Acquired selection because you choose what traits are present and you acquire what traits you wanted.
Explain how an agarose gel can separate DNA fragments of different lengths.
Heyy There,
The negatively charged DNA can be pulled toward the positive field of the gel. 6. Explain how an agarose gel can separate DNA fragments of different lengths. Smaller fragments move faster, and therefore further, than larger fragments as they snake through the gel.
Have a nice day and good luck to u!!!!
DNA that is negatively charged can be drawn in that direction toward the gel's positive field. As they move through the gel, smaller fragments travel further and faster than larger fragments.
What is agarose gel?Agarose gel is a type of gel that is prepared from agarose particles. It is set in a container by adding warm water to it. A three-dimensional block is prepared which contains pores and channels to pass out biomolecules.
DNA is a genetic material that is a long fragment of bases and a hydrogen backbone. They are separate in agarose gel electrophoresis. When an electric current is given to the gel, the molecules move according to their size.
Thus, agarose gel separates the different sizes of fragments, as smaller fragments move faster than the larger fragments.
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How does the speed of sound change as it moves from the surface of the ocean to 1000 meters below to surface? 50 POINTS!!!!!
A. The speed increases because the water is less dense at warmer temperatures.
B. The speed decreases because the water is denser at warmer temperatures.
C. The speed increases because at cooler temperatures the water has more mechanical energy.
D. The speed decreases because at cooler temperatures the water has less mechanical energy.
Answer by YourHope:
Hi! :)
How does the speed of sound change as it moves from the surface of the ocean to 1000 meters below to surface?
D.) The speed decreases because at cooler temperatures the water has less mechanical energy!
:)
After about 1,000 meters, the increasing pressure compensates for the cold temperature, and the more dense water increase the speed of sound again. That should explain the answer :)
The pop-up question at the end of this level asks whether an animal or a plant is more closely related to a fungus.
Answer:
Although apparently it may look that fungi are more related to plants than the animals but the fact is quite opposite.
Explanation:
The molecular phylogenetic analysis is an excellent tool to find out the correct ancestor and evolutionary history of organisms. The molecular phylogenetic studies have depicted that fungi are more related to animals than to the plants. Please see attached figure.
Here are some of the many similarities between animals and fungi:
Both are eukaryotes that means they have proper organelles bonded by proper membranes.Both need energy from the sun for their survival but are unable to use that sunlight for the production of food (heterotrophs).Both do not contain photosynthetic pigments called chlorophylls in their cells.Hope it help!
Fungi are more closely related to animals than plants. They are heterotrophic, use complex organic compounds for energy, and share traits with animals. Fungi play a crucial role in ecosystems by breaking down organic materials.
Explanation:Fungi, once considered plant-like organisms, are more closely related to animals than plants. Fungi are heterotrophic and use complex organic compounds as sources of energy and carbon. They also share traits with animals such as having chitin in their cell walls, producing pigments like melanin, and storing carbohydrates as glycogen. Fungi play a vital role in ecosystems by acting as decomposers and breaking down organic materials into simple molecules.
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Error Analysis: What might be the reason that some of your percentages didn't exactly match your predicted results? Gametes aren't responsible for inheritance. Mice don't have large litters, so the sample size was not large enough. The wrong type of mice were used.
Mice don't have large litters, so the sample size was not large enough.
Sample size is important in a research study:
The margin of error decreases as the sample size increases.Researchers can control the danger of reporting false-negative or false-positive results by using larger sample sizes. The precision of the results will increase with the number of samples used.A Type II error happens when the study's findings support the original hypothesis when an alternate one is more likely to be correct. A too-small sample size raises the chance that a Type II error would distort the results, lowering the study's power.The sample size was insufficient because mice don't have huge litters.
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No black peppered moths have been found before 1845. Where did this black moth came from? Why was black moth not found before
in 1845 was around the time the industrial revolution began, so when this happened the black smoke coming from the factories turned most of the trees a darker color. which in turn caused a population shift since the dark peppered months were now the ones less frequently preyed on.
