_______ are estimates because energy needs depend on energy expenditure and, in some cases, the energy needed to support growth or human milk production.

Answer:

Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.

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Tysm!

Answer:

breathing allows the exchange between 2 gases: oxygen and carbon dioxide. Gas exchange occurs in millions of lung alveoli and the capillaries that surround them

Explanation:

Answer:

The gills actively uptake salt from the environment by the use of mitochondria-rich cells. some marine fish, like sharks, have adopted a different, efficient mechanism to conserve water, osmoregulation. they retain urea in their blood in relatively higher concentration.

Explanation:

Traits like intelligence, height, and even disease resistance are the product of many millennia of natural selective pressures from the external environment influencing human biology.

Natural selection is the process by which certain traits become more or less common in a population over time based on their ability to help individuals survive and reproduce. In the case of human evolution, environmental pressures such as climate, diet, and competition for resources have all played a role in shaping our genetic makeup.

For example, humans who were better able to adapt to changing environments and find food sources were more likely to survive and pass on their genes to future generations. This could manifest as traits such as increased intelligence, problem-solving abilities, and tool-making skills. Similarly, individuals who were taller and stronger may have had an advantage in hunting and defense, allowing them to pass on genes for these traits.

On the other hand, certain genetic mutations that provided protection against diseases like malaria or tuberculosis would have also been advantageous for survival and reproduction. As a result, populations in regions where these diseases were prevalent developed a higher frequency of these protective mutations over time.

Overall, natural selection has played a significant role in shaping human biology and the traits that we possess today. These traits are not just the result of individual choice or chance, but rather the product of millennia of environmental pressures acting on our genetic makeup.

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Different chromosome counts would be present in the ensuing daughter cells.

The mitotic cyclin is normally present in high concentrations in G2. Why, if the mitotic cyclin is present, is cdc2 not active during G2? Phosphorylation is another mechanism that controls Cdc2.

If the anaphase-promoting complex/cyclosome (APC/C) failed to ubiquitinate securin, what would you anticipate happening? As long as the cohesin complex exists, the cell won't enter anaphase.

Even if the cells weren't prepared, the process of mitosis would still proceed.

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Respuesta:

1) Sistema Nervioso Simpático.

2) Primero, Sistema Nervioso Parasimpático. Luego, Sistema Nervioso Simpático.

3) Sistema Nervioso Parasimpático.

Explicación:

La pregunta está incompleta, falta la siguiente parte:

2) Estás durmiendo luego de una abundante cena, de pronto, sentís unos golpes tremendos, te tiran la puerta abajo y unos encapuchados te apuntan con algo que parece un arma ¡chau digestión! Sentís que los músculos se ponen cada vez más tensos.

3) Tus amigos te jugaron una broma pesada. ¡Los querés matar! Sentís que poco a poco tus pulsaciones vuelven al ritmo normal ¡Qué día!

Respuesta:

El sistema nervioso es un conjunto de células que controlan todas las funciones del cuerpo, incluyendo órganos y músculos. Para llevar a cabo dichas funciones, el sistema nervioso se encuentra dividido en dos grandes partes:

El SNP, se divide entonces en Sistema Nervioso Somático, el cual conecta al SNC con todos los músculos para modular sus movimientos voluntarios e involuntarios y transmite la información desde el exterior hacia el interior. Y también se divide en Sistema Nervioso Autónomo (SNA) el cual a su vez presenta otras dos ramificaciones:

Por lo tanto, el SNA se encuentra en la periferia y desde el cerebro salen nervios hacia todo el cuerpo, llamados fibras eferentes, enviando información de las vísceras y algunos órganos para controlar sus funciones de acuerdo a los estímulos percibidos. Por lo tanto, esta división del sistema nervioso controla movimientos involuntarios como la digestión, presión sanguínea, reflejos involuntarios, etc.

Por ejemplo, frente a una situación de estrés o de peligro, el Sistema Nervioso Simpático hace que el cuerpo entre en un estado de alerta para así estar preparado para defenderse y/o huir. Entonces, se envían señales a glándulas y músculos para que lleven a cabo ciertas funciones como dilatar pupilas, liberar adrenalina, inhibir la digestión, aumentar la presión sanguínea, etc. Todo esto ayuda al cuerpo a utilizar las energías disponibles para huir o defenderse frente al peligro y no malgasta las energías en funciones que no son prioridad en ese momento (como la digestión, entre otras) Cuando la situación se termina y la persona se tranquiliza, el Sistema Nervioso Parasimpático retorna al organismo hacia un estado de equilibrio causando la constricción de pupilas, liberando acetilcolina estabilizando la presión, retomando la digestión, etc. De esta manera, el organismo continua llevando a cabo sus funciones normales.

1) En este caso, la persona se encuentra muy nerviosa por estar siendo evaluada por un profesor y frente a toda la clase. Entonces, el Sistema Nervioso Simpático hace que la sangre se dirija a los músculos y el cuerpo se prepara para "huir" dejando de lado otras situaciones como ir al baño. La sudoración tiene la función de bajar la temperatura corporal, y los temblores vienen por parte de las palpitaciones y la presión sanguínea alta.

2) Mientras la persona duerme y hace la digestión, actúa el Sistema Nervioso Parasimpático, ya que el cuerpo se encuentra tranquilo y en resposo, sin situaciones estresantes o de peligro y puede funcionar de forma normal como siempre. Pero en el momento en el que la persona escucha ruidos, se despierta de golpe y al ver gente extraña la persona se pone nerviosa, se inhibe la digestión y otras funciones no primordiales para la supervivencia y la persona se encuentra en estado de alerta. En este caso, actúa el Sistema Nervioso Simpático. También se tensan los músculos, preparándose para ser usados y escapar.

3) Cuando la persona se da cuenta que los encapuchados eran amigos y solo era una broma, se calma, y baja el ritmo cardíaco por lo que actúa el Sistema Nervioso Parasimpático. La persona ya no necesita estar en estado de alerta para escaparse y huir.

ACh is released into the synaptic cleft in response to an action potential in the motor neuron. Gradient potentials are started when ACh binds to sarcolemma receptors.

The ryanodine receptors (RyRs) in the SR also open and release calcium as a result of the action potential's invasion of the T-tubules, which opens the L-type calcium channels and stimulates contraction.\

Sodium ions within a muscle cell start the action potential. When a muscle contracts, calcium ions are released into the muscle cell, strengthening the muscle. This occurs after the cell becomes positive, starting the action potential.

ACh is released into the synaptic cleft in response to a motor neuron action potential.

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Cranial Nerve V, one of 12 cranial nerves, provides sensation to the face and motor function for chewing muscles. Divided into three branches, it controls ophthalmic, maxillary, and mandibular nerves.

The cranial nerve number for the trigeminal nerve is Cranial Nerve V. The Trigeminal nerve is one of the 12 cranial nerves, and it is the largest of the cranial nerves. It is also known as Cranial Nerve V. The trigeminal nerve provides sensation to the face and the motor function of the muscles used in chewing. It is a mixed cranial nerve that contains both sensory and motor fibers. The trigeminal nerve is responsible for sensation in the face and is also responsible for the motor functions that allow us to chew.

The trigeminal nerve is divided into three branches: the ophthalmic nerve, the maxillary nerve, and the mandibular nerve. Each of these branches provides sensation to different areas of the face. In conclusion, the trigeminal nerve is cranial nerve number V and it provides sensation to the face and the motor function of the muscles used in chewing.

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Answer:

genetic material

protoplasm

cell membrane

etc

Answer: 2. Each SO2 molecule contains 2 atoms of oxygen.

Explanation:

Answer: 1 sulfur atom

Explanation:

Answer:

no

Explanation:

Answer:

fish is great food for bears...bears are good fisherman's and so yes, fishes and bears are related.

Answer:

1

Explanation:

Answer:

I'm pretty sure it's the two different types of wings

Explanation:

I took the test and it said it was the bee wing but not the crab claw

Whales and hummingbirds are categorised as vertebrates, which means they are both animals with backbones. Both of them evolved from terrestrial creatures. Some experts think that a small, furry, four-legged creature that existed around 330 million years ago is the ancestor of both whales and hummingbirds.

The metabolism of hummingbirds and whales is one similarity. Hummingbirds drink a lot of nectar, which is rich in sugar and requires a lot of energy to keep their wings continuously flapping. Whales, on the other hand, don't use a lot of energy to stay warm because they live underwater and have a relatively slow metabolism.

However, in order to power their movements during a hunt, they need an enormous amount of energy. The high fat content of their meal, such krill or small fish, is where they get this energy.

The ability to migrate is another similarity between hummingbirds and whales. To go to their breeding or wintering areas, hummingbirds have been known to travel hundreds or even thousands of miles in the air. Similar to how some whale species may migrate thousands of miles, this is also known. For instance, grey whales travel to the warm seas off the coast of Mexico from their feeding areas in the Arctic to mate and give birth.

Both species have exceptional adaptations that have developed over time to enable these long, energy-intensive migrations, which demand a lot of preparation and energy.

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Terrestrial Creatures: Animals are that can survive and reproduce on land.

Metabolism: The chemical reactions that take place inside a living thing to keep it alive.

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Test tube racks are pieces of scientific equipment used to keep many test tubes upright at once.

They are most frequently employed when several distinct solutions must be utilised simultaneously, for safety reasons, for the secure storage of test tubes, and to facilitate the transportation of several tubes. A test tube rack is a piece of lab equipment used to simultaneously keep several test tubes upright. When numerous solutions are being worked on or gathered at simultaneously, they are very helpful for organising test tubes. As it prevents the effects of dangerous chemicals falling on the body and skin, it is also used to hold test tubes while performing essential chemical reactions.

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Answer:

When an oceanic and a continental plate collide, eventually the oceanic plate is subducted under the continental plate due to the high density of the oceanic plate. Once again a benioff zone forms where there are shallow intermediate and deep focus earthquakes.

Explanation:

Answer:

Explanation:

Race car drivers and teams monitor the engine for how effective it is transferring energy from potential and kinetic through RPM, or how fast the engine is moving. Kinetic energy inside the engine is transformed from chemical energy (fuel, air and spark plugs) to mechanical energy.

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Answer:

Antibodies activate the complement system to destroy bacterial cells by lysis (punching holes in the cell wall)

Explanation:

Answer:

i think C

Explanation:

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

To improve the reliability of these results, the student should repeat the experiment using a larger sample size (Option D).

Based on the data, 9 out of 10 seeds germinated when planted under the soil, and 8 out of 10 germinated when scattered on top of the soil.

The student's hypothesis that lettuce seeds wouldn't germinate without soil coverage is disproven by the results.

However, to improve the reliability and conclusiveness of the results, the student should repeat the experiment using a larger sample size (Option D).

This would allow for more data points, reducing the impact of any outliers or random occurrences and providing a more accurate representation of the germination process.

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The probable question may be "What other factors could potentially affect the germination rate of lettuce seeds, and how could they be controlled in future experiments to improve the accuracy of the results?"

Answer: B. white-eyed female

Explanation: Took biology

Answer:

B. White eyed female

Explanation:

The genotype consist of two recessive alleles (rr). When there are two recessive alleles the phenotype will be the recessive trait which in this case is white eyes

Answer:

Frying an egg

Cutting butter

Explanation:

Frying an egg is changing the liquids and forming them into a harder substance. Cutting butter is breaking apart the particles that keep it together. Those are examples of chemical change.

Answer:

Self-replicating: Plasmids contains origin of replication and hence they are able to multiply by themselves independently of the chromosomal DNA. They maintain their number in progenies.

ii) Low molecular weight: Plasmids have low molecular weight which makes them easy to handle and hence can be present in multiple copies.

iii) Multiple Cloning Sites: This is a site on plasmid which has recognition sites for many restriction enzymes.

iv) Selectable Marker:  Plasmid has certain genes which help in identifying the transformed cells. For example, antibiotic resistance genes.

v) High copy number: Due to low molecular weight of plasmids, they are present in multiple copies. High copy number plasmids are require to produce large quantities of the recombinant DNA.

vi) Host range: Plasmids used as coning vectors have narrow host range so that transmission of these plasmids to other organism in environment is avoided.

Explanation:

The Theory of Constraints addresses bottlenecks in mask production. The US government expedited vaccine development and production, increased funding, and secured essential supplies to remove constraints.

