the h-zone is where only the thick filament can be found in the sarcomere. select one: a. true b. false

Answer:

One advantage of renewable resources is that it won't run out.

One disadvantage of renewable resources is that it has limited storage capabilities

Option C - all of the choices are functions of the nose - is the correct answer.

The nose performs multiple functions to prepare the air for entry into the respiratory system. These functions include humidifying the incoming air with mucus, warming the incoming air with superficial capillaries, and cleaning the incoming air with nasal hairs, cilia, and mucus. These mechanisms work together to ensure that the air reaching the lungs is filtered, moistened, and at an optimal temperature for efficient respiratory function.

Option C states that all of the choices are functions of the nose, which is correct. The nose acts as a filtration system, capturing particles and pathogens in the mucus and trapping them in the nasal hairs and cilia. It also helps in conditioning the air by adding moisture through the production of mucus and warming it through the superficial capillaries present in the nasal tissues.

Therefore, all of the listed functions (humidifying, warming, and cleaning the incoming air) are essential roles performed by the nose to maintain the health and functionality of the respiratory system.

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Answer:

Undoubtedly, Red Blood Cells are the ones carrying the most oxygen.

Immediately after an action potential passes along an axon, it is not possible to generate a second action potential. Thus, we state that the membrane is briefly refractory

Refractory is a material that is highly resistant to heat, wear, and corrosion. It is commonly used in applications such as lining furnaces, kilns, incinerators, and other high temperature systems. Refractory materials are also used to insulate against extreme temperatures and protect against fire. Refractory materials typically have a high melting point, thermal conductivity, and chemical stability.

This ensures that one action potential is not confused with two, and that an action potential is propagated in a single direction. Myelinated neurons help to increase the speed of action potential propagation, but do not affect the refractory period. Exocytosis and potassium ions are both involved in the generation of action potentials.

Therefore, the correct option is A.
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Natural gas only produces thermal oxides of nitrogen while coal produces both thermal and fuel oxides of nitrogen.

NO is a harmful gas that is produced as a byproduct of combustion and can lead to air pollution and respiratory issues when released into the atmosphere.

The higher the combustion temperature, the greater the amount of NO produced during coal combustion. In contrast, natural gas combustion does not produce as much NO because natural gas is primarily composed of methane and has a higher hydrogen-to-carbon ratio than coal, which results in less carbon dioxide and less NO production.

Natural gas combustion occurs at lower temperatures than coal combustion; hence, it produces less NO as a result. To summarize, the results of the study would be expected to show that natural gas combustion produces less NO than coal combustion, and this is attributed to the differences in the composition of coal and natural gas.

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Q- Epa scientists performed an experiment where coal was burned in different chambers at varying temperatures to see how temperature impacts the amount of NO produced by coal combustion explain how the results of the study would be expected to change if the same experiment were repeated with natural gas.

Answer: genes are linked

Explanation: Gene on a chromosome lies close to another gene controlling a different trait. This indicates that genes are linked, meaning they are physically close to each other on the same chromosome. The proximity of these genes suggests that they are more likely to be inherited together as a unit, rather than independently assorting during the process of genetic recombination.

The projects that will receive funding in arid areas of Africa prone to salinization include:

Salinization is the process whereby the mineral salt content of the soil in an area increases as a result of adverse environmental conditions such as drought.

The projects that will receive funding in arid areas of Africa prone to salinization include:

In conclusion, salinization of soil poses a big threat to crop production in arid regions of Africa.

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The condition that results in thick blood as a result of having too many red blood cells is called polycythemia vera.

Polycythemia is a rare disorder characterized by an abnormally high number of red blood cells in the blood. This can lead to an increased viscosity or thickness of the blood, which can in turn lead to decreased blood flow, increased risk of blood clots, and other complications. Polycythemia can be primary, meaning it is caused by a problem with the bone marrow, or it can be secondary, meaning it is caused by another underlying condition or factor, such as smoking, high altitude, or kidney disease. Symptoms of polycythemia can include headaches, dizziness, blurred vision, fatigue, and itching. Treatment options for polycythemia depend on the underlying cause and may include phlebotomy (removing blood from the body), medication, or other interventions to manage symptoms and prevent complications.

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The corresponding sequence of bases (from left to right) on the other strand of the DNA molecule would be GTCAGC. This is because the two strands of DNA molecules form a double helix structure.

DNA is a double-stranded molecule that consists of two complementary strands, which are held together by hydrogen bonds between the nitrogenous bases. The sequence of bases on one strand of DNA determines the sequence of bases on the other strand because the bases always pair up in a specific way: adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G). In the case of the given sequence, CAGTCG, the complementary sequence on the other strand of DNA can be determined by pairing each base with its complement.

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Answer:

C.

Explanation:

Density of the animal population eliminate.

This can effect the seagrass growth.

Answer:

The energy source is called as geothermal energy.

Explanation:

Heat from within the earth is tapped as source of energy for human use in order to produce electricity as well as heating water.

Human can capture geothermal energy by making Geothermal power plants, which use the heat energy present inside the Earth in order to generate steam which can be used to make electricity.

Geothermal heat pumps that is present near the Earth's surface is used to heat water as well as provide heat for buildings so we can conclude that earth's heat is tapped as a source of energy.

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Answer:

i think its B hope it helps

Explanation:

Adaptations are the alteration that allows the survival of the fittest. The adapted structure of the cacti allows it to take the minerals from the soil and prevents water loss. Thus, options A and B are correct.

Adaptation is seen as the modified physical and chemical characteristics that allow the organism to survive in stressful conditions. A cactus has adapted spines, roots, waxy skin, and deep-layered stomata.

These adaptation has allowed the cactus to survive the harsh conditions of dessert. The wide fibrous roots allow it to draw nutrients and minerals from the soil.

The thick, expandable stem with deep-layered stomata prevents the loss of water from the surface in high-temperature conditions and keeps the plant hydrated.

Therefore, options A and B. the adapted attributes of cacti prevent water loss.

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Answer:

bacteria

Explanation:

'Bt' crops are genetically modified crops that contains a certain gene of a bacteria called Bacillus thuringiensis. The name of this GM or transgenic crop was coined from the bacteria used.

The gene coding for the toxic traits of the bacteria are added into Bt crops e.g cotton, hence, the crops become resistant to pest attack. Therefore, according to this question, BT crops are developed by adding traits from BACTERIA.

HIV viral envelope protein reacts with the CD4 receptor. The correct choice is CD4.

The CD4 (cluster of differentiation 4) glycoprotein is a co-receptor for the T-cell receptor. T helper cells, monocytes, and dendritic cells all have CD4 on their surfaces.

The HIV envelope protein, gp120 ties to the CD4 receptor on the outer layer of the target cell, starting the course of viral passage.

This binding initiates conformational changes in the viral envelope protein, permitting it to interface with a co-receptor. The association between gp120, CD4, and the co-receptor starts the converging of the viral envelope with the target cell surface, permitting the section of the viral hereditary material.

Therefore, the correct choice is the CD4 receptor.

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By the transfer of energy into a container of magnetic marbles the speed changes because of kinetic energy produced by the shaking of container gently. This will lead to phase changes.

All the phase changes in a system are accompanied by the change in the energy of a system. These include transfer of kinetic energy to a system. Changes from a more-ordered state to a less-ordered state are endothermic reactions. Changes from a less-ordered state to a more-ordered state are always exothermic reactions.

A phase change in a system takes place when a matter changes from one state to another state. These changes occur when sufficient amount of energy is supplied to the system or lost from the system. Phase changes also occur when the pressure on the system is changed.

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Answer:

subject

Biology, 21.10.2020 16:01 jazz589729

Information about the four organisms can be found on the Internet. Use credible websites to find answers to the questions you developed in part A. Based on this data, draw your own dichotomous key. Based on the key you created, do you think some of the organisms are more closely related than others? Explain your answer.