No black peppered moths have been found before 1845,
comes from genetic variation due to mutationthese were not found before these were rare and eaten by predators as easily found on the light bark of trees.Genetic variationdifferences in sequences of genes between individual organisms of a species.specific mutation turned moths black during the Industrial Revolution in 1845 in order to survivethe bark of trees become dark and light moths were easily found.before 1845 bark of trees were light so black moths were visible to birds eat them so they become rare.Thus, No black peppered moths have been found before 1845,
come from genetic variation due to mutationthese were not found before these were rare and eaten by predators as easily found on the light bark of trees.Learn more:
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Raya is a gardening enthusiast who is looking to buy a new house. She wonders whether her house plants will grow well if she buys an apartment on a higher floor. She remembers that her friend Jenn also has a small garden on her balcony, and her plants seem healthy. Raya conducts an experiment to study the effect of altitude on the growth of plants. She gathers plant samples and places them on five different floors of a 20-story building. Identify the basic components of Raya’s experiment, including the confounding variable.
Raya's experiment involves an independent variable (altitude), a dependent variable (plant growth), and controlled variables to study the effect of altitude on plant growth.
In Raya's experiment, the independent variable is the altitude or the floor level in the 20-story building where she places the plant samples. She manipulates this variable to create different altitudinal conditions. The dependent variable is the growth of the plant samples, which she measures through various parameters.
To ensure the experiment's reliability, Raya controls other factors that could potentially impact plant growth, such as plant species, light exposure, temperature, humidity, and watering frequency. By keeping these variables constant or controlled, she can attribute any differences in plant growth to the altitudinal variations, helping her assess whether higher floors in the building affect plant growth differently than lower ones.
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The surface area/volume ratio is an important factor for one celled organisms. As a cell's volume grows, its surface area/volume ratio decreases, making it harder and harder to acquire enough nutrients via diffusion. Because of this, cells stop growing after reaching a certain size. After reaching this state, a one celled organism is likely to
A) enter into a spore state
B)continue to grow until it is so big it burst
C)use mitosis to diced and create daughter cells
D)stop eating that it shrinks and it’s surface area/volume ratio grows
Answer:
The most appropriate answer is option C.
Mitosis refers to a cell division in which a parent cell divides to give rise to two equal daughter cells. It helps in the growth and repair of tissues in multicellular organisms.
Once the cell has increased its size significantly, it undergoes mitosis to divide into smaller daughter cells.
It increases the area to volume ratio of the cell and helps the cell to get nutrition from a simple process such as diffusion.
4. what is the p-wave shadow zone and what causes it
The shadow zone is the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves. The shadow zone results from S waves being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core.
The P-wave shadow zone is an area where seismic P-waves cannot be detected, caused by their refraction when passing from the mantle into the Earth's liquid outer core. Both P-waves and S-waves are affected by the liquid core, causing seismic shadow zones.
Explanation:The P-wave shadow zone is a specific area of the Earth, located more than 104 degrees from an earthquake's epicenter, where P-waves (primarily longitudinal seismic waves) cannot be detected. It's caused by the refraction, or bending, of these waves while going through different layers of the Earth's interior, specifically the transition from the solid mantle to the liquid outer core. This bending prevents P-waves from recording at seismograph stations situated within this shadow zone.
Even though P-waves travel faster than S-waves (transverse waves), they are both affected by the Earth's liquid core. S-waves cannot be supported by the liquid core at all, causing a separate shadow zone, while P-waves can transverse it, but are refracted, causing their shadow zone.
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As ATP binds to the myosin head at the beginning of a muscle contraction cycle, the myosin head immediately
A. detaches from actin.
B. initiates binding with actin.
C. tightens its bond to actin.
D. swivels.
i dunno but i think its b
true or false?
The Chesapeake Bay Watershed drains water into the Pacific Ocean.
The Chesapeake Bay Watershed drains water into the Pacific Ocean. This statement is false.
The Chesapeake Bay Watershed is in the states of Virginia and Maryland. Those are on the east coast of the United States. These would drain into the ocean on the east coast. The Altantic Ocean is on the east coast. The Chesapeake Bay Watershed drains water into the Atlantic Ocean.
Hi!
Answer:
False
Why:
The Pacific ocean is on the west coast of the U.S. while chesapeake bay is on the east coast of the U.S. Which makes the question false.