The Theory of Constraints (TOC) can be applied to the production of breathing masks in the United States by identifying and addressing the bottlenecks or constraints that hinder the production process. For example, during the early stages of the COVID-19 pandemic, there was a shortage of raw materials, manufacturing capacity, and distribution channels for masks. TOC would suggest focusing efforts on alleviating these constraints to increase mask production. This could involve sourcing additional raw materials, expanding manufacturing capabilities, optimizing production lines, and streamlining distribution logistics.

Regarding vaccine production, the U.S. government implemented several measures to remove constraints. They worked to expedite the regulatory approval process for vaccines, facilitating faster development and production. The government provided funding to vaccine manufacturers to expand their manufacturing capacity and ramp up production. They also invoked the Defense Production Act to secure essential supplies and equipment needed for vaccine production. These actions aimed to eliminate constraints such as limited production capacity, logistical challenges, and supply chain disruptions, allowing for a more efficient and accelerated vaccine production process.

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The correct question is:

Looking at the recent Covid situation, how would you say the Theory of Constraints applied to the production of breathing masks in the United States? What did the U.S. government do to remove constraints when it came to vaccine production?

The answer would be SOIL.

Primary succession refers to the ecological succession that occurs in a new land where life has not yet existed. It takes place after a lava flow cools and hardens into a new land, or when a glacier recedes and exposes new land. Because the land that results from these processes is totally new land, the soil must first be produced. On the other hand, secondary succession happens in a formerly inhabited area that was disturbed. The disturbance could be a fire, flood, or human action such as farming. Secondary succession is faster because the soil is already in place. In this case, the pioneer species are plants such as grasses, birch trees, and fireweed. Organic matter from the pioneer species improves the soil. This lets other plants move into the area.

Answer:

True

Explanation:

if multiple scientist do the same thing that means they are replicating the experiment

The statement "An experiment is replicable if a different scientist can do the experiment and get the same results" is definitely true.

A scientific experiment may be defined as a complete set of procedures that are carried out under controlled conditions in order to determine the validity and accuracy of a hypothesis or construct a discovery.

If multiple scientists construct the same hypothesis and perform identical research and received the same results. It implies that they are just replicating the same experiment number of times.

But the only difference is that they understand different things and methodology very closely based on such outcomes. This gives each scientist a sense of special perception based on facts and evidence.

Therefore, the statement "An experiment is replicable if a different scientist can do the experiment and get the same results" is definitely true.

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Answer:

yes it is.

Chromatography method help combat toxic food colorings

(a) Test statistic:

The slope of the regression line is given as 1.16, while the standard error for the slope is given as 0.33. The test statistic is calculated as:

Test Statistic = (slope - Null Value) / Standard Error

H0: slope = 0Ha: slope ≠ 0

At a 5% level of significance, the two-tailed test has a critical region of zα/2=1.96. We will reject the null hypothesis if the test statistic is less than -1.96 or greater than 1.96.

Test Statistic = (slope - Null Value) / Standard Error = \(\frac{(1.16 - 0)}{0.33}\) = 3.5152

The calculated test statistic is 3.52 (rounded to two decimal places).

(b) A hypothesis test was done for the slope of the least squares regression line, and a P-value of 0.0012 was found.

We will use α = 0.05.

At the 5% level of significance, the null hypothesis will be rejected if the p-value is less than 0.05. Since the calculated p-value of 0.0012 is less than 0.05, we will reject the null hypothesis.

Hence, the appropriate conclusion is to reject the null hypothesis and conclude that there is sufficient evidence of a linear relationship between the concentration of food and the height of the plant.

The correct option is: Reject the null hypothesis and conclude that there is sufficient evidence of a linear relationship between the concentration of food and the height of the plant.

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Answer:

The earthquakes of California are caused by the movement of huge blocks of the earth's crust- the Pacific and North American plates. ... About two-thirds of this movement occurs on the San Andreas fault and some parallel faults

Given what we know, we can confirm that as scientists study fossil records, they can learn much about the species, such as the traits and activities of the organisms in question.

Therefore, we can confirm that scientists will use body fossils to learn more about the traits and diets of early organisms while using the uncovered trace fossils to track the activities of these organisms.

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Answer:

85

Explanation:

The reason this is 85 is because when the body fossil and trace fossils are in the same place they are actually connecting and being a helpful

Answer:

B

Explanation:

Answer: Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits. ... Recessive alleles only show their effect if the individual has two copies of the allele

Explanation:

hope this helps! you might need to change some words around though