Part 1 was this:A dichotomous key works on the principle of asking yes-or-no questions about the organism. To identify it, the answers for that organism are then compared to existing organisms to identify it. Prepare a list of four to five questions about each of the organisms listed below to help you create your own key. For each question, make sure the answer isn’t the same for all four organisms. For example, Does the organism have cells? would be an inappropriate question, because all the organisms have cells.

brewer’s yeast (Saccharomyces cerevisiae)

E. coli bacteria (Escherichia coli)

green hydra (Hydra viridissima)

house cat (Felis catus)

Here were my answers:Brewer’s yeast

Is it a unicellular organism? Yes

Is it found inside the human body? Yes

Is it visible without a microscope? Yes

Can it produce its own food? No

E. coli bacteria

Is it a unicellular organism? Yes

Is it found inside the human body? Yes

Is it visible without a microscope? No

Can it produce its own food? No

Green hydra (Hydra viridissima)

Is it a unicellular organism? No

Is it found inside the human body? No

Is it visible without a microscope? Yes

Can it produce its own food? Yes

House cat (Felis catus)

Is it a unicellular organism? No

Is it found inside the human body? No

Is it visible without a microscope? Yes

Can it produce its own food? No

Explanation:

Assuming the maximum pressure difference his lungs can manage and still breathe is -82 mmHg, the maximum depth the diver could have been is 1.1 m below the surface.

The pressure difference is caused by the depth of water.
Using the formula,

∆P = ρg*h

Where ∆P is the pressure difference, ρ is the density of the fluid (in this case, water), g is the acceleration due to gravity, and h is the depth.

Rearranging the equation to solve for h:
h = ∆P/ρg

Plugging in the values:

∆P = -82 mmHg = -82 mmHg = -10,906 N/m²

h = ( -10,906 N/m²)/(1000 kg/m³)(9.8 m/s²)
h = -1.1 m

Therefore, the maximum depth the diver could have been is 1.1 meters below the surface.

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Answer:

renewable resources. natural resources that can be replenished or replaced by natural processes at a rate comparable or faster than their rate of consumption.

Explanation:

Fossil fuel is an exhaustible natural resource because fossil fuel requires millions of years to frame from the dead vegetation and animals that get buried deep inside the earth.

It requires high temperatures and pressure for the formation of resources that can't be provided in the laboratory or any other place.

It is a conventional source of energy. and it takes millions of years to make

their energy comes from the energy produced by the plant and animals.

In, other words, they are the remains of decomposed of plants and animals

Examples of fossil fuels are crude oil and coal.

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The ames test is a bacterial mutation assay used to determine the potential mutagenic properties of a chemical.

In this case, the fact that 150 colonies grew on plate 2 (with the test chemical) but no growth was observed on plate 1 (without the test chemical) suggests that the chemical may have caused mutations in the bacteria, leading to increased growth. This suggests that the chemical has potential mutagenic properties and may pose a risk to human health if it is present in plastic packaging materials. Further tests would be needed to confirm these findings and determine the specific type of mutations caused by the chemical.

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One example of a point mutation that can have an effect not included in the options given is a frameshift mutation.

A frameshift mutation occurs when a nucleotide is either inserted or deleted from the DNA sequence, causing a shift in the reading frame during translation. This alteration disrupts the correct grouping of codons, resulting in a completely different amino acid sequence downstream from the mutation site.

For instance, let's consider a deletion of a single nucleotide in the DNA sequence. This deletion shifts the reading frame, causing all subsequent codons to be misread. As a result, the translation process produces a completely different protein with altered amino acid sequence. This can lead to a non-functional or severely impaired protein, affecting its structure, stability, and function. The consequences of frameshift mutations can be dramatic, often resulting in loss of protein function and potentially causing genetic disorders.

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Answer:

Regardless of how the steps are documented, the goal of scientific method is to gather data that will validate or invalidate a cause and effect relationship.

Explanation:

Answer:

adenine, guanine, cytosine, and thymine are the 4 bases of dna

Explanation:

they are the "rungs" of the DNA ladder. Adenine only pairs with thymine nd guanine only pairs with cytosine.

The large storage container for water, food, and waste only in plant cells is called a vacuole.

The vacuole is a membrane-bound organelle that takes up a significant portion of the plant cell's volume and is responsible for regulating the cell's osmotic pressure and storing nutrients and waste products.

Plant cells contain a large central vacuole, which is a membrane-bound organelle that serves as a storage container for water, nutrients, and waste products. The vacuole plays a crucial role in maintaining turgor pressure, which is the pressure exerted by the vacuole against the cell wall that helps to keep the plant upright.

In addition to storing water and nutrients, the vacuole in plant cells can also contain pigments, such as anthocyanins, which give plants their vibrant colors. The vacuole can also serve as a storage site for toxic compounds, such as alkaloids, which can help to protect the plant from herbivores and other predators.

