynthesis occur in photosystems I, PSI, and photosystems II, PSII present in the thylakoid membrane of the chloroplast.
In the light reactions of photosynthesis, water molecules are oxidized to oxygen and ATP molecules are produced which drives the dark reactions of photosynthesis.
Thylakoids lumen are membrane-bound compartments inside chloroplasts and cyanobacteria which are the site of the light-dependent reactions of photosynthesis.
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A giant redwood tree captures sunlight with its leaves and uses that energy to create sugars to fuel cellular p Which characteristic of life does this trait best represent? O metabolism O response O growth and development O cellular organiz
Answer:
photosynthesis
Identify from which region of the vertebral column each vertebrae belongs to. What are the differences between the size of the body, vertebral foramen, and spinous processes?
Within the various regions of the spine, the vertebrae vary in size and shape, but they all follow similar structural patterns.
What is spine?Your spine, or backbone, is the central supporting structure of your body. It connects different parts of the musculoskeletal system. The spine helps us sit, stand, walk, twist and bend. Back injuries, spinal cord disorders, and other problems can damage the spine and cause back pain. The spine is the central supporting structure of our body. The spine is a chain of bones, but it is made flexible by elastic ligaments and intervertebral discs. The vertebrae are generally numbered and divided into different regions. Neck, chest, lumbar, sacrum, coccyx. Only the top 24 bones are movable.To learn more about spine from the given link :
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Picture 1 is a part of cervical vertebrae and picture 2 is a part of thoracic vertebrae.
What is cervical and thoracic vertebrae?
The C1–C7 vertebrae, which make up the cervical spine (neck area), are connected to one another by intervertebral discs. These discs provide the spine with mobility and serve as shock absorbers when people are moving around.There are 12 vertebrae in the thoracic area, identified as T1–T12. Spinal nerves emerge through a space created by the intervertebral discs, laminae, pedicles, and articular processes of neighboring vertebrae. Combined, the thoracic vertebrae form a kyphotic curvature.Difference between size of the body, vertebral foramen and spinous processes:
Regardless of body size, nearly all mammals have seven cervical vertebrae. This indicates that there are significant differences in the size of cervical vertebrae, ranging from the shrew's relatively short cervical vertebrae to the giraffe's neck's much lengthened vertebrae. Each cervical vertebra in a fully mature giraffe measures 11 inches in height.The spinal cord and its meninges are located in the vertebral foramen. The spinal cord is located in this spacious passageway that runs up and down inside each vertebra; it is commonly referred to as the spinal canal rather than the vertebral foramen.The lumbar spinous processes (LSP) provide a crucial anatomical and biomechanical purpose by anchoring the interspinous and supraspinous ligaments, as well as the intersegmental paraspinal muscles and safeguarding the neuronal structures in the spinal canal.Hence one is cervical vertebrae and the other is thoracic vertebrae.
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What most likely caused a substance to be solid
What advantages does a coelom provide the earthworm and the salamander?
Explanation:
The coelom refers to the body cavity derived from mesoderm germ layer and mainly found in multicellular animals and is positioned inside the body to surround and contain the digestive tract and other organs.
There are many advantages that coelom provides to the earthworm and the salamander. The digestive system of earthworms and salamanders is more complex, here coelomic fluid helps their body processes and assists as a hydrostatic skeleton.
The coelom's main advantage is its flexibility. The internal organs for example the heart, liver, lungs, and intestines develop, and they help to push into the coelom. The fluid of the coelom diminishes the organs for protecting the organs and also enables them to turn, bend, shift and move. In this way, coelom helps the animals internally to finish and run the system inside in the correct way. Coelom helps the earthworms and salamanders in building the correct system and protecting their organs to maintain and enable them to function properly.
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Please answer ,it’s due tomorrow!
After an experiment, Monica creates a graph that chose a direct linear relationship between the size of a fish and the amount of oxygen the fish uses. Describe this trend, in terms of the amount of oxygen that a fish would use, as it grows from being very small to very large.
Based o Monica's linear graph, the growth of the fish means more demand for oxygen.
How does an increase in body size affect the demand for nutrients by living organisms?An increase in body size increases the demand for nutrients in living organisms.
This is because an increase in the size of organisms or growth results in an increase in the number of cells, and the needs of each cell also increase.
Thus, for the direct linear relationship between the size of a fish and the amount of oxygen the fish uses, the demand for oxygen for the fish will increase with the increase in the size of the fish.
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Which of the following is an example of a structural adaption?
*
1 point
Spikes on a bearded dragon
Venom in snake bite
Green vs brown coloration
Mimicry
An example of structural adaptation is a spike on a bearded dragon (option A).
What is structural adaptation?Adaptation in biology is an instance of an organism undergoing change, or the structure or behavior that is changed.
Adaptation can either be structural or behavioural depending on the change that occurs:
An adaptation can be structural, meaning it is a physical part of the organism. An adaptation can also be behavioural, affecting the way an organism responds to its environment.
An example of a structural adaptation is the way some plants have adapted to life in dry, hot deserts. Plants called succulents have adapted to this climate by storing water in their short, thick stems and leaves.
Therefore, the possession of spikes on a bearded dragon is an example of structural adaptation.
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The sequence of nucleotides in mRNA is determined by the sequence of
nucleotides in
a. amino acids
b. DNA
c. tRNA
d. ribosomes
Answer:
DNA
Explanation:
The sequence of nucleotides in mRNA is determined by the sequence of nucleotides in DNA .
The process of copying of genetic information from DNA to RNA is called transcription , and it follows the complementarity .
For eg. - If DNA sequence is ATTCGA then the RNA sequence will be UAAGCU .
( Adenosine forms base pair with Uracil instead of Thymine in RNA )
QUESTION 1
Which of the following is FALSE about immunity?
A. T cells originate in the bone marrow and move into the thymus to mature
B. B cells only recognize processed antigens
C. Memory B and T cells are important in the secondary immune response and immunity
D. autoimmune diseases are when the immune system mounts an immune response to something in our own body that it should't
The statement B cells only recognize processed antigens is false about immunity. Therefore, option (B) is correct.
What are the functions of B-cells?Antigen presentation, costimulation, and cytokine production by B cells contribute to T-cell activation; affect tissue inflammation and antimicrobial defenses; and, most importantly, play the role of regulatory cells.
The two antigen-binding regions of B cell receptors are made up of four peptides, two of which are light chains and two of which are heavy chains. Heavy chains can be IgG, IgA, IgM, IgD, or IgE isotypes.
The B-cell is typically an important regulatory cell in the immune system; It acts by directly contributing to inflammatory pathways, supporting other mononuclear cells, producing antibodies, and antigen-presenting cells.
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(30-50 words) Is the sickle cell allele dominant or recessive? Explain. What is sickle cell trait?
List the steps in the process of family intervention and tell what happens at each step.
There are 5 steps to the process of family intervention which includes:
Self education - learn about the disease or conditionInvolve a moderator - Hire a professional interventionist who is skilled at handling the situationsBe direct - explain the impacts of the condition to the familyDiscuss consequences - talk about the ultimatums and what would happen for not seeking helpPropose treatment alternatives - propose other treatments or replacements for conditions or addictionManage expectations - remember there could be setbacks and incorporate plans for them.What are the process to family intervention?These are steps taken to ensure that family members undergo treatments necessary to help them recover from damaging habits and conditions harmful to health such as addictions, abuse, etc.
Some of these steps include Self education, being direct, discussing consequences, proposing treatments and managing expectations.
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Which of the following would
NOT be considered a woody
plant?
A. shrub
B. cacti this
C. tree
D. vine
Which type of blood vessel could be considered analogous to the main roads for a "delivery truck" that provides the materials the "factories" of your body need to work?
ventricle
vein
artery
aorta
Answer:
vein
Explanation:
Directions
Pour the water into the bowl. Mix in the dirt.
Place the small glass in the center of the bowl. The lip of the glass should stand taller than the dirt and water mixture, but shorter than the sides of the bowl.
Find a sunny spot outside. Place the bowl in direct sunlight.
Place the plastic wrap over the bowl. Put the rock in the center of the plastic wrap, directly over the cup. Gently push down on the rock until the sides of the plastic wrap slope at about a 45° angle. Secure the loose sides of the plastic wrap to the outside of the bowl.
Leave the bowl in the Sun for three or four hours.
Remove the plastic wrap. Look in the cup and in the bowl. Record your observations.
Respond to the questions below.
Questions
Answer the questions in the essay box below.
Is the water in the cup dirty? Why or why not?
What happened to the water in the bowl?
This project simulates a real world process. What does the plastic wrap represent? What does the water in the cup represent?
Which two parts of the water cycle are at work?
WILL MARK BRAINLIEST!!!!
Note that the experiment you are performing is known as "Solar water distillation" experiment.
The water in the cup is probably unclean because the dirt and water combination in the bowl filtered through the plastic wrap and into the cup via evaporation and condensation.
The plastic wrap represents the Earth's atmosphere, while the water in the cup represents purified water collected, or "distilled," by evaporation and condensation.
The water in the bowl would have evaporated and condensed on the inside of the plastic wrap, running down and into the cup. Evaporation and condensation are the two components of the water cycle at an action in this research.
What is the purpose of the above experiment?The goal of the preceding experiment is to illustrate and comprehend the process of solar water distillation, which is a method of purifying water using the energy of the sun.
The experiment replicates the evaporation and condensation processes, in which the sun's heat causes the water in the bowl to evaporate and then condenses on the plastic wrap, pouring down into the cup.
The dirt and contaminants in the water are left in the bowl, resulting in clean water in the cup. The experiment aids in understanding the fundamental concepts of solar stills and how they may be used to purify water in isolated places or during survival scenarios where access to clean water is limited.
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Answer:1. The water in the smaller bowl was not dirty because of condensation.
2. The water in the larger bowl was gone, but the dirt i put in it was still there
3. The water got into the smaller bowl because of codensation. The water in the big bowl got lifted from condensation and bounced off of the plastic wrap and landed in the small bowl.
4. The plastic wrap represents the Earth's atmosphere, while the water in the cup represents purified water collected, or "distilled," by evaporation and condensation.
5. The water in the bowl would have evaporated and condensed on the inside of the plastic wrap, running down and into the cup. Evaporation and condensation are the two components of the water cycle at an action in this research.
Explanation:
Which heart calves are open and which are closed when blood passes out of the right ventricle towards the lungs?
Answer:
When the left ventricle contracts, the right ventricle also contracts. This causes the pulmonary valve to open and the tricuspid valve to close. Blood flows out from the right ventricle to the lungs before it is returned to the left atrium as fresh, oxygenated blood.
Explanation:
