The right response is: A.
Natural selection will favour this characteristic since shorter plants are better fitted to survive (the taller ones are devoured by birds).
The greatest flowers and plants for luring songbirds should include nesting materials as well as edible seeds or fruit. The best choice is to choose hardy perennials that are native to your area and should do well in most gardens.
Heliotropic indicates that sunflowers turn their flowers to face east as the Sun moves across the sky.Thus, now we know that birds prefer tall plants to eat first as compared to the short plants.
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In any field of sunflowers, the height of the plants vary. Birds first eat the seeds from the tallest plants. If this eating pattern continues season after season, what would we expect to happen to sunflowers over time?
A. Get shorter
B. Become extinct
C. Reproduce asexually
D. Stop producing seeds
describe how increasing salinity affects the amount of fluid ejected each time a contractile vacuole contracts
Increasing salinity each time a contractile vacuole contracts may also increase the amount of fluid ejected.
Contractile vacuoles are organelles found in certain aquatic organisms, such as single-celled protists, that pump excess water out of the cell in order to maintain osmotic balance.
As the salinity of the environment increases, the concentration of dissolved ions and other solutes in the water also increases. As a result, the concentration of solutes inside the cell becomes relatively lower compared to the outside environment. This causes water to flow into the cell through osmosis, leading to an increase in the cell's volume.
To counteract this influx of water, the contractile vacuole will contract more frequently and with greater force in order to pump out the excess water. This increase in frequency and force of contractions will increase the amount of fluid ejected each time the contractile vacuole contracts.
In summary, increasing salinity leads to an increase in the osmotic pressure and water influx into the cell. As a result, the contractile vacuole contracts more frequently and forcefully to pump out the excess water, which increases the amount of fluid ejected each time the contractile vacuole contracts.
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how do current changes in the atmosphere (human-made or natural) affect other systems?
The current changes in the atmosphere affects the survival of aquatic organisms negatively.
What are changes in the atmosphere?Changes in atmosphere has to do with the introduction of substances and components, in excess, that distorts the normal balance of natural elements found in the atmosphere.
This can be in the form of air pollution or water pollution or land pollution which could be initiated naturally or by the activities of man.
The release of harmful gases from factory or industries such as Carbon Monoxide, Lead, Nitrogen Oxides, Ozone, Particulate Matter, Sulfur Dioxide and other air pollutants can lead to increase in earth's temperature.
This affects the amount of oxygen available to both humans and the aquatic organisms leading to decrease in their survival rate.
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what does the sympathetic nervous system control? responses the mind-body connection the mind-body connection the secretion of dopamine the secretion of dopamine the fight-or-flight response the fight-or-flight response the release of endorphins
The sympathetic nervous system control the fight-or-flight response
What is sympathetic nervous system ?The sympathetic nervous system gets the body ready for the "fight or flight" reaction in the event of a threat. The parasympathetic nervous system, on the other hand, prevents the body from overworking and returns it to a condition of calm and composure.
The pituitary and adrenal glands are stimulated by these hormones as a result of the sympathetic nervous system. Adrenaline, noradrenaline, and cortisol are among the catecholamines that are released as a result. This series of events causes an increase in respiration, blood pressure, and heart rate.
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which of the essential nutrients is/are grouped into different types of sugars? proteins water vitamins and minerals carbohydrates fats
Answer:
Carbohydrates.
Explanation:
Carbohydrates are essential to the body. They are sugars or starches that provide energy for all the cells and tissues in the body. There are two different types of carbohydrates: simple and complex.
phospho fructo kinase is a key enzyme in the glycolisys pathway. a kinase is an enzyme that:
Lowers the activation energy for a spontaneous reaction to begin
Removes a phosphate group from a molecule
Transfers a phosphate group from ATP to another molecule
Phosphofructokinase is a key enzyme in the glycolysis pathway. Therefore a kinase is an enzyme that transfers a phosphate group from ATP to another molecule which is denoted as option C.
What is an Enzyme?
This is referred to as biological catalysts that is responsible for accelerating chemical reactions in the body system.An example of an enzyme is protease which is responsible for catalyzing the digestion of protein substances during digestion.
Phosphofructokinase is a kinase enzyme that phosphorylates fructose 6-phosphate in glycolysis and we should also note that this is done by the transfer of a phosphate group from ATP which is an example of a high-energy, phosphate-donating molecules to specific substrates and this process is known as phosphorylation.
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although both dominance and epistasis involve masking of gene expression, they are different from each other. what is the major difference?
Dominance occurs when one allele masks another at the same location, but epistasis occurs when one locus masks another.
The condition is called as "epistasis," and it occurs when the expression of one or more other genes changes (e.g., masks, inhibits, or suppresses) the expression of a certain gene. The pigmentation of mice is an example of epistasis.
The dominant allele of one gene masks the expression of all alleles of another gene in dominant epistasis, whereas recessive epistasis masks the expression of all alleles of another gene. This is the primary distinction between dominant and recessive epistasis.
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You are carrying a lunch tray when you bump into the edge of a table. Although the tray did not tip, your milk falls off of the front of the tray. What law of motion is shown in this situation?
a. law of inertia
b. law of acceleration
c. law of interaction
You run against a table's edge while carrying a lunch tray. Despite the tray not falling, your milk spills off the front. The law of motion shown in this situation is the law of inertia and option a is correct.
Newton's first law of motion/inertia states that without the introduction of an unbalanced force, an object will remain stationary or continue traveling straight ahead at a constant speed.
In the given situation, the law of inertia is applicable. Here, the milk may fall or stay based on the movement of the container holding the milk. The milk will spill when the container is moved. So here, bumping into the table cause the container holding the milk to move. As a result, the milk spills.
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Which of the following is NOT a renewable resources? (A) wind (B) sunlight (C) water (D) fossil fuels (E) trees
The correct answer is D. fossil fuels. Fossil fuels are non-renewable resources, as they are finite and will eventually run out. Wind, sunlight, and water are all renewable resources, as they can be replenished naturally. Trees are also renewable, as they can be replanted and harvested over and over again.
Fossil fuels are non-renewable energy sources that are formed over millions of years from the remains of plants and animals. Common fossil fuels are coal, oil, and natural gas. These fuels are used to generate electricity, power vehicles, and heat homes and businesses.
While fossil fuels are a convenient and relatively inexpensive source of energy, they are not without their drawbacks. Fossil fuels release pollutants into the air when burned, leading to air pollution, acid rain, and climate change.
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What is the cause of biodiversity?
Unlike viruses and bacteria, neurotoxins:
Neurotoxins are not infectious, in contrast to viruses and bacteria. Several procedures are used to create vaccines.
Inactivated or destroyed organisms or viruses, inactivated toxins (for bacterial infections where toxins produced by the bacteria, and not the bacteria themselves, cause illness), live viruses that have been attenuated or killed, or only portions of the pathogen may be present (this includes both subunit and conjugate vaccines). The current Childhood Immunization Schedule recommends live, attenuated vaccines against influenza, varicella (chickenpox), and measles, mumps, and rubella (through the combination MMR vaccine) (in the nasal spray version of the seasonal flu vaccine).
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if a purebred brown hamster mates with a purebred white hamster, and all the offspring in the f1 generation are brown, which statement is true of the brown and white traits?
Answer:
If a purebred brown hamster mates with a purebred white hamster, and all the offspring in the F1 generation are brown, then the brown trait is dominant and the white trait is recessive. This means that the brown trait is expressed in the F1 generation, while the white trait is not expressed. However, the white trait is still present in the genes of the F1 generation and can be passed down to the next generation.
does passive transport move with the concentration gradient?
Yes, passive transport move with the concentration gradient.
The molecules travel against the concentration gradient in active transport, while they travel in the concentration gradient's direction in passive transport.
Passive membrane transfer is one of the most direct types. The movement is accomplished through passive transport, a naturally occurring phenomena that doesn't require the cell to expend any energy.
Substances travel by passive transfer from a high concentration area to a low concentration area. A concentration gradient is a pattern of different levels of one chemical present in physical space.
Small molecular weight compounds are transported across membranes passively by diffusion and osmosis. Areas of high concentration of substances permeate into areas of low concentration.
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Give an example of how an animal could respond to the environment and change how it interacts with other animals. chapter 16 revcuew
Animals may engage in behaviors including hibernation, migration, defense, and courting in response to environmental cues. Some animals will hibernate as a response of the cold, winter weather (stimulus).
Hibernation, which is employed to conserve the body's food reserves, is a state of considerably reduced bodily activity. There are only three ways for animals to respond to climate change: they can move, adapt, or perish. In an effort to avoid the warming temperatures, many animals are travelling to higher altitudes and latitudes, but most species may not be able to outrun the changing environment in time. There are four primary types of two-way interactions between species in ecological webs: mutuality, commercialism, and competition.
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based on the information above, which ecosystem most likely experienced a recent population bottleneck? responses ecosystem a, because its low genetic diversity could have resulted from an event that reduced the variation in the gene pool. ecosystem a, because its low genetic diversity could have resulted from an event that reduced the variation in the gene pool. ecosystem b, because its high species diversity could have resulted from increased competition among its members. ecosystem b, because its high species diversity could have resulted from increased competition among its members. ecosystem c, because its low habitat diversity indicates an increase in available niches.
Answer: Ecosystem A, because its low genetic diversity could have resulted from an event that reduced the variation in the gene pool.
Please answer my question quickly
Answer: rr
Explanation: Because when the first line is crossed with R and r, the result is Rr and rr respectively.
and on the second line the same happens
In this assignment, you and your partners will design a plan for how a city can use a piece of land. You will begin by conducting Internet research on soil erosion. The information you collect should be recorded in the table provided on your Student Guide Worksheet. Then, you will read about a fictional city and how it would like to develop a piece of land. The city wants to use the land wisely so they can maintain the soil and increase biodiversity. Your background research on soil erosion will help you learn why soils are valuable, what human activities increase soil erosion, and what things can be done to sustain soils. With your partners, you will brainstorm a list of possible ways the city can develop this land. You will then evaluate each way based on how it will affect the environment, how much money is needed to develop the land and how the developed land will benefit the citizens of the city. Finally, you will create a presentation summarizing your ideas and present your design plan to the class.
The term "soil erosion" refers to the eroding of the topsoil, the fertile soil that is essential to life.
Numerous variables, such as the composition of the soil, the presence of plants, and the severity of wind and rain, affect the pace of soil erosion. We have the ability to address one of the biggest environmental problems facing the planet since our own actions can also affect how quickly soil erosion occurs.
Soil erosion is caused by human activity, mainly farming and clearing land. Overgrazing by livestock like sheep and cattle can also strip enormous tracts of land of the ground-covering vegetation that would otherwise keep the soil in place. Deforestation is another technique that has terrible effects on the health of the soil.
The amount and quality of soil ecosystems and arable land are both decreased by soil erosion (land that can be used to grow crops). According to scientists, half of all topsoil loss in the Midwest, which contains some of the most productive agriculture in the country, has taken place in the previous 50 years as a result of erosion that has been exacerbated by human activities.
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Answer:
Explanation:
What are some of the effects of soil loss? Fatal Effects of Soil Degradation
1. Land degradation Soil quality decline is one of the main causes of land degradation and is considered to be responsible for 84% of the ever-diminishing acreage. ...
2. Drought and aridity Drought and aridity are problems highly influenced and amplified by soil degradation. ...
3. Loss of arable land ...
4. Increased flooding ...
5. Pollution and clogging of waterways
What can be done to prevent soil erosion?
1.Use Soil-friendly Agricultural Practices Terraced farming needs to be implemented to make …
2.Offer Incentives for Land Management Although the science of sustainable land …
3.Prevention AND Rehabilitation
Brainstorm possible uses for the land.
1. Tiny Houses
2. Community Garden
3. Wildlife Preservation
4. Farming
5. Recreation
6. Education
6. Harvest Timber
7. Orchards
8. Raise livestock
10. Wind Energy
Top 3 ideas for maintaining soils and supporting biodiversity. Include a description of why this plan is good for the soil and how it promotes biodiversity.
1.) Adopting regenerative agriculture practices: Regenerative agriculture practices such as cover cropping, crop rotation, and reducing tillage can help maintain soil health and support biodiversity. These practices promote the growth of soil microorganisms, which are essential for plant growth and nutrient uptake, while also preventing soil erosion and reducing the use of synthetic fertilizers and pesticides.
2.) Planting diverse crops and creating habitats: Planting diverse crops such as companion plants and incorporating wildflower strips or hedgerows can support biodiversity by creating habitats for pollinators and other beneficial insects. Creating habitats can also help to prevent soil erosion and improve soil structure by promoting the growth of deep-rooted plants.
3.) Composting and reducing waste: Composting food and yard waste can help to maintain soil health by adding organic matter to the soil, improving soil structure, and increasing nutrient availability for plants. Composting can also reduce the amount of waste sent to landfills, which can contribute to greenhouse gas emissions and other environmental issues. By reducing waste and composting, we can support biodiversity by reducing the impact of human activity on the environment.
