Which neurotransmitter stimulates skeletal muscle cells to contract.

Answer:

receptores olfativos especializados localizados en el epitelio olfatorio de la mucosa nasal

Explanation:

Las neuronas receptoras del olor se denominan receptores olfatorios. Los receptores olfatorios son células especializadas capaces de percibir miles de sustancias químicas diferentes y decodificar la información en miles de olores distintos. Estos receptores se localizan en la mucosa nasal de las fosas nasales. En el caso del olor a rosa, como así también cualquier otro olor, las sustancias químicas responsables del olor se dirigen al epitelio olfatorio de la mucosa nasal, donde se unen a receptores específicos localizados sobre filamentos sensoriales (cilios) en las membranas celulares de las neuronas especializadas. La unión desencadena una respuesta en la células neuronales, es decir, una descarga eléctrica que se propaga desde las fosas nasales hasta el cerebro, el cual decodifica la información (el olor) en una región conocida como bulbo olfatorio.

Answer:

See the answer below

Explanation:

Both water and glucose contain hydrogen and oxygen. However, glucose has carbon in addition to the two elements. A molecule of glucose has 6 carbon, 12 hydrogen, and 6 oxygen atoms while a molecule of water has just 2 atoms of hydrogen and one atom of oxygen.

Both glucose and water are polar molecules.

Water is liquid at room temperature while glucose is a solid at room temperature.

In terms of structures, the overall structure of water is bent while that of glucose may be alpha or beta 6 carbon ring structure.

The size of populations can vary, from a small number of people in a short location to a vast population dispersed across several continents.

A population is a collection of members of the same species who can interbreed, reside in the same region, and belong to the same species. Birth, mortality, immigration, and emigration rates, among other things, all affect population size.

a. As every individual in the first generation was heterozygous dominant, all of the offspring were homozygous for the dominant trait. The heterozygous dominant individuals were crossed in the second generation, resulting in a 3:1 ratio of dominant to recessive features. When the heterozygous individuals were crossed once more in the third generation, the ratio of dominant to recessive features was 9:7. The segregation of alleles during meiosis and random chance are most likely to blame for the rise in the proportion of people carrying the recessive characteristic.

b. No, Hardy-Weinberg equilibrium is not present in this population. Five requirements must be met for Hardy-Weinberg equilibrium: there must be no mutation, random mating, no gene flow, an unlimited population size, and no selection.

The statistics in this population reveal that allele frequency changes with time, indicating that the population is not in equilibrium. The scientists purposefully bred homozygous individuals, so the population size is limited and mating is not entirely random. The population is not in Hardy-Weinberg equilibrium as a result.

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The structure is part of both the lower respiratory tract and the conducting system is Bronchus. The correct option is b.

The bronchus is a part of both the lower respiratory tract and the conducting system. It is a large airway that branches off from the trachea and further divides into smaller bronchioles, which eventually lead to the alveoli.

The lower respiratory tract consists of the structures involved in gas exchange, including the bronchi, bronchioles, and alveoli. These structures allow for the exchange of oxygen and carbon dioxide between the lungs and the bloodstream.

The conducting system, on the other hand, refers to the airways that are responsible for transporting air to and from the lungs. This includes the trachea, bronchi, and their smaller branches. The bronchus is a specific part of the conducting system that branches off from the trachea and continues to divide into smaller bronchioles.

The pharynx (a) is part of the upper respiratory tract and serves as a common pathway for both air and food. The alveoli (c) are tiny air sacs located at the end of the bronchioles, where gas exchange occurs. The larynx (d) is also part of the upper respiratory tract and plays a crucial role in vocalization and protecting the airway.

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Answer:

The knowledge of simple biological reactions tells us that the product of reactions results from the complete or partial use of the reactants. In some reversible reactions, products can be converted to reactants in equal volume. Hence, in reactions that cannot be reversed, as evident in respiration, its waste products can be used to indicate that indeed respiration did take place. When glucose is consumed it is broken down through a series of reactions to give carbon dioxide and water as waste products.

Explanation:

Answer:

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Explanation:

The next decades are crucially important to putting the world on a path of reduced greenhouse gas emissions.

By the end of the century, demand for energy will have tripled under the combined pressure of population growth, increased urbanization and expanding access to electricity in developing countries. The fossil fuels that shaped 19th and 20th century civilization can only be relied on at the cost of greenhouse gases and pollution.

