answer please it's urgent​

Answer:

the age of the material

thank you

Answer:

the age of the material

Explanation:

The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.

A mutation is a sudden and lasting alteration in the DNA sequence that can influence genetic variation. Changes in the DNA sequence can influence phenotype, which may or may not have an effect on an organism's fitness. Mutations occur spontaneously, either from errors in DNA replication or from exposure to mutagenic agents. Mutations may happen in either coding or non-coding regions of the DNA, and they can be either silent or expressed.

Evolution is a natural process that results in the gradual change of inherited characteristics in populations over generations. It is the process of alteration in the inherited characteristics of species over successive generations. In other words, it is the process of gradual changes that happen to species over time as they adapt to their environments. It can be defined as a change in the gene frequency in a population over time.

Types of Evolution 1. Natural Selection 2. Genetic Drift 3. Gene Flow 4. Mutation 5. Non-Random Mating 6. Admixture 7. Mutation Pressure 8. Genetic Draft 9. Bottleneck and Founder Effect 10. Sexual Selection the process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.

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Your answer is D: Warm air above the ocean rises, making room for cooler air from the land.

But, why? The short answer would be that during the night, the ocean loses heat and that heat goes into the atmosphere. As this happens, winds from the land blow towards the ocean to replace that heat, leading to that wonderful nightly breeze at the beach.

Hope the explanation helped clarify a bit!

Answer:

chemical change

Explanation:

the log is a new substance now

Answer:

It shows that when wood burns, it combines with oxygen and changes not only to ashes but also to carbon dioxide and water vapor. The gases float off into the air, leaving behind just the ashes. Suppose you had measured the mass of the wood before it burned and the mass of the ashes after it burn. Have a nice day:)

The velocity of blood flow is lowest in capillaries because: The total cross-sectional area of the capillaries is greater than the total cross-sectional area of the arteries or any other part of the circulatory system. The correct option is D.

Blood flow velocity and total blood vessel cross-sectional area are inversely related. The velocity of flow reduces as the vessels' overall cross-sectional area grows. The capillaries, where blood flow is the slowest, provide time for the exchange of gases and nutrients.

Therefore, "The overall cross-sectional area of the capillaries is greater than the total cross-sectional area of the arteries or any other portion of the circulatory system" is the right response.

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The symbiotic relationship between a clownfish and a sea anemone is mutualistic, where both species benefit from the association.

Clownfish and sea anemones form a mutualistic symbiotic relationship. Clownfish, also known as anemonefish, live among the tentacles of sea anemones. This relationship benefits both species involved.

The clownfish receives protection from predators by seeking refuge within the stinging tentacles of the sea anemone. The sea anemone's tentacles provide a safe haven for the clownfish, deterring potential threats. In return, the clownfish provides benefits to the sea anemone. They defend the sea anemone against polyp-eating fish by chasing them away, and they also provide nutrients through their waste products, which serve as a source of food for the sea anemone.

Additionally, clownfish attract other fish to the sea anemone, which enhances the anemone's chances of capturing prey. The clownfish also help to aerate the sea anemone's tentacles by constantly swimming around them, improving water circulation and ensuring the availability of oxygen.

This mutualistic relationship is an excellent example of how two different species can rely on each other for survival and mutual benefits.

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Experimental Design is the type of research design that enables the research to control factors and variables related to the research problem.

A research design is a plan for a research project. It contains the methods, equipment, and procedures used to conduct the research. It aids in locating and solving potential issues that may come up while conducting study and evaluation.

The technique of doing research in a methodical, controlled manner—known as experimental design which ensures that accuracy is maximised and that particular inferences about a research hypotheses can be made. Typically, the goal is to determine the impact a variable, independent variable, or dependent variable has on another.

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Answer:

The most plausible explanation is that the different types of cells had different rates of absorption and retention of the radioactive iodine. Cells with higher levels of radioactivity after treatment may have had higher rates of absorption and/or retention than other cells, resulting in a higher concentration of iodine within the cell.

Explanation:

If a scientist isolates genes for Hepatitus B antigens from a Hepatitus virus, then inserts them into a bacterial plasmid and replicates the bacteria in a fermenter, the product collected will be transgenic bacterial plasmids, inside the bacteria, in order to proove if the transgenic plasmid actually gives the bacteria resistance to the virus, it has to be grown in an infected medium.

The correct answer is option A.

The wildlife biologist caught 150 fish.

A scientist that focuses on the study of wildlife, their habitats, and their interactions with the environment is known as a wildlife biologist.

Let's assume that the variable "x" stands for the quantity of fish caught.

18 fish, or 12% of the total number of fish collected, have tags, according to the information provided.

This can be written mathematically as:

18 = 0.12 * x

To find the value of "x," we can solve this equation for "x." Dividing both sides of the equation by 0.12 gives us:

x = 18 / 0.12

Performing the calculation:

x = 150

Therefore, approximately 150 fish were caught

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Answer:

Without hydrogen bonds, water molecules would move faster more rapidly, with less input of heat energy, causing the temperature to increase more for each calorie of heat added.