Top 3 ideas based upon affordability. Include a description of the general costs of this plan and why it is less expensive than others.
1. Raise livestock: The quantity and affordability gap calls for an expansion of production of all protein and nutrient-dense sources, including from animals such as meats, dairy, eggs, and fish, and at more affordable prices to the final consumer. Significant investments in livestock production systems are required, especially in lower-income countries.
2. Community Garden: Community gardens make affordable, fresh produce available to all. Creating a community garden is an excellent way to make sure that all community members have access to healthy fresh produce that’s affordable too. Some of your neighbors might not be able to afford and pay the high prices of organic fruits, veggies, and herbs.
3. Tiny Houses: Tiny homes can mean big costs, especially depending on where you live
When it comes to tiny home affordability, North Dakota, New Hampshire and New Jersey rank at the top.
• Nationally, the average cost of a tiny home is $52,000, 87% cheaper than the average price of a typical home.
• Buyers, however, are paying more per square foot on tiny homes, 62% more.
Top 3 ideas based upon benefits to the citizens of Diversitopia. Include a description of how you believe people would use the land.
1. Community Garden:
• Increase access to fresh foods
• Improve food security [1]
• Increase physical activity through garden maintenance activities
• Improve dietary habits through education
• Increase fruit and vegetable intake
2. Community Recreation Area:
• Stay Healthy Longer Community recreation centers offer many programs that benefit both the body and mind. ...
• Reduce Stress The benefits of sports complexes not only help the body, but they also create a less-stressed mind. ...
• Benefits to Families ...
• Reduce Crime Rates with Children ...
• Recreation Centers Increase Property Value ..
• 3. Wildlife Preservation
• 1. Promotes pollination and continuity of native plant species Small animals, particularly bees, insects, butterflies, and birds, play an important role in food production. ...
• 2. Medicinal value ...
• 3. Aesthetic benefits ...
• 4. It is fun and entertaining! ...
• 5. Preserves heritage and culture
interstitial fluid represents one type of extracellular material. interstitial fluid represents one type of extracellular material. true false
The statement "Interstitial fluid represents one type of extracellular material" is true.
The volume of the extracellular fluid is equivalent to 20% of the body weight, divided into two main compartments, 5% of the weight corresponds to the plasma volume and the remaining 15% corresponds to the interstitial or extravascular fluid.
Sodium is the main cation of the extracellular fluid, chloride and bicarbonate the main anions.
The interstitial fluid is the indispensable medium that makes it possible to maintain homeostasis between the intracellular and extracellular areas.
It is made up of water that contains mainly fatty acids, amino acids, sugars, coenzymes, messenger substances such as cytokines, hormones, neurotransmitters and other substances such as mineral salts and waste products.
Therefore, we can conclude the main function of the interstitial fluid is to allow the exchange of water and represents one type of extracellular material.
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In an experiment, DNA from the linear form of the bacteriophage Lambda was cut into fragments using the restriction enzyme Hind III. Restriction enzymes are isolated from bacteria and cut DNA in specific locations. Hind III cuts the Lambda DNA between the adenine nucleotides on the complimentary strands in a specific sequence, as indicated in the diagram, producing eight different size fragments. These fragments are then separated with an electrical current based on size after the DNA fragments are placed in a porous gel, a process called gel electrophoresis. Two strands of DNA. The first strand begins with 5 prime, has a cut site indicated, and continues A A G C T T, 3 prime. The complementary strand is aligned below and starts with 3 prime, T T C G, a cut site, A A, 5 prime. Select an observation that best describes a correct aspect of the two processes of restriction digest and gel electrophoresis:
The pattern of DNA bands on a gel will be distinctive of those cut by Hind III; various restriction enzymes will not create the same fragments.
What is restriction enzymes?An enzyme that cleaves DNA into fragments at or near restriction sites inside molecules is referred to as a restriction endonuclease, REase, ENase, or restrictase. A smaller group of the larger endonuclease enzyme family are the restriction enzymes. Other restriction enzymes won't produce the same fragments; only Hind III will produce the pattern of DNA bands on a gel. A restriction enzyme is a bacterial protein that cleaves DNA at specific locations in order to produce DNA fragments with a known sequence at either end. Restrictions enzymes are necessary for some laboratory procedures, including genetic engineering and recombinant DNA technology.
Here,
The pattern of DNA bands on a gel will be unique to those cut by Hind III; other restriction enzymes will not produce the same fragments.
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6. In horses, black is dependent upon a dominant gene, B, and chestnut upon its recessive
allele, b. The trotting gait is due to a dominant gene, T, the pacing gait to its recessive allele, t. If
a homozygous black pacer is mated to a homozygous chestnut trotter, what will be the
appearance of the F1
generation?
The genotypes of the parents will be BBtt x bbTT. In this cross, a homozygous black pacer can only produce her one type of gamete, Bt, and a homozygous chestnut her trotter produces only her bT gametes.
What is punnett square?These are therefore combined to produce offspring that are heterozygous for both traits BbTt and express both dominant phenotypes.
When attempting to genotype phenotypic proportions of offspring, it is often necessary to construct and use basket square diagrams.
This chart allows individuals to determine specific phenotypic and genotypic ratios for specific hybrids. A Punnett square is a square plot used to predict the genotype for a given cross or breeding experiment.
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Which of the following is NOT a difference in the pathways by which fatty acids are degraded and synthesized?
-The presence or absence of a double bond,
- The location of the processes
- The molecule to which the chain being synthesized or degraded is attached
The presence or absence of a double bond is not a difference in the pathways by which fatty acids are degraded and synthesized.
which order shows the levels of organization from largest to smallest?organism, organ system, cell, organ, tissueorganism, tissue, organ system, organ, cellorganism, organ, organ system, cell, tissueorganism, organ system, organ, tissue, cell
Answer: Organism, Organ system, Organ, Tissue, Cell
homologous chromosomes migrate to opposite poles during _____.
Homologous chromosomes migrate to opposite poles during Anaphase.
Homologous chromosomes migrate to opposite poles during Anaphase of Meiotic cell division. Anaphase is the third stage of meiosis and is divided into two sub-stages Anaphase I and Anaphase II. During Anaphase I, the homologous chromosomes, which are identical in shape and size but carry different genes, are pulled towards the opposite poles by the spindle fibers. This is done by the separation of the sister chromatids at the centromere. This separation ensure that each pole receives one complete set of chromosomes, one from each parent, thus ensuring that each of the resulting cells will have the correct number of chromosomes and the correct genetic information.
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Biotechnology is changing the way we live. All of the following are now possibilities provided through biotechnology EXCEPT:
Answer:
Biotechnology is technology that utilizes biological system and etc. Biotechnology used to create novel diagnostics,vaccines,drugs and other medical countermeasures.
Explanation:
Without Biotechnology our life don't change. Because we get food,functions,techniques.So without Biotechnology this world can't walk.
The complexity and variety of organic molecules is due to ____.
a. the fact that they can be synthesized only in living organisms. b. their interaction with water. c. their tremendously large sizes. d. the variety of rare elements in organic molecules e. the chemical versatility of carbon atoms.
The complexity and variety of organic molecules is due to the chemical versatility of carbon atoms.
What is organic molecules?Organic compounds in chemistry are any chemical compounds that have carbon-hydrogen or carbon-carbon bonds. Millions of organic compounds have been identified as a result of carbon's capacity to catenate. Organic molecules are molecules composed of carbon and hydrogen, as well as other elements. Carbon atoms must be covalently bound to hydrogen atoms in organic compounds (C-H bonds). They typically include oxygen but may also contain nitrogen, sulfur, phosphorus, and other elements. Organic chemicals are so-called because they are linked to living beings. Carbohydrates, lipids, nucleic acids, and proteins are all examples of significant organic molecules. The concept of organic compounds is one of the more fundamental principles in Biological Chemistry. Organic now actually implies living.
Here,
The chemical adaptability of carbon atoms is responsible for the complexity and variety of organic compounds.
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Label each phase of the cell cycle in the figure below with the appropriate name or description. mitosis and cytokinesis Go phase G1 phase DNA replication last stage of interphase
Answer: Left: M phase
Middle left: protein synthesis
Middle bottom: S phase
Right: Go phase
Middle right: G1 phase
Explanation:
what is an evolutionary adaptation? what is an evolutionary adaptation? the ability of an individual to adjust to its environment a trait that an individual wants so that it can survive a trait that improves the fitness of its bearer, compared with individuals without the trait a trait that changes in response to environmental influences within the individual's lifetime
The process by which organisms adapt to their surroundings in order to increase their chances of surviving in that environment is known as evolutionary development, or simply adaptation.