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Match each element with its important function. 1. break down of food into energy calcium 2. absorb x-rays in bones sodium 3. cell membrane function carbon 4. all organic compounds oxygen
1. Break down of Food into Energy [tex]\implies[/tex] Oxygen
2. Absorb X - Rays in Bones [tex]\implies[/tex] Calcium
3. Cell Membrane Function [tex]\implies[/tex] Sodium
4. All Organic Compounds [tex]\implies[/tex] Carbon
Answer:
1. break down of food into energy => oxygen
2. absorb x-rays in bones => calcium
3. cell membrane function => sodium
4. all organic compounds => carbon
Explanation:
Oxygen in an element which is required during cellular respiration which in turn generates energy in the form of ATP. Aerobic respiration is not possible in the absence of oxygen.
Calcium is an element which is abundantly present in bones and has great tendency to absorb x rays. It is because of calcium that our bones appear white when they are exposed to x rays.
Sodium ion is present in cells and play a very important role in maintaining cell membrane potential with the help of sodium potassium pump.
Carbon is an important element because it is an important constituent of all organic compounds. All organic compounds are chemically hydrocarbons i.e. compounds having short or long chains of carbon and hydrogen.
Genes that are linked together _____.
A. combine to form traits
B. result in incomplete chromosomes
C. form dominant traits
D. are found on a particular chromosome
genes that are linked together combine to form traits
Explain why the loss of topsoil and the extinction of living species are a threat to increased food production
because top soil is very good for growing plants and the loss of animals can effect because some animals help the plants grow!
The insertion of a human DNA fragment into a bacterial cell might make it possible for what
The insertion of human DNA into bacterial cells enables these cells to produce medicinal proteins such as insulin and clotting factors, advancing the treatment of genetic diseases and revolutionizing biotechnology.
The insertion of a human DNA fragment into a bacterial cell can transform the bacterium into a tiny factory that produces medicinal proteins. This process, enabled by recombinant DNA technology, involves introducing a desired piece of DNA into a bacterial host using plasmids or bacteriophages as vehicles. Once inside, the foreign DNA can lead to the production of insulin, clotting factors, enzymes, hormones, vitamins, antibodies, and vaccines, significantly advancing the treatment and potential cures for various genetic diseases.
Examples of successful applications include the synthesis of tissue plasminogen activator in E. coli to aid heart attack victims and vaccines against diseases like hepatitis B. The technique not only contributes to medicine by producing vital therapeutic proteins but has also revolutionized biotechnology by allowing for precise genetic modifications.
What is the maximum temperature for holding cold, potentially hazardous food? A. 35 degrees B. 40 degrees C. 41 degrees D. 45 degrees
The correct answer is option C, that is, 41 degrees.
The time and temperature are the most essential elements for monitoring the growth of disease-causing bacteria in food. The temperature danger zone lies in between 40 degrees F and 140 degrees F. It is recommended to keep the hot food hot and cold food cold, and there is a need to use the thermometer in order to check the temperatures of the food.
The potentially hazardous foods must go through the temperature danger zone as briskly as possible. The maximum temperature for holding cold, potentially hazardous food is 41 degrees F.
The maximum temperature for holding cold, potentially hazardous food is 41 degrees. This is to prevent the growth and multiplication of bacteria and other harmful microorganisms.
Explanation:The question is, 'What is the maximum temperature for holding cold, potentially hazardous food?' The correct answer is C. 41 degrees. The concern with cold, potentially hazardous food is the growth of bacteria and other microorganisms.
Microorganisms can multiply at temperatures above refrigeration and below minimum cooking temperatures. Refrigerated products, such as potentially hazardous food, should ideally stay within a temperature range of 0 °C to 7 °C as these temperatures hinder bacterial growth. However, if necessary, such products can be held at temperatures up to 41°F (5°C), beyond which the risk of bacterial growth significantly increases.
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Lisa lives in a city that has an average monthly rainfall of 71 millimeters. It has warm summers, and is hottest during July, with an average high temperature of 81°F. The winters are very cold. Lisa’s friend Julia lives in a city with an average monthly precipitation of 270 millimeters. It is warm all year. Julia’s city is in a ? climate, while Lisa’s city is in a ? climate.
Lisa lives in a city, which is a part of the dry climate types. It is most probably a place where the temperatures in the summers are high, and in winter are very low. The place probably would be far from the sea, due to which the rainfall does not reach this place, and thus having a symbolic amount of annual rainfall. Lisa's most probably would be living in a city has a continental climate.