A new large-scale, sustainable and carbon-free form of energy is urgently needed. The following advantages make fusion worth pursuing.

Abundant energy: Fusing atoms together in a controlled way releases nearly four million times more energy than a chemical reaction such as the burning of coal, oil or gas and four times as much as nuclear fission reactions (at equal mass). Fusion has the potential to provide the kind of baseload energy needed to provide electricity to our cities and our industries.

Sustainability: Fusion fuels are widely available and nearly inexhaustible. Deuterium can be distilled from all forms of water, while tritium will be produced during the fusion reaction as fusion neutrons interact with lithium. (Terrestrial reserves of lithium would permit the operation of fusion power plants for more than 1,000 years, while sea-based reserves of lithium would fulfil needs for millions of years.)

No CO₂: Fusion doesn't emit harmful toxins like carbon dioxide or other greenhouse gases into the atmosphere. Its major by-product is helium: an inert, non-toxic gas.

No long-lived radioactive waste: Nuclear fusion reactors produce no high activity, long-lived nuclear waste. The activation of components in a fusion reactor is low enough for the materials to be recycled or reused within 100 years.

Limited risk of proliferation: Fusion doesn't employ fissile materials like uranium and plutonium. (Radioactive tritium is neither a fissile nor a fissionable material.) There are no enriched materials in a fusion reactor like ITER that could be exploited to make nuclear weapons.

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Excess nitrogen added into the nitrogen cycle by human-produced fertilizers causes eventual oxygen depletion in nearby water systems. So, option e is correct.

The nitrogen cycle is a natural process in which nitrogen is converted into various forms in the environment. Human activities, such as the application of fertilizers, can introduce excessive amounts of nitrogen into the soil and surrounding ecosystems.

When excessive amounts of nitrogen from fertilizers enter nearby water systems, they can promote the rapid growth of algae, known as algal blooms. This excessive growth of algae leads to the depletion of oxygen in the water as the algae die and decompose. The decomposition process consumes oxygen, resulting in lower dissolved oxygen levels in the water. This oxygen depletion can have severe consequences for aquatic life, as it can lead to the death of fish and other organisms that require oxygen to survive.

In summary, the excess nitrogen introduced by human-produced fertilizers can disrupt the natural nitrogen cycle, leading to oxygen depletion in nearby water systems, which negatively impacts aquatic life.

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Coprolites, or fossilized dinosaur feces, can reveal information on the dinosaurs' food, paleoclimate, and paleo ecosystem, hence option D is correct.

Researchers can tell what the dinosaur ate by analyzing the coprolite's makeup, which includes plants and other creatures. They may also discover undigested bones, which can reveal the amount and kind of prey ingested by the dinosaur.

Coprolites, in addition to giving information about the dinosaur's nutrition, can also provide information about the paleoclimate and paleo ecosystem. Similarly, the presence of certain bacteria or parasites inside the coprolite might indicate the existence of specific animals in the region.

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The selection that acts over evolutionary time to preserve traits that increase an individual's ability to mate is known as se_xual selection.

The expression 'se_xual selection' makes reference to the type of evolutionary constraint on the individual's ability to mate.

Se_xual selection is fundamental to increase the genetic variation and thus enhance adaptive chances.

Se_xual selection can be considered a special type of natural selection that acts at an individual level.

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The letter "e" is often used to indicate the process of transcription in gene expression. Transcription is the process by which the genetic information encoded in DNA is copied into RNA. This process is initiated by the binding of RNA polymerase to a specific region of DNA called the promoter.

The RNA polymerase then unwinds the DNA helix and synthesizes a complementary RNA strand using one of the DNA strands as a template. Transcription is a crucial step in gene expression because it allows the information encoded in the DNA to be transferred to RNA, which can then be used to synthesize proteins or other functional molecules.

The RNA molecule can be further processed, including modifications like splicing, before it is translated into protein by the ribosome.  Overall, gene expression involves a complex series of molecular processes that allow the genetic information encoded in DNA to be used to produce functional molecules and determine the phenotype of an organism.

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Answer: Every microbiologist eventually has to grow bacteria in the lab. Bacterial culturing is the process of growing bacteria.The media must contain everything the bacteria need to survive and can be liquid or solid. Agar is added to hot liquid media to make a gel used for culturing in plates, tubes, slants, and stabs.

Explanation:

Every microbiologist has to grow bacteria in the lab.  Agar is added to hot liquid media to make a gel used for culturing in plates, tubes, slants, and stabs.

Agar is a jelly-like substance consisting of polysaccharides obtained from the cell walls of some species of red algae, primarily from ogonori and "tengusa".

Agar (agar agar) is a gelatinous substance that is extracted from seaweed and processed into flakes, powders and sheets. It is commonly used in Asian cuisines and as a flavorless vegan substitute for gelatin.

Agar helps gel, stabilize, texturize and thicken beverages, baked goods, confectioneries, dairy products, dressings, meat products and sauces.

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Answer:

Mitosis consists of one stage whereas meiosis consists of two stages. Mitosis produces diploid cells (46 chromosomes) whereas meiosis produces haploid cells (23 chromosomes). Mitosis produces two identical daughter cells whereas meiosis produces four genetically different daughter cells

Answer:

Mitosis consists of one stage whereas meiosis consists of two stages. Mitosis produces diploid cells (46 chromosomes) whereas meiosis produces haploid cells (23 chromosomes). Mitosis produces two identical daughter cells whereas meiosis produces four genetically different daughter cells

Explanation:

Answer:

A five-carbon sugar (2'-deoxyribose in DNA or ribose in RNA)

A phosphate molecule

A nitrogenous (nitrogen-containing) base

Explanation:

Answer:

The 3 different parts of a nucleotide are a nitrogenous base, a pentose sugar, and a phosphate.

Explanation:

Answer:

I think Indirect contact with animal feces

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If your cell did not produce proteins enzymes would not be available to speed up reactions throughout your body, and they would also not be available to make the many organelles made with proteins such as microtubules which would cause many other problems within the cell.

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Answer:

thanks

Explanation:

c

The answer happens to be B.

Based on the concept of natural selection, the difference in fur color of the rabbits is due natural selection which selects rabbits that are better suited for survival in their environment.

Natural selection is the process by which organisms or individual species of an organism whonare better suited or adapted to an environment are naturally select to survive and reproduce in that environment.

Natural selection is one of the basis of evolution.

Given a species of rabbits having white fur and brown fur.

White rabbits are better suited to survive in the winter seasons and snowy environment than brown fur rabbits.

This is because their white fur matches with the white of snow, hence serving as a camouflage against predators.

Brown rabbits on the other hand, are better suited for other seasons and dry desert environment than brown rabbits where their fur matches the rocks, tree bark, and dirt.

This serves as a camouflage and provides cover from predators.

Therefore, the difference in fur color of the rabbits is due natural selection which selects rabbits that are better suited for survival in their environment.

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Answer:

False I believe

Explanation:

Hypotheses are suggestions, based on the thoughts of the famous scientists wild with the guesses

A hypothesis is a proposed explanation for the phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method was requires that one that can test it. the Scientists are generally the base of scientific hypotheses on they previous observations that cannot be satisfactorily be explained with the available the scientific theories A hypothesis is an the assumption, an idea that is being proposed for the sake of the argument so that it can be tested as to see if it might be true. In the scientific method, the hypothesis was constructed before any of the applicable research has been done, apart from the basic to background review.

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Chicken spends about 50% of the daylight hours foraging but also feeds, rests, preens and dustbathes. Type of chicken most likely you own is : Jungle fowl.

Wild Junglefowl and feral chickens spend almost half of their time foraging and the rest resting, preening and dust-bathing

Foraging behaviors are pecking and scratching at potential food sources, as well as looking for and sampling possible food sources. Wild chickens  forage on grasses, weeds and insects. Most chickens live on farms or as domestic pets but there are some chickens that live in the wild. Jungle fowl or feral chickens,  rely on their senses and predatory instincts to survive.

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Even if all the cells have the same DNA they biochemical function are different, that's because differents sets of genes must be turned on and off in each cell type by the action of enzymes and other molecules. Each cell have the same 20,000 or so genes but they are biochemically selected by the action of molecules as hormones and chemical signaling. Therefore, different cells use different parts of the DNA code as directions.

Answer:

c

e lExplanation: it can increase co2 in the air because the less the trees the more the co2 in the air

Hemidesmosomes are similar to focal adhesions in that both interact with extracellular matrix proteins. The correct answer is both interact with extracellular matrix proteins.

Hemidesmosomes and focal adhesions are both cell adhesion structures that play important roles in cell-extracellular matrix interactions. While there are some similarities between the two, it is important to note that not all of the choices provided are correct.