While animal cells also contain vacuoles, they are generally much smaller and less prominent than those found in plant cells. In animal cells, vacuoles are typically involved in processes such as exocytosis, endocytosis, and the storage of materials such as ions and neurotransmitters.

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Hypersecretion, intestinal hormones, disorder - E34.8.

To code a disorder of the hypersecretion of intestinal hormones, the coder should reference the term "Hypersecretion" in the alphabetic index of the International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM). The appropriate code for this condition would be E34.8.

E34.8 is the ICD-10-CM code for other specified endocrine disorders. Within this category, "hypersecretion" would be classified as an endocrine disorder. The term "intestinal hormones" would fall under the broader category of endocrine disorders, as it involves the excessive secretion of hormones related to the gastrointestinal system.

By referencing the term "Hypersecretion" in the alphabetic index, the coder would be directed to the appropriate code, E34.8, which can be used to accurately document and classify the disorder of hypersecretion of intestinal hormones.

It is important for medical coders to accurately identify and assign the appropriate codes based on the documented diagnosis to ensure accurate billing, tracking of diseases, and statistical reporting.

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Answer:

Explanation:

Wow that's hard

Answer:

e er

Explanation:

Elodea exposure time is a constant that is unaffected by the distance from the light source, the rate of photosynthesis, or the dependent variable.

The duration the elodea is exposed to the light is a constant and is independent of the elodea's proximity to the light source, the rate of photosynthesis, and the dependent variable.

the cause is the independent variable. The other factors in your study have no bearing on its value. The outcome is the dependent variable. Changes in the independent variable affect how much it is worth.

How many bubbles emerged while the light source was on was the dependent variable, which represented the rate of photosynthesis. Depending on the amount of light, photosynthesis will change.

Light intensity is a standalone variable (how close the light is). The number of oxygen bubbles released is the dependent variable (the rate of photosynthesis).

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Answer:

The content you provided mentions Quizlet and refers to specific cells of the endoderm that are specified by high levels of Wnt and BMP. It seems like you are looking for an explanation of this information.

Explanation:

The endoderm is one of the three primary germ layers that form during early embryonic development. It gives rise to various internal organs and structures, such as the gastrointestinal tract, liver, and lungs. The specification of different cell types within the endoderm is regulated by signaling molecules, including Wnt and BMP.

Wnt and BMP are two important signaling pathways involved in embryonic development. They play key roles in determining cell fate and directing cellular differentiation. In the context of the endoderm, high levels of Wnt and BMP signaling can influence the specification of specific cell types.

While the specific cell types mentioned in the content are not specified, it suggests that certain cells within the endoderm are specified by the highest levels of Wnt and BMP signaling. These signaling pathways likely contribute to the development and differentiation of those particular cell types.

It's worth noting that the exact cell types specified by Wnt and BMP signaling can vary depending on the specific context and developmental stage. Further information would be needed to provide a more precise answer regarding which cells of the endoderm are specified by the highest levels of Wnt and BMP in the Quizlet content you mentioned.

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Answer: Transcription is the process in which a gene's DNA sequence is copied (transcribed) to make an RNA molecule. ... RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.

Explanation:

Once transcription is completed, the newly synthesized RNA molecule called messenger RNA (mRNA), undergoes further processing and then moves on to the next step in gene expression, which is translation.

In eukaryotic cells, the mRNA molecule undergoes several modifications before it is ready to be translated into protein. These modifications include the addition of a protective cap structure at the 5' end of the mRNA, the addition of a poly-A tail at the 3' end, and the removal of non-coding regions called introns through a process called splicing. These modifications are important for the stability, transport, and efficient translation of the mRNA.

Once the mRNA is fully processed, it is transported out of the nucleus and into the cytoplasm, where it encounters ribosomes. Ribosomes are cellular structures that facilitate the process of translation.

During translation, the mRNA is read by ribosomes, and the sequence of nucleotides in the mRNA is translated into a specific sequence of amino acids, forming a protein. This process occurs in the cytoplasm and is mediated by transfer RNA (tRNA) molecules that bring the appropriate amino acids to the ribosome based on the codons present in the mRNA.

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