Which substance(s) crossed the dialysis membrane? Support your response with data-based evidence." glucose and iodine crossed the membrane since their size is smaller than the pore size of the membrane"
Which molecules remained inside of the dialysis bag?" starch
Did all of the molecules diffuse out of the bag into the beaker? Why or why not?" no, starch did not as its size is larger than the pore size of the membrane
Answers
The substances that crossed the dialysis membrane were glucose and iodine, as their size is smaller than the pore size of the membrane. This allowed them to diffuse through the membrane and into the beaker. However, starch remained inside of the dialysis bag because its size is larger than the pore size of the membrane, preventing it from diffusing out of the bag.
Therefore, not all of the molecules diffused out of the bag into the beaker. Only the glucose and iodine molecules were able to diffuse through the membrane due to their smaller size. The starch molecules were unable to diffuse through the membrane because of their larger size, causing them to remain inside of the dialysis bag.
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Related Questions
How do clastic rocks get different sizes of particles?
Answers
Answer:
Such material, called detritus, consists of fragments of rocks and minerals. When the energy of the transporting current is not strong enough to carry these particles, the particles drop out in the process of sedimentation. This type of sedimentary deposition is referred to as clastic sedimentation.
Answer:
Such material, called detritus, consists of fragments of rocks and minerals. When the energy of the transporting current is not strong enough to carry these particles, the particles drop out in the process of sedimentation. This type of sedimentary deposition is referred to as clastic sedimentation.
Explanation:
How are cardiac muscle cell and a nerve cell similar and different?
Answers
Answer:
Both are similar due to origin of the membrane voltage and impulse propagation whereas both are different in their function.
Explanation:
Cardiac muscle cell are similar to a nerve cell because both have the same origin of the membrane voltage and impulse propagation also occurs in the same manner whereas, cardiac muscle cell is different to a nerve cell because cardiac muscle cells form the cardiac muscular system while nerve cells form the nervous system. Muscle cells are responsible for the contraction and relaxation of heart while on the other hand, nerve cells are responsible for the transmitting of nerve impulses throughout the body.
when high levels of plasma calcium occur, the nurse is aware that the following hormone will be secreted:
Answers
When high levels of plasma calcium occur, the nurse would be aware that the hormone calcitonin is typically secreted.
Calcitonin is a hormone produced by the thyroid gland in response to elevated levels of calcium in the blood. Its primary function is to regulate calcium homeostasis by decreasing the concentration of calcium in the bloodstream. Calcitonin acts on the bones, kidneys, and intestines to reduce calcium levels through several mechanisms:Inhibition of bone resorption: Calcitonin inhibits the activity of osteoclasts, cells responsible for breaking down bone tissue. By suppressing osteoclast activity, calcitonin helps to prevent the release of calcium from bones into the bloodstream.Increased calcium excretion: Calcitonin promotes the excretion of calcium by the kidneys, reducing reabsorption and enhancing its elimination through urine.
By exerting these effects, calcitonin helps to regulate and lower plasma calcium levels when they are elevated. It works in opposition to another hormone called parathyroid hormone (PTH), which increases plasma calcium levels when they are low.
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As the human population spread out of Africa into new regions, genetic diversity Group of answer choices went up as an adaptation to new environments. went down because each expansion had a chance of leaving behind one or more genetic variants. maintained an equilibrium because population density stayed the same while territory expanded. varies randomly, do some populations has greatly increased variation while some had greatly decreased variation.
Answers
As the human population spread out of Africa into new regions, genetic diversity went down due each expansion had a chance of leaving behind one or more genetic variants.
What is genetic diversity?Genetic diversity makes reference to all gene pool that a population and/or species exhibit in a given environment.
Genetic diversity is fundamental to adapt new environmental conditions during migration.
In conclusion, as the human population spread out of Africa into new regions, genetic diversity went down because each expansion had a chance of leaving behind one or more genetic variants.
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Genetic diversity decreased as the human population migrated from Africa to other continents because each migration had a chance to obliterate one or more genetic variants.
What is genetic diversity?The term "genetic diversity" refers to the entire gene pool that a population or species possesses in a specific habitat.
During migration, genetic diversity is essential for adjusting to new environmental situations.
The genetic diversity decreased when the human population migrated from Africa to other continents since each migration had a chance of bringing with it one or more genetic variants.
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an abnormal communication between an artery and a vein is abbreviated as a (n)
Answers
An abnormal communication between an artery and a vein is abbreviated as an arteriovenous fistula (AV fistula). It is a connection that forms between an artery and a vein, bypassing the capillary system.
This can occur naturally in certain parts of the body, such as in the liver or the brain, but can also be caused by injury or surgical intervention. In some cases, an AV fistula may be created intentionally as part of a medical treatment, such as for dialysis or to improve blood flow in a limb. However, an AV fistula can also be a pathological condition that requires medical attention and treatment.
what is intervention?
In general, an intervention refers to an action taken to improve a situation or to prevent a problem from getting worse. The term intervention is used in a variety of fields, including medicine, psychology, social work, education, and politics.
In medicine, an intervention refers to a medical procedure or treatment that is performed to prevent, cure, or manage a health condition. Examples of medical interventions include surgery, chemotherapy, medication, physical therapy, and lifestyle changes such as diet and exercise.
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What is one thing that might affect the performance of a muzzleloader projectile.
Answers
Answer:
There are three variables that affect bullet performance–the powder, the bullet and the gun
The performance of a muzzleloader can be affected by muzzle velocity, gravity and aerodynamic drag. A projectile is a motion influenced by gravity and resistance.
What is Projectile Motion?A projectile is an object that is propelled by the application of an external force and the object moves freely under the influence of gravity and air resistance. They are commonly found in warfare and sports.
Round Ball: This is the traditional projectile used in the muzzleloader. Rapid loss of velocity and energy reduces their efficiency compared to the bullet. The performance of projectile shot from a firearm depends on the bullet weight or shot size, the design of the projectile, the materials used in manufacturing the projectile, and the amount of gunpowder.
A projectile is an object that is propelled by the application of an external force and then moves freely in the atmosphere forming a trajectory. This ballistic trajectory is referred to as the bullet path.
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_______16. Which of these lists presents the stages of the cell cycle in the correct order?
1. Interphase, mitosis, cytokinesis
2. Mitosis, interphase, cytokinesis
3. Cytokinesis, mitosis, interphase
4. Interphase, cytokinesis, mitosis
Answer the four questions please thanks
Answers
Thee stages of the cell cycle in the correct order is Interphase, mitosis, cytokinesis. Hence, the correct option is 1.
Interphase is the longest phase of the cell cycle during which the cell grows, replicates its DNA and prepares for cell division. It is divided into three stages: G1 (Gap 1), S (synthesis) and G2 (Gap 2). During G1, the cell grows and synthesizes RNA and proteins. During S phase, the cell replicates its DNA. During G2 phase, the cell grows and prepares for mitosis.
Mitosis is the second stage of the cell cycle, which is divided into four phases: prophase, metaphase, anaphase, and telophase. During mitosis, the replicated chromosomes condense and align along the cell's equator before being pulled apart by the spindle fibers.
Hence, the correct option is 1.
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CAN SOMEONE HELP PLEASE!
Which process results in specialized cells?
mitosis
meiosis
differentiation
morphogenesis
Answers
location of suppressed upwelling characteristic of the occurrence of el nino
Answers
It is characterized by the warming of the waters in the equatorial Pacific Ocean, which affects global weather patterns.
One of the key features of El Niño is a suppressed upwelling characteristic, which occurs in certain regions of the Pacific Ocean. Upwelling is a process by which colder, nutrient-rich water rises from the depths of the ocean to the surface. This is important for the growth of phytoplankton, which forms the base of the ocean food chain. El Nio affects local weather from Australia to South America and beyond as well as ocean temperatures, the strength and speed of ocean currents, the condition of coastal fisheries, and more. Unpredictably, El Nio events happen every two to seven years. But unlike ocean tides, which follow a known pattern, El Nio is not a regular cycle.
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Where does DNA to RNA transcription occur in prokaryotic cells?
Answers
Answer:
Nucleus
Explanation:
Transcription takes place in the nucleus. It uses DNA as a template to make an RNA molecule. RNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. Translation reads the genetic code in mRNA and makes a protein.
Answer:
In prokaryotic cells, there is no nucleus so transcription happens in the cytoplasm since that is where the DNA is.
Explanation:
temperature-sensitive mutations are useful in understanding essential life processes. a temperature-sensitive mutant is normal at a low temperature, but when shifted to a higher temperature it reveals its mutant phenotype. consider a plant with a temperature-sensitive mutation in the chloroplast's water-splitting complex. you grow the plant at a low temperature, then shift it to the higher temperature. what three outcomes you would expect to see after shifting temperature? (choose three.)
Answers
If a plant that has a water-splitting complex mutation that is temperature-sensitive is cultivated at a low temperature and then moved to a higher temperature.
Why do temperature-sensitive mutations occur?Mutations that are temperature-sensitive (Ts) are an effective technique for investigating how genes work in vivo. Ts mutants are commonly produced using random mutagenesis and time-consuming screening techniques.
What is a conditional mutation that is temperature-sensitive?Mutations known as temperature-sensitive (ts) mutations show a wild-type phenotype at normal temperature but a mutant phenotype at high or low temperatures. Geneticists can use temperature-sensitive mutants to their advantage, especially when researching critical genes.
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A farmer was working with dairy cattle at an agricultural experiment station. The
population of flies in the barn where the cattle lived was so large that the animals’
health was affected. So the farmer sprayed the barn and the cattle with a solution of
insecticide A. The insecticide killed nearly all the flies. Some time later, however,
the number of flies was again large. The farmer again sprayed with the insecticide.
The result was similar to that of the first spraying. Most, but not all, of the flies were
killed. Again, within a short time the population of flies increased, and they were
again sprayed with the insecticide. This sequence of events was repeated five times:
then it became apparent that insecticide A was becoming less and less effective in
killing the flies.
The farmer noted that one large batch of the insecticide solution had been made and
used in all the sprayings. Therefore he suggested the possibility that the insecticide
solution decomposed with age.
The farmer’s suggestion is that the insecticide decomposed with age. Briefly explain
how this suggestion could be tested.
Answers
The hypothesis by the farmer can be tested by conducting experiments using the aged insecticide on a new set of flies on another farm.
What is a hypothesis?A hypothesis is an explanations put forward to explain an observation.
Based on the observation that the insecticide became less effective, the farmer hypothesized that it was because the insecticide degraded with age.
This hypothesis can be tested by using the aged insecticide on a new set of flies on another farm.
Therefore, experiments can be used to confirm or disprove a hypothesis.
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Please help and thanks!
Answers
Answer:
a
c
b
Explanation:
After reviewing and analyzing Quintans experimental results, Janelle believe that his experiment contains errors which led to an incorrect conclusion which of the following explains what janelle can do to confirm her analysis of the experiment
Answers
She can replicate Quentin's experiment to see if she gets the same results to confirm her analysis of the experiment
What is analysis ?The analysis/goals discussion's are to clearly interpret the findings, examine what they might reveal about the issue in general, consider how your experimental design might have been improved, and consider what might come next in order to fully address the research topic.
Experimental data are statistically analysed to find errors and eliminate them. The errors are brought about by human error, such as a poor experimental design, or by measuring system flaws.Analyzing something involves dissecting it into its constituent elements in order to understand what each one does and how they work together.Learn more about Analysis here:
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Examine this cell from page 197 in your book, what has happened to this plant cell and why
Answers
This is the given structure of a cell which consist of different cell organelles such as nucleus, ribosomes, as well as golgi appratus.
Eukaryotic cells are characterized by the presence of a nucleus and other membrane-bound organelles, while prokaryotic cells do not have these structures.
Animal cells are distinguished by the presence of a cell membrane, cytoplasm, and various organelles, such as nucleus while plant cells have a cell wall in addition to these structures.
By making observations about these structures and organelles, the team would be able to classify the cells they examined as eukaryotic, prokaryotic, animal, or plant.
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these visual pathway cells have high temporal resolution but low spatial resolution
Answers
The visual pathway cells that have high temporal resolution but low spatial resolution are the rod cells in the retina.
Rod cells are specialized photoreceptor cells that are responsible for detecting low levels of light and are primarily used in low-light conditions such as at night or in dimly lit environments.
Rod cells have high temporal resolution, meaning that they are able to detect changes in light quickly and respond rapidly to changes in the visual environment.
However, they have low spatial resolution, which means that they are not able to distinguish fine details and are less sensitive to color than cone cells.
In bright light conditions, cone cells become the dominant photoreceptor cells and provide high spatial resolution and color vision, while rod cells become less sensitive and contribute less to visual processing.
Thus, these visual pathway cells have high temporal resolution but low spatial resolution.
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what strategy, taken to an extreme in organisms like humans and elephants, can increase an organisms fitness because, from the perspective of evolution, children must survive to the age of reproduction?
Answers
In species like humans and elephants, the use of excessive parental care can improve an organism's fitness.
Care can be advantageous if parents (1) increase offspring survival during the stage in which parents and offspring are connected, (2) enhance offspring quality in a way that increases offspring survival and/or reproduction in the future when parents are not connected with offspring, and/or (3) directly...
Parental care - which is defined as any parental behavior or adaptation that improves the fitness of the offspring, frequently at some cost to the caregiver, exhibits striking diversity among species, ranging from short-term and relatively simple behaviors, like egg attendance, to long-term and elaborate adaptations, like some forms of food.
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Which type of air pollution caused forests and aquatic ecosystems to die and cement infrastructure to be damaged?
Answers
The type of air pollution that can cause forests and aquatic ecosystems to die and damage cement infrastructure is known as acid rain.
Acid rain is formed when emissions from industrial activities and vehicles, such as sulfur dioxide (SO2) and nitrogen oxides (NOx), react with water vapor and other chemicals in the atmosphere. This reaction produces sulfuric acid and nitric acid, which then fall to the ground as rain, snow, fog, or dry particles.
Acid rain is harmful to forests and aquatic ecosystems because it increases the acidity of soil and water bodies. The increased acidity can leach important nutrients from the soil, making it difficult for plants and trees to grow. Additionally, acid rain can directly damage plant leaves and aquatic organisms. It can also acidify lakes, rivers, and streams, causing harm to fish, amphibians, and other aquatic life.
The sulfuric and nitric acids in acid rain can also corrode cement infrastructure, such as buildings, bridges, and statues. This is because the acids react with the calcium carbonate present in cement, causing it to break down and weaken the structure over time.
In conclusion, acid rain is the type of air pollution that can cause harm to forests, aquatic ecosystems, and cement infrastructure. It is important to reduce emissions of sulfur dioxide and nitrogen oxides to prevent and mitigate the effects of acid rain.
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The number of atoms of each element before the reaction and the number of atoms of each element after the reaction must be _______________
Answers
Answer:rearrange
Explanation:
Give some example of microorganisms
ASAP
Answers
Answer:
some examples of microorganisms
Bacteria.
Archaea.
Fungi.
Protozoa.
Algae.
Viruses.
Multicellular Animal Parasites.
GIVING 100PTS AND BRAINLIEST FOR CORRECT ANSWERS
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Identify 3 or more other biotic and abiotic limiting resources that might drive competition within a single species.
Answers
Answer:
Biotic: Food, predators, disease. Abiotic: water, temperature, soil
Hope this helped!
cystic fibrosis is the most common fatal genetic disease in north america and results in what type of allele located on chromosome 7?
Answers
Cystic fibrosis is caused by a mutation in the CFTR gene which is located on chromosome 7. The mutation results in a defective protein that disrupts the balance of salt and water in the body, leading to thick, sticky mucus that clogs the lungs, pancreas, and other organs.
This mutation is a recessive allele, meaning that a person needs to inherit two copies of the mutated gene (one from each parent) to develop the disease. This is why cystic fibrosis is more common in populations where there is a high frequency of carriers of the mutated gene. While there are treatments available to manage the symptoms of cystic fibrosis, there is currently no cure for the disease, making it the most common fatal genetic disease in North America.
Cystic fibrosis is the most common fatal genetic disease in North America. It results from a recessive allele located on chromosome 7. This means that an individual must inherit two copies of the mutated allele, one from each parent, to develop the disease.
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14. Which of the following is not true regarding when a neuron is at rest?
A. it is not conducting an action potential.
B. more sodium ions (Na+) outside the cell than inside the cell.
C. more potassium ions inside the cell than outside the cell.
D. more sodium ions inside the cell than outside the cell.
Answers
Answer: C.
Explanation: The way the pump functions is it intakes 3 sodium ions, and spits out two potassium, so when the neuron is at rest after firing, it has to spit out all the potassium in order to intake the sodium. It will slowly intake more potassium to make up for the deficit but when at rest, the potassium concentration is higher outside the cell.
 The tool that measures air pressure is called what?
Answers
Answer: A barometer !
Explanation:
Hoped this helped ! :)
Which molecule is most common in the human body?
A. H₂
B. N₂
C. H₂0
D. CO₂
Answers
Answer:
c) H₂0
Explanation:
H₂0 molecule (water) is the most common molecule in the human body. Hence, option (c) is the correct answer.
The ________ pathway connects the ventral tegmental area with the nucleus accumbens.
a. mesocortical
b. mesolimbic
c. nigrostriatal
d. corticofugal
e. spinothalamic
Answers
The b. mesolimbic pathway connects the ventral tegmental area with the nucleus accumbens.
Mesolimbic pathway: what is it?Dopamine is transported via the mesolimbic route from the VTA to the nucleus accumbens, amygdala, and hippocampus. It is thought that the nucleus accumbens, which is located in the ventral medial region of the striatum, is involved in the processes of reward, desire, and the placebo effect.
The brain's reward system is interconnected with regions responsible for behaviour and memory. Dopamine-releasing neurons in the ventral tegmental region are where pleasure is first felt. The brain starts to establish links between the conduct and the pleasure, making it more likely that we will engage in the behaviour again.
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How do guard cells maintain homeostasis?
Answers
Answer:
Explanation: Guard cells in the plants prevent water loss from it in cases of soil dryness or high temperature by closing themselves. If this does not happen, water will keep leaving the plant by the process of transpiration in these harsh conditions and the plant will not have the important medium for the homeostasis process to continue.
Which physical activity could an interactive video resource help you with?
geocaching
handsprings
striking
weight lifting
Answers
The interactive video resource is not found here but weight lifting is an excellent physical activity to improve muscular endurance.
What is muscular endurance?The expression 'muscular endurance' makes reference to the training programs aimed at enhancing muscular strength.
This property of training programs (muscular endurance) is fundamental for reaching a healthy physical state.
In conclusion, the interactive video resource is not found here but weight lifting is an excellent physical activity to improve muscular endurance.
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all cells that make up an organism contain the exact same dna sequence (genome) however individual cell-types look and function very differently. why?
Answers
While all cells in an organism contain the same DNA sequence (genome), not all genes are expressed in every cell type. The process by which genes are turned on or off in different cell types is called gene expression, and it is controlled by a variety of regulatory mechanisms.
One key regulatory mechanism is epigenetics. Epigenetic modifications can alter the structure of DNA, such as the addition or removal of chemical groups, without changing the underlying DNA sequence. These modifications can affect the accessibility of genes to transcription factors and RNA polymerase, which are responsible for initiating gene expression. Different cell types can have different patterns of epigenetic modifications, which can lead to differential gene expression.
Another regulatory mechanism is alternative splicing, which allows different variations of the same gene to be expressed in different cell types. During alternative splicing, different segments of the pre-mRNA are spliced together to create different mRNA transcripts, each of which can encode a different protein isoform.
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Do you think plants will grow better under a grow light or with the sun? Explain your answer.
Answers
Answer:
The Sun
Explanation:
I chose this because i think because the Sun is natural light and the grow light isn't it will grow better,