Add starch indicator solution to the water in the beaker. If the indicator solution changes color than starch is present.
An iodine indicator can be used to test whether starch has diffused through a membrane into a beaker by reacting with starch present to produce a blue-black color. However, starch molecules are generally too large to pass through the membrane. The iodine molecules, which are smaller, can do so and react with any starch within the bag.
Explanation:One can use an indicator such as iodine to test whether starch has diffused through the membrane into the beaker. Iodine reacts with starch to produce a blue-black color, serving as a clear visual indicator of the presence of starch. If the beaker's solution turns blue-black after adding iodine, this would suggest that starch has indeed diffused through the membrane.
However, you must remember that the dialysis tubing simulates a semi-permeable membrane, and larger molecules like starch often cannot pass through. The iodine, on the other hand, being a smaller molecule, can pass through the membrane and react with any starch present inside the bag to give the blue-black color.
To interpret the results, if the surrounding water in the beaker turns blue-black upon adding iodine, it can be inferred that starch has diffused out of the membrane, though unlikely. But if the color change is only observable within the dialysis bag, the starch did not pass through the membrane and has instead reacted with iodine that diffused into the bag.
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what is fertilization??
Why are functional MRI is useful to Doctors
They show which parts of the brain are involved in specific activities.
Assuming the options are:
They can ease pain in patients.
They can reduce tumors in patients.
-> They show which parts of the brain are involved in specific activities.
They distinguish between the possible causes of a symptom.
Magnetic resonance imaging is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body in both health and disease. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to generate images of the organs in the body.
A hyperlink is _____.
a word, symbol, image, or other object that links you to another element in another location
a list at the beginning of a publication that shows the main topics in a book or report and provides page numbers to quickly access material
a reference that appears at the top of every page in a document
a reference that appears at the end of the document
A hyperlink is a word, symbol, image, or other object that links you to another element in another location.
here is an example: https://brainly.com
Answer:
Option A, a word, symbol, image, or other object that links you to another element in another location
Explanation:
Basically any thing such as a word, statement , image , symbol or even a complete paragraph in a word, excel or power presentation can be hyperlinked to a any other content outside this file or any other file in any other folder but on the same system. A person clicking on hyperlink will land up on page /content/file/sheet associated with it.
Hence, option A is correct
How is plastic made?
Plastic is taken from the natural, organic substances called Cellulose, Coal, Natural Gas, salt and Crude oil.
Plastics are synthetic polymers that are most often made from petrochemical hydrocarbons.
Extraction of Raw Materials: The primary raw materials for making plastic are natural gas, crude oil, and coal. These materials contain hydrocarbons, which are crucial for the formation of plastic polymers.
Refining and Cracking: The raw materials are refined to separate the hydrocarbon molecules. In a process called cracking, large hydrocarbon molecules are broken down into smaller ones, often resulting in ethylene and propylene, which are essential monomers for plastic production.
Polymerization: The monomers are subjected to chemical processes like polymerization, where they are bonded together to form long chains of polymers. There are different methods of polymerization, such as addition polymerization and condensation polymerization.
Pelletizing: The polymer chains are then cooled and cut into small pieces or pellets. These pellets serve as the raw material for manufacturing various plastic products. They are typically melted again and molded into shapes through processes like injection molding, extrusion, or blow molding.
Manufacturing Products: The plastic pellets are heated and molded into final products such as bottles, bags, containers, toys, and numerous other items.
hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?
Hi,
Harshey and Chase did a great experimentation which was basically a two step experiment to prove that DNA and not proteins are the actual carriers of genetic information from parents to offspring.
In the first part of their experiment, they used bacteriophages (virus that eat bacteria). They used radioactively labeled sulphur(35S) medium to grow bacteriophages and observed that all the bacteriophages had proteins with radioactive sulphur(35S). In the next step they allowed these phages to infect bacteria and to their surprise, they found that the bacteria did not had radioactively labeled sulphur in them because the coat of bacteriophage stays outside the body of bacteria when it attacks it. This proved that DNA not proteins were the hereditary material. To make their results more reliable, they did a second experimentation in which, they marked the DNA of the phage with radioactive phosphorus 32P. After labeling DNA, they repeated the same experiment and this time, they found radioactive phosphorus inside the bacteria.This meant that the bacteria had DNA of phage entered inside them and this again proved that DNA not proteins are the hereditary material. You can see attached image for better understanding.
Hope it help!
Hershey and Chase conducted two experiments using bacteriophages. They labeled the bacteria's protein with radioactive sulfur and the DNA with radioactive phosphorus. By observing that only the radioactive DNA entered the bacterial cells, they provided evidence that DNA, not protein, is the genetic material.
Explanation:Hershey and Chase conducted two key experiments that provided evidence supporting the notion that DNA, not protein, constitutes the genetic material. For their experiments, they studied bacteriophages, viruses that infect bacteria, which have a simple structure composed of a protein coat and a nucleic acid core.
In the first experiment, they labeled the protein coat of the phage with radioactive sulfur (³5S), while in the second experiment, they labeled the DNA of the phage with radioactive phosphorus (32P). After allowing the phages to infect bacteria, they found that only the radioactive DNA, not the radioactive protein, had entered the bacterial cells. This observation led them to conclude that DNA, not protein, carried the information necessary for the replication of the phage within the bacterial host.
These findings were crucial in convincing the scientific community to accept DNA as the molecule responsible for heredity, thus confirming the role of DNA as the genetic material.
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Why are the core and mantle still so hot?Which layers of the earth are solid vs. liquid and why?
The mantle and core of the earth are still hot because of the pressure of the overlying earth layers. The deeper the layer the hotter it is due to higher pressure, in lieu of the fact that temperature and directly proportional. In addition, some of the heat from the time the earth was formed is still trapped inside the earth and nuclear decay of radioactive elements in the regions ensure the earth does not cool.
The mantle and outer core of the earth are liquid while the inner core is solid. The former layers are liquid because the temperatures in these regions have surpassed the melting point of the elements that make up the layers. However, the inner core remains solid due to the enormous pressure in the region. The pressure is so high it prevents the element in the region from melting.
What causes earthquakes?
A. Elastic rebound
B. frictional heating
C. The release of heat
D. The Richter scale
(Pls help!!!)
answer is - Fictional heating
What factors affect the amount of solar energy that reaches the Earth’s surface?
Well one big factor would be the ozone layer because it absorbs sun rays. Not sure about the rest.
Cystic fibrosis, a disease that causes an accumulation of mucus in the lungs, results when a person is homozygous recessive for the autosomal trait (ff). If two parents who do not have cystic fibrosis give birth to a baby with cystic fibrosis, what are the parents’ genotypes?
1)Ff,Ff
2)ff,ff
3)FF,Ff
4)FF,FF
#1 is the answer since there's a 25% chance that they will have a baby with Cystic fibrosis all the other answers would cause the baby to not have it or for the parents to have it.
Which is NOT a potential threat or danger to an ecosystem rich in biodiversity?
predators, since it is rich in biodiversity
Why do water droplets form on the outside of a glass of ice water??
It is because of condensation. When warm air hits the cold surface, it condenses, leaving droplets of water outside the glass.
Another way of putting it is, when water vapor in the air comes in contact with cold, like ice water, the molecules slow down and get closer together, causing the gaseous water vapor to turn back into liquid water droplets, which is condensation.
Condensation causes water droplets to form on the outside of a glass of ice water. This happens when warm, moist air comes into contact with the cold glass, cooling the air and reducing its ability to hold water vapor. Consequently, water vapor condenses to form water droplets on the glass's surface.
Explanation:Water droplets form on the outside of a glass of ice water due to a process called condensation. This process occurs when the warm, moist air outside comes in contact with the cold glass pane, causing the air to cool and its capacity to hold water vapor decreases. As a result, water vapor condenses to form liquid water, or droplets, on the exterior of the glass.
The fact that warm, moist air carries more water vapor than cold air is a fundamental principle of physics. It's also important to note that the actual amount of water vapor in the air does not change, only its relative capacity to hold water vapor, due to temperature changes.
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Which of the following uses a protein to move a molecule across a cell membrane without energy
I believe it would be option A. If it still doesn't answer your question, don't hesitate comment below. :)
Facilitated diffusion
Describe the journey of a single hydrogen atom from glucose in cellular respiration
Answer:
In cellular respiration, especially in the Krebs cycle, hydrogen is one of the many molecules present in glucose that become vital in order for energy, in the form of ATP, to be produced by the cell.
Originally, a molecule of glucose is conformed by 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Due to the chemical process of ATP production, which will give energy to cells, the hydrogen atoms from the glucose molecule will both procure the necessary electrons in order to energyze the process of ATP production, and generate waste products such as carbon dioxide and water. This happens thanks to the stimulating effects of the coenzymes NAD and FAD.
As such, the process would be: The hydrogen is bound to carbon molecules and oxygen, but given the right stimulus during cellular respiration, in the presence of further oxygen and coenzymes, in order to produce ATP, the bonds are broken and hydroxen is released from the glucose molecule. The chemical reactions, and the passage of the ions, will generate energy that will permit the production of ATP, and in the end, the leftover hydrogen atoms will combine with oxygen and carbon, again, to form carbon dioxide and water. This is, in a nutshell, what happens during the Krebs cycle.
Jordan notices that the bottom part of a cliff is worn away.
Why is the cliff worn away the most near or under the level where the water is?
Option C I'd say.