Hemidesmosomes are specialized junctional complexes found in epithelial cells, particularly in tissues subjected to mechanical stress. They anchor epithelial cells to the underlying basement membrane by connecting the intermediate filaments inside the cell to the extracellular matrix proteins outside the cell. This interaction with extracellular matrix proteins provides structural stability to the epithelial tissue.

Focal adhesions, on the other hand, are multi-protein complexes found in various cell types. They also mediate cell adhesion to the extracellular matrix, allowing cells to adhere, migrate, and sense their mechanical environment. Focal adhesions involve integrins as transmembrane linker proteins, which connect the extracellular matrix to the actin cytoskeleton inside the cell. The actin filaments provide structural support and enable cellular movement and signaling.

Therefore, the correct similarity between hemidesmosomes and focal adhesions is that both interact with extracellular matrix proteins.

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Answer:

when I sat on my foot it felt super numb when I step on to the floor it is like electric shocking Legos

Answer:

When I was sitting on my couch, I sat on my leg for a long period of time.  When I got up, my leg felt ticklish and pri ckly because I was sitting on it for a long time, which put's too much pressure on the nerves.

I think its Bb, bb because if julie has blonde hair then it's most likely to be Bb, bb

If Julie has blonde hair, the genotypes of their parents could have been found to be Bb and bb. Thus, the correct option for this question is A.

Genotypes may be defined as the ultimate combination of alleles of those genes which are selected for specific studies in order to express some genetic characteristics.

According to the context of this question, if the trait of Blonde hair is recessive in nature. This means that both the alleles of this gene are recessive, i.e. bb.

Now, if Julie has blonde hair, which means both alleles are recessive. So, the genotypes of parents of Julie are either homozygous recessive or heterozygous in nature. This characteristic is well determined by option 1.

Therefore, if Julie has blonde hair, the genotypes of their parents could have been found to be Bb and bb. Thus, the correct option for this question is A.

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Answer:

i think is D iam not sure

Explanation:

True, sister chromatids carry copies of the same genes.

Sister chromatids are identical copies of a single chromosome that are formed during the process of DNA replication in the S phase of the cell cycle. Each chromosome consists of two sister chromatids that are held together at a region called the centromere. These sister chromatids contain identical genetic information because they are formed through the replication of the original DNA molecule.

During DNA replication, the double-stranded DNA molecule unwinds, and each strand serves as a template for the synthesis of a new complementary strand. As a result, two identical DNA molecules, known as sister chromatids, are produced. These sister chromatids remain attached to each other until they separate during cell division.

When a cell undergoes mitosis or meiosis, the sister chromatids separate and are distributed to daughter cells. Each daughter cell receives one of the sister chromatids, which then becomes an individual chromosome.

Therefore, each daughter cell inherits a complete set of genes from the parent cell, as the sister chromatids carry copies of the same genes. This ensures the accurate transmission of genetic information from one generation to the next.

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Molecules start moving faster as the kinetic energy of the molecules becomes fast when the temperature increases. That's why, the rate of an enzyme-controlled reaction will change with the temperature.

An enzyme is a catalyst in biology, and its work is to lower the activation energy and increase the rate of reaction. But in this whole process, the enzyme itself is not being used up.

Whenever the temperature changes from high to low or low to high, the kinetic energy of the molecules in a reaction also changes.

Here, the temperature increases from 35°C to 55°C, there will be more kinetic energy.

So, if the kinetic energy is more, there would be more collision between molecules which thus results in more complex substrates formed.

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Answer:Molecules start moving faster as the kinetic energy of the molecules becomes fast when the temperature increases. That's why, the rate of an enzyme-controlled reaction will change with the temperature.

An enzyme is a catalyst in biology, and its work is to lower the activation energy and increase the rate of reaction. But in this whole process, the enzyme itself is not being used up.

Whenever the temperature changes from high to low or low to high, the kinetic energy of the molecules in a reaction also changes.

Here, the temperature increases from 35°C to 55°C, there will be more kinetic energy.

So, if the kinetic energy is more, there would be more collision between molecules which thus results in more complex substrates formed.

Explanation:

Answer:

The somatic nervous system (SNS) deals with sensory input and voluntary motor (efferent) activities, while the autonomic nervous system (ANS) deals only with efferent (motor) signals from the CNS to control activities in the body that are distinct from those under conscious voluntary control.

Explanation: