what do the descending tracts of the spinal cord contain? white matter and transmit sensory information white matter and transmit motor commands grey matter and transmit sensory information grey matter and transmit motor commands

Rivers can originate from various sources, including:

Springs

Glaciers

Lakes

Wetlands

Rainfall

Melting snow

Mountains

Underground aquifers

Calcium in the sarcoplasmic reticulum is related to muscle contraction and motor unit recruitment as: the nerves that innervate the muscle fibers of the unit release acetylcholine, which leads to depolarization and the action potential. The greater the recruitment of motor units, the stronger the muscle contraction.

Calcium ions are essential in muscle contraction. The sarcoplasmic reticulum (SR) is the key component in regulating calcium ion concentration in the myoplasm, ensuring that calcium is available when required for contraction.

Skeletal muscles have calcium ions that are found in the sarcoplasmic reticulum (SR), a network of intracellular tubules that surrounds each muscle fiber's contractile components. The muscle action potential triggers an intracellular wave of calcium release from the SR to the myoplasm, which initiates contraction.

Calcium ions bind to troponin, which is an inhibitory protein in the actin filament. Calcium binding causes the tropomyosin to change its position on the actin filament, exposing the myosin-binding sites on actin. The myosin cross-bridges then attach to the actin filaments, pulling them towards the center of the sarcomere, and causing contraction.

Calcium ions are reuptake into the SR by an ATP-dependent pump, terminating contraction. Once the action potential has arrived, the SR releases calcium ions, which bind to the actin filaments and initiates muscle contraction. During a muscle contraction, more motor units are recruited, causing more muscle fibers to contract.

Muscle fibers are thus activated by the nervous system. In a motor unit, the nerves that innervate the muscle fibers of the unit release acetylcholine, which leads to depolarization and the action potential. Calcium ions are subsequently released from the SR, and the contraction cycle begins. The greater the recruitment of motor units, the stronger the muscle contraction.

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Option A: Cup-shaped vision organ, compared to the primitive flat patch of sensory cells, resembles eye and this provide the support that modern organism can rely on the model of complex eye organ.

Individuals in a population who are well-adapted to a specific set of environmental conditions have an advantage over those who are not as well-adapted through the process of natural selection. These people pass on their genes and desirable traits to their kids, providing the same advantages to the progeny.

Natural selection affects every structure of an organ like the eye over many generations, leading to a gradual improvement. Each minor modification to a structure depends on modifications to all the other structures. Individual components of a system develop cooperatively in this way to be compatible from a structural and functional standpoint.

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Complete question is:

The documentary presents a series of possible “intermediary steps” in the formation of a complex eye organ. Explain why natural selection would favor each of these changes, and give an example of a modern organism that still relies on that design.

a. Cup-shaped vision organ, compared to the primitive flat patch of sensory cells.

b. Constricted eye openings.

c. A clear convex lens in front of the opening.

A mutation caused by a piece of DNA breaking away from its chromosome and becoming attached to a non-homologous chromosome is translocation.

Translocation is a type of genetic alteration when a segment of one chromosome separates and joins another. Chromosomes from different species can occasionally swap portions with one another. Refer the image for the same.

Medical conditions include leukaemia, breast cancer, schizophrenia, muscular dystrophy, and Down syndrome may result from translocations. The term "mutation" refers to an organism's abrupt, stable, discontinuous, and inheritable alterations brought on by a permanent change in genotype.

Normally, a genetic mutation modifies the messages that are sent by a gene. Just the number of positions of genes that are already present are changed by chromosomal mutation.

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Answer:

The correct answer is —- abiotic

Explanation:

Sunlight, air, precipitation, minerals, and soil are some examples of abiotic factors. These factors have a significant impact on the survival and reproduction of species in an ecosystem.

C: abiotic

Explanation: k12 test 1.05

No, everyone's journey in the carbon cycle game will not be the same due to the complex interactions and processes involved.

This is because the carbon cycle game is designed to simulate the complex interactions and processes that occur in the real carbon cycle, which can vary depending on a variety of factors such as location, climate, and human activity.

Players will make decisions throughout the game that can affect their carbon footprint and the carbon cycle, such as choosing transportation options, land use, and energy sources. These decisions will affect the amount of carbon that is released or stored in various parts of the carbon cycle. Additionally, chance events such as natural disasters can impact the game and create different outcomes for different players.

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If your dog mates with another dog that is homozygous recessive for both genes and lacks both traits, you should expect 0% of puppies to have both of these dominant traits (tan saddle and curly hair)

Mendelian inheritance or Mendelian genetics refers to the fundamental principles of inheritance that Gregor Mendel proposed in his studies of pea plants' genetic patterns. Mendel is regarded as the father of genetics, as he laid the foundation for the study of inheritance patterns in offspring.

Mendel's studies on pea plants' inheritance patterns established several fundamental principles of heredity, including dominance, segregation, and independent assortment. Mendelian inheritance principles dictate how traits are transmitted from parents to offspring, and in which ratios, dominant and recessive alleles will be inherited.

If a heterozygous parent (Tt) and a homozygous recessive parent (tt) are crossed, the expected ratio of offspring with the dominant trait to those without the dominant trait is 1:1.Only the genotype Tt will result in the dominant trait. Since your dog is heterozygous for both dominant alleles, the genotypic ratio of its offspring with the homozygous recessive dog will be Tt:tt= 1:1.

As a result, none of the offspring will have both of these dominant traits (tan saddle and curly hair) that you see in your dog, and the expected percentage of puppies with both of these dominant traits will be 0%.

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The underlying genetic cause is a chromosomal abnormality, rather than a specific gene mutation.

Chromosomes are thread-like structures made of DNA and proteins that are found in the nucleus of a cell. They carry genetic information in the form of genes, which are segments of DNA that code for specific traits or characteristics. Chromosomes come in pairs, with one copy inherited from each parent. In humans, there are 23 pairs of chromosomes, for a total of 46 chromosomes in most cells. The first 22 pairs are known as autosomes, and they are numbered in order of size from largest to smallest. The 23rd pair is known as the sex chromosomes, and they determine the biological sex of an individual. Females have two copies of the X chromosome (XX), while males have one X and one Y chromosome (XY).

Here,

3. It is not possible to determine the sex of the individual based on the information provided.

4. The diploid number cannot be determined from the karyotype image as the number and identity of the chromosomes are not visible.

5. Based on the information provided in the karyotype, there are 22 autosomes present. One pair of sex chromosomes is present.

6. The chromosome set with the abnormality cannot be determined from the information provided.

7. Down Syndrome is caused by the presence of an extra copy of chromosome 21, resulting in a total of three copies of chromosome 21 in each cell instead of the usual two copies. This is also known as trisomy 21. The extra genetic material on chromosome 21 can cause a range of physical and developmental features, such as intellectual disability, characteristic facial features, and an increased risk for certain health conditions.

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Answer:

Because meat is fairly simple to digest, carnivores have very short digestive systems, which results in high stomach acid levels. In contrast, herbivores have extensive digestive systems, which result in delayed digestion and high stomach acid levels.

Carnivores have a very short digestive system, because meat is very easy to digest. They have very high acid levels in their stomachs.

Herbivores have very long digestive systems, because plants are very difficult to digest. They have low acid levels in their stomachs, or even a neutral PH. Various species use different methods of extracting nutrition from plants. Some re-ingest their feces, and pass everything through their digestive system twice. Some have fermentation chambers in their intestinal tracts, and use bacteria to break down the plants. (Hindgut and foregut fermentation). Some soften plants, the regurgitate and re-chew them once.

Omnivores tend to have digestive systems that are in between, and ideally suited to neither plants nor animals. They have acidic stomachs, but no always as acidic as carnivores. The length of their lower intestinal tract varies (animals that eat more plants have a longer lower gut).

Carnivores cannot live off of plants because they have such a short lower gut, they cannot ferment the plant matter, or extract many nutrients from it.

Herbivores can extract nutrients from meat, but their bodies are specialized to extract protein from plants, and meat represent an overload. Too much meat, and their organs cannot keep up with the protein overload. Plus, it basically rots inside of them, due to the low acid level. Still, many herbivores eat meat on occasion, often for the calcium in animal bones.

Thank you,

Eddie E.

The kangaroo rat is a nocturnal rodent that lives in the deserts of North America. To survive the cold desert nights, kangaroo rats have evolved various strategies for thermoregulation.

However, it is difficult to determine whether the kangaroo rat is more similar to the rattlesnake or the hummingbird in its strategies for keeping warm at night, as these animals have different ways of regulating their body temperature.

Rattlesnakes are ectothermic animals, meaning that their body temperature is primarily regulated by their external environment. In contrast, hummingbirds are endothermic animals, meaning that they can generate their own body heat through metabolic processes.

Kangaroo rats are also endothermic, and they have several adaptations to conserve body heat at night, such as reducing their activity levels and lowering their metabolic rate. They also have specialized kidneys that can concentrate urine to conserve water, which is important for maintaining their body temperature.

Therefore, it is more accurate to say that the kangaroo rat is more similar to the hummingbird in its strategies for keeping warm at night, as they are both endothermic animals that can generate their own body heat. However, it is important to note that the strategies used by these animals are different due to their unique physiological and ecological adaptations.

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any allele that can hide the presence of a different allele

Answer:

Only one allele determines the phenotype

Explanation:

There are 2-6 nucleοtides wοuld be inserted οr deleted in each, 3 aminο acids in the prοtein sequence wοuld be altered in each.

DNA is a genetic cοmpοnent οf a cell that cοntains the instructiοns needed fοr an οrganism tο develοp and perfοrm its functiοns. With the usage οf DNA mοlecules, this knοwledge is passed dοwn frοm οne generatiοn tο the next.

An aminο acid-based cοmpοund. The bοdy cannοt functiοn cοrrectly withοut prοteins. They serve as the building blοcks fοr variοus chemicals like enzymes, cytοkines, and antibοdies as well as fοr bοdy tissues like skin and hair.

Therefοre, there are 2-6 nucleοtides wοuld be inserted οr deleted in each, 3 aminο acids in the prοtein sequence wοuld be altered in each.

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Water is a polar molecule, meaning it has a partially positive end (hydrogen atoms) and a partially negative end (oxygen atom).

This polarity results from an unequal sharing of electrons between the atoms in the water molecule. As a result, the partially positive hydrogen atoms of one water molecule are attracted to the partially negative oxygen atoms of another water molecule, forming hydrogen bonds.

The attraction between the partially positive and partially negative ends of water molecules is important for many biological processes. For example, hydrogen bonds between water molecules contribute to the surface tension of water, allowing insects to walk on water. Hydrogen bonding also plays a key role in the folding of proteins and the structure of DNA, which are essential for the functioning of cells.

Overall, the ability of water molecules to form hydrogen bonds is a fundamental property of water that underlies many of its unique properties and makes it essential for life on Earth.

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The Peclet number for the transport of a drug in tissue is 0. 1, the dominant mechanism of transport is Diffusive transport.

Diffusive transport is a far more sophisticated mechanism than convective transport in porous electrodes. The electrochemical reactions that occur within the catalyst layer's three border zones consume the reactants to produce the end products. This results in component concentration gradients inside the catalyst layer and throughout the gas diffusion layer. The concentration gradients are the primary drivers of species diffusive movement.

The Péclet number is a class of dimensionless numbers that may be used to explore transport processes in a continuum. It is defined as the ratio of a physical quantity's rate of advection by flow to the rate of diffusion of the same quantity driven by an appropriate gradient.

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The diagram is the representation of a fat molecule forming through dehydration synthesis

Dehydration synthesis (also known as condensation reaction) is a chemical reaction in which two molecules are joined together covalently with the removal of a water molecule. In this reaction, one molecule gives up a hydroxyl group (-OH) and the other gives up a hydrogen atom (-H) to form a new molecule and a water molecule.

Dehydration synthesis is a common process in biochemistry, where it is used to build larger molecules such as carbohydrates, proteins, and nucleic acids.

For example, when two amino acids combine to form a dipeptide, a water molecule is removed during the reaction. Similarly, when monosaccharides combine to form disaccharides, such as glucose and fructose forming sucrose, a water molecule is removed as well.

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Oceanic crust is generally composed of dark-colored rocks called basalt and gabbro.

Mid-ocean ridges constantly produce new oceanic crust. Magma rises into the upper mantle and crust at these ridges where continental plates separate. The freshly created rocks cool and begin to disintegrate as the continental plates move away from the ridge, and silt slowly begins to accumulate on top of them. The oceanic ridges are home to the youngest oceanic rocks, and as you move away from the ridges, the rocks grow older and older.

The mantle cools and melts as it rises, and as the pressure drops, it passes the solidus. The temperature of the mantle as it increases is the single factor affecting how much melt is created.

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The structural features that are common to all tRNAs are the cloverleaf pattern with three stem-loops, acceptor stem for amino acid attachment, and a, p, and e sites. Therefore, the correct answer is "cloverleaf pattern with three stem-loops, acceptor stem for amino acid attachment, and a, p, and e sites."

tRNA or transfer RNA is a type of RNA that plays a critical role in protein synthesis. It helps in the transfer of amino acids from the cytoplasmic pool to the growing polypeptide chain, which is critical for the formation of proteins.

There are several types of tRNAs, each of which is distinct in terms of its amino acid binding capacity and anticodon sequence. Although they are not entirely alike, all tRNAs have specific structural features that make them useful in protein synthesis.

The following are the common structural features of all tRNAs: Cloverleaf pattern with three stem-loops: The characteristic cloverleaf shape of tRNA is due to the presence of three stem-loops. This shape is critical for tRNA functionality.

The T stem loop is responsible for amino acid attachment, while the D stem loop is responsible for aminoacyl-tRNA synthetase recognition. An acceptor stem: A single-stranded stem is present at the 3' end of tRNA, which is used to accept and bind with the appropriate amino acid.

The sequence of the acceptor stem is responsible for specificity in amino acid selection. a, p, and e sites: These are ribosomal binding sites that help in the elongation of the growing polypeptide chain. They also help in the decoding of the mRNA sequence by anticodon complementarity. Therefore, these sites are critical for translation.

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Answer:

A. Cats have trouble thermoregulating

Explanation:

Answer:

Wastes and now the remains largely of dead organic matter would accumulate, and the nutrients in the waste and dead organisms would not be released back into the environment. The producers would not have had enough nutrients.

The most likely explanation is that the dead remains of plants and animals have undergone decomposition by decomposers, such as bacteria, fungi, and other organisms, breaking down organic matter into simpler compounds and recycling nutrients back into the ecosystem.

In nature, dead organisms and organic materials are typically decomposed by a process called decomposition. Decomposers, which include bacteria, fungi, and other organisms, play a crucial role in breaking down dead plant and animal matter into simpler compounds. These decomposers feed on the organic material, breaking it down through chemical processes and releasing nutrients back into the environment.

Decomposition is a natural and essential part of nutrient cycling in ecosystems. When organisms die, decomposers quickly begin the process of breaking down the organic matter. They secrete enzymes that break down complex organic compounds into smaller molecules that they can absorb as nutrients. As decomposition progresses, the organic matter is further broken down into simpler compounds like carbon dioxide, water, and various nutrients.

The nutrients released during decomposition, such as nitrogen, phosphorus, and other essential elements, become available for uptake by plants and other organisms. This nutrient recycling is vital for the growth and survival of living organisms, as it ensures the continual availability of essential resources in the ecosystem.

Therefore, in the scenario you described, where there are no visible dead remains of plants and animals, the most plausible explanation is that the dead materials have undergone decomposition by decomposers. These decomposers efficiently break down the organic matter, recycling the nutrients and ensuring a clean and clear environment. Without decomposition, the accumulation of dead remains would lead to an unhealthy and unsustainable environment.

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Answer:

See explain

Explanation:

This is a difficult question to give an answer to because of the fact that this is supposed to pertain to your own personal life so I will give you some tips and examples hopefully to help you better understand your assignment:

Your teacher is asking you to create a personal narrative (a story) about yourself in which one of the themes from the story The Great Gatsby is present. First, start by looking at the themes your teacher provided about The Great Gatsby and think about if you have any stories about yourself you would be okay with sharing that embody that theme, for example for the pursuit of the American Dream theme you may choose a story about how you fought for an internship or job or education so you could propel your individual success through your freedom or a story about how you learned about society and class in society through viewing others lives as another example, (a little unethical but this story you choose doesn't need to be real so you can make up a realistic story maybe mixed with some truth about something you 'experienced'). After you've picked a theme, write a story about yourself in first person (use words like I did this I spoke to 'whomever' or I walked and not 'Pepe did this or 'Pepe spoke to him') that makes sure to embody the theme you've chosen and make sure to include:

A title that relates to the chosen theme of your narrative

Elements of the story (other people, a conflict about something pertaining to your theme and story, a setting in which all the events take place (like school, and can change during the course of the story), a plot which is a storyline (a good way to understand plot for a story which is important is to think about the series of events you want your character to go through in order) and make sure that the theme you've chosen is a good fit for your story and that it will fit the message your story is trying to get across)

The dialog which is talking and chatting between characters (I spoke to Dave and told him 'No!')

Description which is all the details (the details of the setting like the time of day, what day it is, your shirt and clothes, who the person is that you're talking to and why they're important and all the small details about the events and yourself and the people and places around you)

Finally, a reflection which will normally take place at the end of the story after the events have happened your character will reflect on the events and the importance of what has taken place and what you will take from the experience and whatnot)

If you have any other questions or need of assistance, you can also reply to this answer and I will try my best to get back when I can :)

Answer:

-Proper composting of the organic waste we generate in our daily lives -inedible or unused food can reduce the dependence on chemical fertilizers, help recover soil fertility, and improve water retention and the delivery of nutrients to plants.

Explanation: Composting converts organic matter into a nutrient-rich soil known as compost.

Benefits of composting: Recycling of organic wastes into nutrients that enter back into the soil takes place. The need to buy expensive fertilizers is reduced.

Before bacteria to multiply, their cell size must increase. Bacteria increase as the simulation progresses because they are in a fertile habitat.

Antibiotics destroy critical bacterial cell structures or functions. This either kills the organism or prevents it from developing. Based on these findings, an antibiotic is characterized as either bactericidal or bacteriostatic.

Antibiotic use has been linked to an increase in inheritable mechanisms such mutation, recombination, gene transfer, and prophage production 112-121. These changes must, of course, be fixed for evolution to be relevant, and fixation can only occur when bacteria are selected for.

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Encouraging youth participation in the democratic process is essential for a healthy and vibrant democracy.

Reducing the voting age: Making the voting age 16 or 17 is one strategy to promote young participation in democracy. This might encourage young people to vote and participate in civic life earlier in life.

Education and awareness: The government can fund initiatives that instruct young people on how to participate in local politics, the value of voting, and the democratic process.

Councils for young people: Governments can create councils for young people to give them a direct role in politics. These councils can offer recommendations to elected authorities, offer commentary on programs and policies, and promote youth involvement in neighborhood issues.

Young people are more likely to interact with political problems online and on social media than older individuals.

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Explanation:

Oxygen is carried from the lungs to the tissues via the circulatory system. After we inhale, oxygen enters the lungs and diffuses across the thin walls of the air sacs (alveoli) and into the bloodstream. This process is facilitated by the high concentration gradient of oxygen between the air in the lungs and the blood in the capillaries surrounding the alveoli.

Once the oxygen is in the bloodstream, it binds to hemoglobin molecules in red blood cells, which act as a carrier. Hemoglobin is a protein that has four heme groups, each of which can bind to an oxygen molecule. In the lungs, each hemoglobin molecule can become fully saturated with oxygen (four oxygen molecules bound), giving the blood a bright red color.

The oxygen-rich blood then travels from the lungs to the heart, which pumps it out to the rest of the body via the arteries. As the blood flows through the capillaries in the body's tissues, the oxygen is released from the hemoglobin and diffuses into the cells, where it is used in cellular respiration to produce energy. The waste product, carbon dioxide, is then picked up by the blood and transported back to the lungs to be exhaled.

Answer:Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.

Explanation:

Answer:

Osmosis

Explanation:

Osmosis is the movement of water from a high concentration region to low concentration...

The conservation of energy is explained by the first law of thermodynamics, and the direction of energy flow and the rise in entropy are explained by the second law. We may better comprehend how energy is changed and preserved in our daily lives by comprehending these laws.

1) First law of thermodynamics: Energy transformation and conservation are described by the first two laws of thermodynamics. The first law, sometimes referred to as the law of conservation of energy, holds that energy can only be transported or changed from one form to another and cannot be created or destroyed.

This law can be expressed mathematically as the equation: ΔU = Q - W, Where ΔU denotes the change in internal energy of a system, Q denotes the heat added to the system, and W denotes the work performed on the system.

Example: Take an automobile moving up a hill as an example to demonstrate this law. Fuel is used in the car's engine to create thermal energy, which is subsequently transformed into kinetic energy to propel the vehicle forward. As they slow the car down, the brakes also change kinetic energy into thermal energy. Chemical energy is stored in the car's battery and transformed into electrical energy to run the radio and lights. The sound system in the car then transforms electrical energy into sound energy.

2) The second law of thermodynamics: According to the second rule of thermodynamics, an isolated system's entropy, or disorder, inevitably rises over time. The principle of heat flow, which can be used to express this law, states that heat will always move from hot to cold objects but not the other way around when no effort is being done. Every time energy is transferred or converted, energy is therefore lost as heat, which raises the universe's entropy.

Example: Take the burning of fuel in an automobile engine as an illustration. The majority of the energy from the fuel is wasted as heat as a result of friction and other inefficiencies, though some of it is transformed into kinetic energy to propel the automobile. The subsequent release of this heat energy into the environment adds to the general rise in entropy. The combustion of fossil fuels to produce electricity is another illustration. The majority of the energy is lost as heat, which contributes to global warming and other environmental problems, even though some of it is turned into electrical energy.

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Mendel correctly deduced that children inherit "heritable factors"—one from each parent—for each feature. These elements are now known as genes.

Only one of the two components for each trait is provided to a gamete when it forms (sperm and egg cells).

After fertilization, the two gametes merge, resulting in an offspring with two components (alleles) for each trait.

These "heritable factors" are known as genes today.

The degree to which genetic variations among persons may adequately explain the variations in their attributes is known as heritability. Characteristics like height, eye color, and IQ are examples of traits, as are illnesses like schizophrenia and autism spectrum disorder.

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The sum of the potassium and sodium equilibrium potentials is -30.3 mV, and the concentration ratios of potassium ions inside and outside the cell to sodium ions inside and outside the cell are 0.3027 and 0.9788,.

Within the cell, the potassium concentration is higher than outside, whereas the sodium and chloride ion concentrations are lower. The membrane active transport system, which pumps potassium into the cell and sodium out, is responsible for these variations in sodium and potassium concentrations.

While a normal neuron is at rest, potassium and other anions are concentrated inside the cell, while sodium, chloride, and calcium are concentrated outside. The resting membrane potential is negative as a result of this ion distribution.

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Answer:

its A

Explanation:

i took that quiz and got it wright

A. milder temperament is an improvement Faye would MOST likely try to make in these cows

From seeds to crop protection chemicals including fungicides, herbicides, insecticides, and seed treatments that protect against weeds, disease, and insects, we offer farmers a wide choice of goods

The precise, natural, economic, and social sciences that are pertinent to the study and practice of agriculture are a part of the vast, multidisciplinary field of biology known as "agriscience."

Agriculture science is largely concerned with the production of plants as a source of food for people.

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