Hope you find it helpful!
The Water erosion is most intense at the base of a cliff because it carries sediments and abrasives, causing undercutting and erosion.
The wearing away of the bottom part of a cliff, particularly near or under the water level, is primarily attributed to the erosive forces of water.
This phenomenon is commonly associated with processes such as hydraulic action, abrasion, and solution, collectively known as coastal erosion.
1. Hydraulic Action: Water exerts pressure on the cliff, especially during high-energy events like waves crashing against the base. The force of the water can penetrate cracks and weaknesses in the rock, leading to erosion.
2. Abrasion: Sediments carried by the water, such as sand and pebbles, act as natural abrasives. These particles can impact and wear away the cliff face, causing physical weathering and contributing to the erosion process.
3. Solution: Some rocks, particularly those containing soluble minerals like limestone, can be dissolved by the chemical action of water. Over time, this dissolution weakens the rock structure, leading to erosion.
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What are Newton's 3 laws of Gravity? asap
His 3 laws of gravity are:
1.) Objects in motion tend to stay in motion and objects at rest tend to stay at rest unless acted upon by an unbalanced force (pushing something, moving it, someone or something moving it in some way.)
2.) Force equals mass x acceleration (f=ma)
3.) For every action, there is an equal and opposite reaction
Final answer:
Newton's laws of motion include the law of inertia, the relationship between force, mass, and acceleration, and the principle of action and reaction. The Universal Law of Gravitation states that every mass attracts every other mass with a force dependent on the product of their masses and the distance between them.
Explanation:
Newton's Three Laws of Motion and Universal Law of Gravitation
Sir Isaac Newton's contributions to physics include the three laws of motion and the Universal Law of Gravitation. Newtons's first law, often referred to as the law of inertia, states that an object will remain at rest or move at a constant velocity unless acted upon by an external force. Newton's second law provides the relationship between force, mass, and acceleration, indicating that force equals mass times acceleration (F=ma), which also defines the change in momentum. According to Newton's third law, for every action, there is an equal and opposite reaction, which addresses the nature of forces as interactions between two objects.
The Universal Law of Gravitation is distinct from Newton's three laws of motion but complements them in describing the motion of objects under the influence of gravity. This law states that every mass attracts every other mass with a force that is proportional to the product of their masses, inversely proportional to the square of the distance between their centers, and directed along the line connecting their centers. This law is crucial for understanding the orbits in the Solar System, the motions of satellites and spacecraft, and gravity with more than two bodies.
Which of the following forest management practices is best for reestablishing areas of forest?
C. Reforestation is the right answer
The _____ of an object is its location at a particular time.
A. position
B. direction
C. coordinate
D. reference point
Answer; C
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A. position The position of an object refers to its location at a specific point in time, differing from direction, coordinates or a reference point.
Explanation:In physics, the position of an object is its location at a particular time. This is the correct answer to the provided question. For example, if an object is sitting on a table, its position could be described as 'on the table'. Unlike direction, which indicates the path an object is moving, position represents a specific point in space where the object is located. Similarly, while coordinates can help to pinpoint a position, they are not synonymous with the term. Lastly, a reference point is a specific location used to define positions but is not the actual position of the object itself.
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Which statement best describes the structure of covalent network solids? A. They are giant structures held together by weak forces of attraction. B. All the atoms are covalently bonded to other atoms to form a lattice-like structure. C. Several covalently bonded molecules form covalent bonds with each other. D. They consist of a network of atoms alternately bonded by covalent and ionic bonds.
Try the answer B
Hope this helps
Answer: Option (B) is the correct answer.
Explanation:
A covalent compound is a compound formed by sharing of electrons. And, in a covalent network solid atoms are bonded by covalent bonds in a continuous network that is extending throughout the material or solid.
This continuous arrangement of atoms are like a lattice.
For example, diamond is a covalent network solid in which carbon atoms are arranged in a continuous lattice like structure.
Hence, we can conclude that the statement all the atoms are covalently bonded to other atoms to form a lattice-like structure, best describes the structure of covalent network solids.
Name two characteristics of the four inner planets
Mars, Venus, and Mercury they are called the terrestrial planets (plus earth) because these planets have the same elements as earth there surfaces are hard solid and rocky which features valleys, deserts and mountain...etc areas. and plus it was studied that all three planets have an iron core!
so yeah the four inner planets are : Mars, Venus, Mercury and Earth (and you can chose two from them.)
what type of molecule is hemoglobin
Hemoglobin consists of protein subunits (the "globin" molecules), and these proteins, in turn, are folded chains of a large number of different amino acids called polypeptides. The amino acid sequence of any polypeptide created by a cell is in turn determined by the stretches of DNA called genes.
Final answer:
Hemoglobin is a protein molecule with a heme group that contains iron, essential for oxygen transportation in the blood.
Explanation:
Hemoglobin is a complex protein molecule found in red blood cells, which is crucial for transporting oxygen throughout the body. It consists of four subunits, each made up of a polypeptide chain called globin and a heme group. The heme group contains an iron ion (Fe²⁺) that can bind to oxygen molecules. When all four iron ions in a hemoglobin molecule are bound to oxygen, the blood appears bright red, indicative of oxygenated arterial blood. Hemoglobin's ability to carry oxygen is due to its iron centers, which can only transport oxygen when in their reduced Fe²⁺ state, as oxidation to Fe³⁺ prevents the binding of oxygen.
scientists use squid nerve cells in research because the nerve cells of a squid are 1000 times fatter than those of a human. how is the outcome of the nervensearch most likely to be affected
Answer:
The outcome would be the same because in both cases a nerve cell is being researched.
Explanation:
biology help pleaseee ty
C) rate of division is correct answer.
Hope it helps;Pls mark as brainliest answer
There are 206 bones in the human body in comparison to the bones how many muscles does the human body have
Answer:
The human body has 650 muscles
Explanation:
The human body has more than 600 muscles.
In some systems, energy will transform from one form to another. Which of the following is an example of electrical energy bei transformed to both kinetic energy and sound energy?
A.) a television showing a movie
B.) a tree falling in the woods
C.) a remote control car being operated
D.) a radio playing music
What is CODIS? How does it work?
The Combined DNA Index System (CODIS) is the United States national DNA database created and maintained by the Federal Bureau of Investigation. CODIS consists of three levels of information; Local DNA Index Systems (LDIS) where DNA profiles originate, State DNA Index Systems (SDIS) which allows for laboratories within states to share information, and the National DNA Index System (NDIS) which allows states to compare DNA information with one another.
Answer:
CODIS stands for Combined DNA Index Systems and is a computer program that stores the DNA Fingerprint of convicted criminals and missing persons. This program is very useful in forensic science.
Explanation:
CODIS is a computer program maintained by the FBI, which operates databases across the country. These databases contain more than five million profiles. CODIS covers several different indices.
CODIS uses algorithms to compare 13 different locations in STRs, plus one that determines the gender of the person in question. The system has rules and safeguards to protect the privacy of people in the database. Algorithms that point to positive results - which must be confirmed by an analyst - can provide clues to the police or even identify a possible criminal. The downside of using CODIS is that it only covers the profiles it includes - and there are over a million profiles waiting to be included in the system.
As the difference in concentration between two areas increase does diffusion increase or decrease?
Diffusion is the movement of particles down their concentration gradient, meaning they flow from places of high concentration to places of low concentration.
Diffusion can be defined as the movement of substance from a area of higher concentration to area of lower concentration until the concentration gets equal across space.The difference between the concentration of molecules of the substance between two areas is said to be concentration gradient.As the difference in concentration increases, concentration gradient gets more steep thereby allowing more rapid diffusion to take place, which means diffusion increases.
1. A woman with hemophilia marries a man who does not have hemophilia. What are the possible phenotypes of their children?
2. A woman without hemophilia marries a man with hemophilia. They have a daughter with hemophilia. What is the genotype of the mother and father?
Children of a woman with hemophilia and a non-affected man are carriers, while children of a woman without hemophilia and a man with hemophilia have a 50% chance of having hemophilia.
Explanation:1. If a woman with hemophilia marries a man who does not have hemophilia, their children will all be carriers of the hemophilia gene. The sons will not have hemophilia, but will be carriers like their mother. The daughters have a 50% chance of being carriers and a 50% chance of not inheriting the hemophilia gene.
2. In this scenario, since the daughter has hemophilia, we know that the mother must be a carrier of the hemophilia gene. The father, who has hemophilia, can only contribute a Y chromosome to their daughter. Therefore, the father's genotype is XY and the mother's genotype is XhX, where X represents the normal version of the gene and Xh represents the hemophilia gene.
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Use the following DNA strand to help answer the following questions.
TAC CCC TAA GTG GGC GAT ATT
What mRNA sequence will be made from your DNA (use the DNA from above)?
a) TAC CCC TAA GTG GGC GAT ATT
b) ATG GGG ATT CAC CCG CTA TAA
c) AUG GGG AUU CAC CCG CUA UAA
d) UAC CCC UAA GUG GGC GAU AUU
Answer: B
because...
T pairs with A always
C pairs with G always in DNA
what always occurs when energy moves from one tropic level to the next higher one
Only about 10 percent of the energy available at one trophic level is passed on one to the next Energy is lost : • as heat from respiration • not consumed ( bones, fur,etc.) • as faces I hope this helped if not I’m sorry but yea
Toby is camping in a board ,u-shaped valley. The area was most likely created by