A quality that a person desires to develop to increase their fitness or their capacity to adapt to their environment is the ability to change in reaction to their environment over the course of their lifetime.
What does a basic adaptation entail?The process through which organisms adapt to their surroundings to increase the likelihood that they will survive there.
An organism is what?A type of life made up of interdependent elements that support different vital functions.
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a cancer drug that prevents the shortening of microtubules would mostly affect which phase of mitosis? (1 point)
The drug would mostly affect the metaphase phase of mitosis, as microtubules are responsible for aligning the chromosomes along the metaphase plate.
Which stage of mitosis would be most impacted by a cancer medication that blocks microtubule shortening?Mitosis is the process of cell division in which the nucleus separates into two identical copies. During the process of mitosis, the cell goes through four different phases: Prophase, Prometaphase, Metaphase, and Anaphase. Of these four phases, a cancer drug that prevents the shortening of microtubules would most likely affect the Anaphase phase.Microtubules are important components of the mitotic spindle, which is a structure that forms between the two sets of replicated chromosomes during Prophase. As the cell progresses to Anaphase, the microtubules shorten and pull the two sets of replicated chromosomes apart.A cancer drug that prevents the shortening of microtubules would therefore disrupt this process, preventing the chromosomes from separating. This could lead to a failure of the mitotic process, resulting in an abnormal number of chromosomes in the daughter cells.In summary, a cancer drug that prevents the shortening of microtubules would most likely affect the Anaphase phase of mitosis. This would prevent the replicated chromosomes from separating, leading to an abnormal number of chromosomes in the daughter cells.To learn more about microtubule stabilization refer to:
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what structure is formed by the invagination of the larynx into the anterior wall of the laryngopharynx?
The structure formed by the invagination of the larynx into the anterior wall of the laryngopharynx is the piriform recess.
The pharynx is a tube that lies behind the mouth and nasal passages and connects them to the trachea. The pharynx is divided into three parts namely the nasopharynx, oropharynx and laryngopharynx.
The laryngopharynx is the part of the tube that sits below the throat near the larynx. The laryngopharynx regulates the entry of air into the lungs and regulates food and liquid entering the esophagus. At the bottom of the pharynx is the pyriform sinus or recess formed by the invagination of the larynx into the anterior wall of the laryngopharynx. Recess as a pair of side branches of the vocal tract.
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how many net gtps atps are formed via the citric acid cycle from pyruvate that is produced from the glycolytic metabolism of one molecule of glucose?
Pyruvate reaches the citric acid process and goes through oxidative phosphorylation, which results in the net synthesis of 32 ATP molecules under aerobic conditions.
What is a good case study for glycolytic?The Gustav Embden, Otto Meyerhof, & Jakub Karol Parnas-described Embden-Meyerhof-Parnas pathway is the most prevalent and well-known kind of glycolysis. The Entner-Doudoroff and Pentose Phosphate routes are two examples of other alternative pathways.
What more is known about glycolytic?In most cells, a series of ten chemical processes known as glycolysis—also known as the Embden-Meyerhof-Parnas pathway—breaks down glucose to release energy that is subsequently collected and stored in ATP.
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professor rhodus is lecturing about selective permeability of neurons. what would he tell the class?
As a professor discussing the selective permeability of neurons, Dr. Rhodus may provide the following information: Neurons are specialized cells that transmit electrical signals throughout the body. They have a selectively permeable membrane, meaning that only certain molecules can pass through it.
The selectively permeable membrane of neurons is composed of a lipid bilayer. The lipids in the bilayer are arranged in such a way that only certain molecules can pass through, while others are blocked.
The selectively permeable membrane of neurons is important for maintaining the electrical potential across the membrane, which is necessary for the transmission of electrical signals.
The selectively permeable membrane of neurons is selectively permeable to ions like sodium (Na+), potassium (K+), and calcium (Ca2+). For example, the membrane allows more positively charged potassium ions to flow out of the cell than positively charged sodium ions to flow in, which helps to establish a charge difference across the membrane called the resting potential.
Certain proteins are embedded within the selectively permeable membrane, called ion channels, which can open or close to allow ions to pass through, creating the electrical impulses that travel along the axon. The selectively permeable membrane of neurons also plays a role in communication between neurons.
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