Explanation: This would also greatly reduce the amount of heat energy needed for phase changes from ice to liquid, and from liquid to vapor.

Answer: Not really a question but....Two molecules of water can form a hydrogen bond between them that is to say oxygen-hydrogen bonding; the simplest case, when only two molecules are present, is called the water dimer and is often used as a model system.

Clay is often the most challenging soil to grow on because it holds the most nutrients but also because plants may not be able to access them easily. In addition, silt retains more nutrients than sand.

Cation Exchange Capacity

The interaction of different chemical components that occurs between soil particles and in the soil solution is known as soil chemistry (the water retained by soil). Similar to how they hold onto water, soils also hold onto nutrients. The negative charges on soil particles attract positively charged nutrient molecules, or cations. Adsorption is the term for this. Cation-exchange sites are the locations where cations bind to particles.

The term "cation-exchange capacity" refers to the capacity to store cation nutrients (CEC). Negatively charged colloids in the soil have the capacity to hold onto nutrients and stop them from penetrating beyond plant roots. A soil is more likely to have higher fertility levels if it has a higher cation-exchange capacity. CEC is a reliable indication of soil quality and production when used in conjunction with other measurements of soil fertility (Chapman, 1965).

Because clay soils have more surface area (more cation-exchange sites) for nutrients to adsorb to, they retain more nutrients than coarser/sandier soils, just as clay soils contain more water. Positively charged particles are drawn to and held by negatively charged sites in organic matter as well. Sandalloid soils therefore rely on the presence of organic matter to raise their cation-exchange capacity.

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Answer:

it depends on what the season is and how it's approaching where you live

Answer:

When the bile ducts become blocked, bile builds up in the liver, and jaundice (yellow color of the skin) develops due to the increasing level of bilirubin in the blood.

Source: MedinePlus

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The large intestine is the major site where water and electrolytes are absorbed, and feces form from the indigestible components of food.

The large intestine, also known as the colon, is responsible for the final stages of digestion and absorption in the gastrointestinal tract. Its main functions include the absorption of water and electrolytes and the formation of feces from indigestible components of food.

As undigested material passes from the small intestine into the large intestine, the large intestine absorbs water, electrolytes (such as sodium, potassium, and chloride), and some vitamins produced by gut bacteria. This absorption helps in maintaining the body's fluid balance and electrolyte levels. The colon also serves as a site for the fermentation of certain indigestible carbohydrates by gut bacteria, producing short-chain fatty acids that provide energy to the cells lining the colon.

The remaining indigestible components, along with bacteria, mucus, and cellular debris, gradually move through the large intestine, where water absorption continues. As water is extracted, the contents become more solid, and feces are formed. Feces primarily consist of undigested food residues, bacteria, water, electrolytes, and waste products. The feces are eventually eliminated from the body during defecation.

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Net primary productivity (NPP) can be defined as the amount of energy produced by autotrophs that is available for transfer to higher trophic levels.

Autotrophs, such as plants and algae, produce energy through the process of photosynthesis by converting sunlight, water, and carbon dioxide into organic compounds. This energy is then utilized by the autotrophs for their growth, maintenance, and reproduction.

However, not all the energy produced by autotrophs can be transferred to higher trophic levels, as a portion of it is consumed for their own metabolic processes. Net primary productivity is the remaining energy after these processes have taken place, which is then accessible to heterotrophs (such as herbivores) in the ecosystem.

To calculate NPP, we subtract the energy used by autotrophs for autotrophs (R) from the gross primary productivity (GPP), which is the total amount of energy produced by autotrophs. The formula for this is: NPP = GPP - R.

In summary, net primary productivity represents the energy available for transfer to higher trophic levels within an ecosystem, which ultimately determines the energy flow and the overall health of the ecosystem.

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Understanding gas and vapours in a work setting is incredibly important for workplace safety. Gas and vapours can contain noxious substances that, if exposed to, can lead to serious injury or health implications.

In order to prevent such accidents, employers must perform risk assessments in order to assess and identify any areas of risk and put in place control measures to limit them. If gas and vapours are used onsite, then suitable ventilation and extraction systems should be in place.

Employers should also ensure that their staff are aware of the potential risks associated with such substances and provide adequate training and instruction in how to work safely. Finally, employers should also check that any necessary personal protective equipment is provided and communications are in place to be able to notify relevant emergancy responders in case of an accident.

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For locomotion, eating, and respiration, echinoderms like starfish and sea urchins have tube feet, a system of fluid-filled tubes and appendages.

The marine organisms known as echinoderms include starfish, sea urchins, and sea cucumbers. Echinoderms are distinguished by having a water vascular system that aids in breathing, eating, and locomotion. The system consists of tube feet, which are a group of fluid-filled canals and appendages. The entry to the animal's water circulatory system is the madreporite, a tiny plate that resembles a sieve. When the animal's muscles contract, water is taken into the system through the madreporite and then circulated through the canals and tube feet. The tube feet include calcareous deposits that help them perform their functions as feet for movement, eating, and respiration. Echinoderms may move and change their position by adjusting the water pressure in their tube feet.