On the other hand, Lisa's friend Julia lives in a city that has an average monthly rainfall of 270 millimeters, it is warm throughout the year, and thus would be possessing higher humidity. On seeing the information, Julia would be living in a city has a tropical climate.
During the adult years, ____ can adversely affect the immune system. undernutrition overnutrition excessive iron intake obesity all of these choices are correct.
The answer to the blank space in the question is (D) all of these choices are correct.
Undernutrition will impact the immune system adversely since the body cannot fight off the infections due to the lack of nutrients. While, over nutrition and excessive iron intake would cause an imbalance to the body which would also influence the immune system negatively. Thus, all these options would be harmful to the immune system.
The part of plants that contains structures needed to absorb sunlight and carbon dioxide is the
The part of plants that contains structures needed to absorb sunlight and carbon dioxide is the chloroplast. Chloroplast would be the part in a plant to where it would absorb and be attracted by sulight and carbon dioxide.
What is the likely advantage of growing a genetically modified variety of corn that possesses its own pesticide?
The corn will be able to repel disease and insects that would otherwise be able to damage or kill the corn plant. The corn will not require any pesticide to do this, so it saves the grower of that corn money that would have been spent on pesticide.
Answer:
B) It is more efficient and economical to grow this variety.
Explanation:
Need Help ASAP 20 pts and will award brainiest.
In a multicellular organism, what are the levels of organisms from smallest to largest, and what is their relationship to one another
cells, tissues, organs, organ systems
The function of an organ system depends on the integrated activity of its organs
Some cells, like mature nerve cells or muscle cells, do not divide. other cells will divide only when the cellular environment signals that it is necessary. according to model 1, what "phase" of the cell cycle are these cells said to be in when they are not dividing or planning to divide?
Synthesis is when they are not dividing
Cells not dividing are in the G0 phase, a quiescent state where they remain inactive until certain conditions or signals prompt them to enter the G1 phase; some cells may remain in G0 permanently.
Cells that do not divide, such as mature nerve cells or muscle cells, or cells that divide only under certain conditions, are said to be in the G0 phase (pronounced 'G-zero'). In this phase, cells are in a quiescent (inactive) state, having exited the cell cycle. Certain cells may temporarily enter the G0 phase due to environmental conditions or lack of growth signals, and will only proceed to the G1 phase upon receiving an external trigger. Cells like mature cardiac muscle cells and nerve cells may remain permanently in the G0 phase, ceasing to divide.
Which scenario would most likely NOT lead to speciation?
A) A flood washes a few lizards or insects to a new island.
B) Neighboring herds of elk misinterpret each other’s mating behaviors, causing them to fight instead of mate.
C) Varieties of flowering plants produce pollen in different seasons causing them to be unable to pollinate one another.
D) The rock pocket mice with the dark fur gene mutation survive best on the dark lava flows because they are camouflaged from predators, unlike their lighter counterparts.
IT'S NOT C! I TRIED!! ;(
Final answer:
The scenario that would most likely NOT lead to speciation is when neighboring herds of elk misinterpret each other’s mating behaviors, causing them to fight instead of mate.
Explanation:
The scenario that would most likely NOT lead to speciation is B) Neighboring herds of elk misinterpreting each other’s mating behaviors, causing them to fight instead of mate.
Speciation occurs when populations of the same species become reproductively isolated from each other, leading to the formation of new species. This can happen through various mechanisms such as geographic isolation, genetic mutations, or behavioral differences.
In the given scenario, although the elk herds may experience some disruption in their mating behaviors, it is not likely to result in reproductive isolation and the formation of new species. It is possible that the herds may eventually adjust their behaviors and successfully mate, maintaining genetic continuity within the same species.
What system is responsible for defending the body against harmful substances? A.Circulatory system b.Musclar system c.Endocrine system d.Immune system
The right option is; d. Immune system
The immune system is responsible for defending the body against harmful substances.
The immune system is the body’s defense system that protects the body against infectious pathogens and other invaders. The immune system is composed of many biological structures (special cells, proteins, tissues, and organs) and processes that functions together to protect the body. White blood cells are one of the important cells of the immune system that destroy harmful substances or disease-causing organisms that invade body systems.
Which of the following is most closely identical to the formation of twins?
A) cell cloning
B) therapeutic cloning
C) use of adult stem cells
D) embryo transfer
E) organismal cloning
The correct answer is option E, that is, organismal cloning.
The procedure of generating genetically similar individuals of an organism either artificially or naturally is known as cloning. The reproductive cloning or organismal cloning is the process of producing a novel multicellular organism, genetically similar to another. Primarily, this kind of cloning is an asexual reproduction process, where inter-gamete contact or fertilization do not occur. Thus, the process is most closely similar to the formation of twins.
Glycolysis takes place in the cytoplasm of the cell, If enough oxygen gas is present, the next steps of cellular respiration will take place in what organelle?
If oxygen is present, the pyruvate molecules move to the mitochondrial matrix
The factor(s) that determine the duration of a twitch in various types of fibers is the speed of the
A. removal of Ca2+ ions from the sarcoplasm only.
B. hydrolysis of ATP only.
C. movement of Na+ across their membranes only.
D. removal of Ca2+ ions from the sarcoplasm and hydrolysis of ATP.
E. removal of Ca2+ ions from the sarcoplasm and hydrolysis of ATP and movement of Na+ across their membranes.
Hai :3
Interesting question about physiology.
The duration of a twitch in various types of fibers is the speed of the removal of Calcium ions from the sarcoplasm. Therefore, your answer should be A.
Write a letter to your parents explaining how you received your Gene's. I have attached the assignment below. Can someone help please.
write if you look like your mom or dad and how they look like to you
How might trawling affect marine biodiversity?
Experimental studies generally use the before/after control/impact design. In this approach, an experimental area is trawled and compared before and after trawling (before/after comparison) and with a site that has not been trawled recently (control/impact comparison). This design often involves direct sampling of fauna, video observations, and sonar scans of the control and disturbed sites.
Answer:
It decreases biodiversity by harvesting everything in its path, so that unwanted fish are unnecessarily killed.
Explanation:
Trawling is the method of fishing with the help of using a trawl net which is pulled by a boat. This method of fishing traps everything that comes in its path.
While marine biodiversity refers to the number of different species present in a particular ecosystem.
Since trawling catches everything which comes in its path so a lot of unwanted species also get caught, thus affecting the marine biodiversity.
Which characteristic of water allows it to absorb large amounts of energy without a large rise in temperature
The high specific heat of the water allows the restriction to the change in temperature.
The specific heat can be defined as the energy required for raising one degree Celsius of one-unit mass of the matter. the water is known to have a specific heat. The high specific heat of the water allows the water to absorb a large amount of eat or other form of energy and the temperature is not changed very much. this property of water makes it fit for survival of the organisms, especially the aquatic ones.
Answer:
Its high specific heat
Explanation:
Drugs to reduce the risk of rejection are given to organ transplant patients because patients because the donated organ contains?
Answer:
When a person receives a transplant, the immune system recognizes the transplanted organ as foreign. This is because the immune system discovers that the antigens in the cells of said transplanted organ are different. This non-compatibility triggers a transplant rejection.
Explanation:
The immune system protects the body from harmful substances such as microorganisms, toxins, etc. These substances have proteins known as antigens, which cover their surface. When these antigens are inside the body, the immune system recognizes that they do not belong to the body and attacks them. This happens in the case of transplants. To prevent this, doctors check both the donor and the person who will receive it. This typification ensures that the organ is as equal as possible to the tissues of the organ's recipient.
"The correct answer is that the donated organ contains foreign antigens that can trigger an immune response in the recipient's body.
When an organ is transplanted from one individual to another, the recipient's immune system recognizes the donated organ as foreign due to the presence of different antigens on the cells of the organ. These antigens, which include major histocompatibility complex (MHC) molecules among others, are proteins that are unique to each individual and are used by the immune system to distinguish between self and non-self.
The immune system's natural response to the presence of foreign antigens is to mount an attack to eliminate what it perceives as a threat. This response, known as the immune rejection, can damage or even destroy the transplanted organ if not properly managed.
To prevent rejection, transplant patients are given immunosuppressive drugs that reduce the activity of the immune system. These drugs help to protect the donated organ by decreasing the immune response against the foreign antigens, thereby reducing the risk of rejection and improving the chances of a successful transplant.
In summary, drugs to reduce the risk of rejection are given to organ transplant patients because the donated organ contains foreign antigens that would otherwise trigger an immune response leading to rejection of the organ. Immunosuppressive therapy is essential in managing this response to ensure the survival of the transplanted organ within the recipient's body."