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When a molecule is biologically molecule synthesized, there will be a monomer unit converted into the polymer, so there is a change in molecule randomness so entropy is decreased, hence option b is correct.

When a biological molecule is synthesized the monomeric unit is converted into the polymeric unit and there will be a synthesis of bonds.

In a biological system, the system moves towards the spontaneous system, and the change in entropy should be increased. The biological system works only when it is a thermodynamically active system.

All the chemical reactions are held to move towards the equilibrium state when a biological molecule is synthesized change in the entropy of the system is decreased but a change in the entropy of the surroundings increases.

Therefore during the synthesis of biological molecules, entropy is decreased, hence option b is correct.

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The radius of "sb0" is the smallest of the species listed.

The letters "sb" appear to stand for various elements or species, while the numbers after "sb" denote various forms or isotopes of that species. The radius of "sb0" is the smallest of the available choices.

It is most likely an isotope or variant of the chemical element antimony (Sb) when the word "sb0" is used. The amount of neutrons in the nuclei of various isotopes of an element can change the size or radius of the atom. In this instance, "sb0" stands for the antimony isotope with the shortest radius among the available alternatives.

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Meth is typically detectable in urine for up to 72 hours after the last dose. Because methamphetamine metabolizes to amphetamine, both drugs are likely to show up on a drug test.

The typical detection window for stimulants of the amphetamine type in urine is 3 to 5 days following the last administration.

In heavy, chronic users, this period might be longer; it might be seen in the urine for as long as a week.

Tests on the hair, blood, and oral fluids can also be used to identify meth users. For detecting recent ingestion, blood and oral fluid testing can be more effective and precise than urine testing, but both have shorter detection windows than urine testing. Depending on the type of hair test utilized, meth can be detected up to 90 days after the last use. Clinical or workplace testing typically do not use it because they are more appropriate for forensic or research study testing.

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The gastrointestinal (GI) tract, along with your liver, pancreas, and gallbladder, make up your digestive system.

The GI tract is made up of a number of interconnected hollow organs that extend from your mouth to your anus.

Your mouth, esophagus, stomach, small intestine, large intestine, and anus are the organs that make up your GI tract, in the order that they are joined.

Your digestive system is specially designed to carry out its function of converting food into the nutrients and energy you require to exist. After that, it conveniently compresses your solid waste, or stool, for disposal the next time you have a bowel movement.

Therefore, The gastrointestinal (GI) tract, along with your liver, pancreas, and gallbladder, make up your digestive system.

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Answer:

(A): using muscle contraction and enzymes to break down food

Explanation:

at least on my end

Answer:

Answer:

it floats

Explanation: it has the density lesser than water so i dosen't sink

Due to their mating preferences, the frogs in the isolated contact region were successfully isolated from other populations and had a notably distinctive call.

Males have a larger and more developed larynx than females, however these differences are not very noticeable. The two sorts of calls that frogs make—release calling and mating calling—are the subjects of the majority of investigations. To attract pregnant female frogs, mating calls can only be produced by male frogs.

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The above is about Biochemical Cycles. The information that comletes the table as well as describes Photosynthesis Equation are given below.

Adds CO₂

Removes CO₂

The word equation for Photosynthesis is:

Carbon Dioxide + Water + Sunlight → Glucose + Oxygen

Note that CO₂   is removed form the surface of the Earth via physical processes such as dissolution in the ocean via chemical weathering o frocks.

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The type of cell response that would take the longest amount of time to execute would be one that involves a change in gene expression.

This is because gene expression is a complex process that requires the transcription of DNA into mRNA and the subsequent translation of this mRNA into proteins.

This process can take anywhere from minutes to hours to complete, depending on the complexity of the gene, the amount of related proteins, and the availability of necessary materials for transcription and translation.

Additionally, the regulation of gene expression is a highly regulated and coordinated process, further adding to the time required for this type of cell response.

In comparison, other types of cell responses such as the release of secretory vesicles, the stimulation of lamellipodia formation, or the use of phosphorylation events to activate an enzyme, are faster and can be completed in minutes or even seconds.

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Answer:

Both DNA and RNA are made from nucleotides, each containing a five-carbon sugar backbone, a phosphate group, and a nitrogen base. DNA provides the code for the cell's activities, while RNA converts that code into proteins to carry out cellular functions.

Both the blue sea and the dolphin are made up of atoms.

The term atom has to do with the smallest particle of a substance that could take part in a chemical reaction. We know that all substances in the universe are composed of atoms. Atoms are found in the food we eat, the clothes we wear and even in the air we breathe.

As such atoms are everywhere in the universe. Living things are also composed of different kinds of atoms in differing proportions. Looking at the image as we can see it, there is the blue sea and there is a dolphin. Both the blue sea and the dolphin are made up of atoms.

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Answer:

A

Explanation:

if you calculate 6 m/s2 and 5 kg you get 10N

but you have to round and you get 11n

Answer: 30

Explanation:

5 x 6 = 30