When studying cells structure using a microscope the smallest unit of measurement
commonly used to describe findings is the nanometre. Explain why.

Answer:

When two or more forces act on an object, the resultant force can be found by adding up the individual forces.

Answer:

Explanation:

(a) The two variables being compared are the occurrence of accidents (drivers with accidents vs. controls) and the infection status with Toxoplasma gondii (infected vs. uninfected). In this case, the explanatory variable is the infection status with Toxoplasma gondii, and the response variable is the occurrence of accidents.

(b) To depict the data in a graph, we can create a 2x2 contingency table or a bar chart. Since the data is already provided in a 2x2 table format, we can use a bar chart to visualize the comparison between the variables.

markdown

                       | Infected | Uninfected |

------------------------------------------------

Drivers with accidents  |    21    |     38     |

Controls                |    38    |    211     |

In the bar chart, we would have two bars representing the occurrence of accidents: one for drivers with accidents and one for controls. Each bar would be divided into two sections representing the infection status: infected and uninfected.

To determine if the two variables are associated in this dataset, we need to assess if there is a difference in the distribution of infection status between the drivers with accidents and the controls. If there is a notable difference, it suggests an association between the variables.

The problem is comparing whether being infected with Toxoplasma gondii influences involvement in car accidents. An explanatory graph can be created and a statistical analysis such as chi-square test can give a more accurate inference on the association between these two variables.

(a) The two variables being compared in this problem are 'status of being infected with Toxoplasma gondii' and 'involvement in car accidents'. Here, the explanatory variable is 'status of being infected with Toxoplasma gondii' because we are examining its effect on the response variable, 'involvement in car accidents'.

(b) For depicting the data in a graph, one could create a bar graph with two variables 'Infected' and 'Uninfected', represented along the horizontal x-axis. The vertical y-axis could represent the quantity of people from the two groups: 'Drivers with accidents' and 'Controls'.

If the bar of 'Infected' drivers with accidents is significantly higher than 'Infected' controls, then we can say these two variables are associated in this data set. Otherwise, the association is not significant. To be sure, a statistical test such as chi-square test would provide a more definitive answer.

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Answer:

the guy above is right.

Explanation:

Elements W and Z are metals, Elements X and Y are nonmetals, but Element X is in Group 18 (noble gas). Therefore, the correct option is option A.

Periodic Properties: Periodic properties are those that exhibit a regular gradation as we travel from left to right inside a period either from top to bottom inside a group and are either directly or indirectly connected to their electrical arrangement.

Atomic size, ionization energy, electron affinity, electronegativity, polarity, density, atomic volume, melting, and other essential periodic features are only a few. Elements W and Z are metals, Elements X and Y are nonmetals, but Element X is in Group 18 (noble gas).

Therefore, the correct option is option A.

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Answer:

D

Explanation:

Answer:

a mixture of elements

Explanation:

hope that helped

a. The Great Smoky Mountains National Park: Nonexcludable and rivalrous. Free rider problem likely.

b. Luetta Moore Park playground: Nonexcludable. No free rider problem.

c. National defense: Nonexcludable and nonrivalrous. Free rider problem exists.

d. Subway train: Nonexcludable. Free rider problem possible during peak hours.

a. The Great Smoky Mountains National Park: It is nonexcludable because it is difficult to prevent individuals from accessing the park. However, it is rivalrous as the park's resources, such as campsites or parking spaces, can be depleted. Both nonexcludability and rivalry suggest that the park is both nonexcludable and rivalrous. The free rider problem may occur since people can enjoy the benefits of the park without paying for its maintenance or preservation.

b. Playground at Luetta Moore Park: The playground is nonexcludable since it is difficult to prevent people from using it. However, it is nonrival as one person's use does not diminish the usability of the playground for others. Therefore, it is only nonexcludable. The free rider problem may not apply here since the use of the playground does not impose costs on others.

c. National defense: National defense is both nonexcludable and nonrival. It is nonexcludable because it is challenging to exclude individuals from benefiting from defense. It is nonrival because the defense provided to one person does not diminish the defense available to others. Both characteristics make national defense both nonexcludable and nonrival. The free rider problem is prevalent in national defense since individuals can benefit from defense without incurring the costs associated with it.

d. Subway train: A subway train is nonexcludable since it is difficult to prevent individuals from using it. However, it can be rivalrous during peak hours when overcrowding may limit the available space. Therefore, a subway train is only nonexcludable. The free rider problem may not be significant here as long as there are no capacity constraints or overcrowding issues.

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Answer:

Explanation:

The glycosidic bond in DNA is the nitrogen-carbon coupling in between the 9′ nitrogen of purine bases (Adenine/Guanine) or the 1′ nitrogen of pyrimidine bases (Cytosine/Thymine) as well as the 1′ carbon of the deoxyribose sugar group. The synthesis of nucleoside arises from the binding of the nitrogenous base to the deoxyribose sugar via N-glycosidic linkage.

Answer:

c. Algae to fish to grizzly bear to fungi

Explanation:

Algae are the producers in Yellowstone trophic levels which can be eaten by fish which is a primary consumer. The grizzly bear which is a secondary consumer or carnivores feed on these fish and when the grizzly bear die, fungi which is a decomposer feeds on the grizzly bear and release nitrogenous substances which can be used by the algae for its growth and development. Only 10% of energy is transferred from on trophic level to another whereas the remaining 90% are released in the form of heat energy.

Answer:

it is a i just did it

Explanation:

Answer:

B - the second option is the correct answer

Explanation:

I'm right trust me

Answer:

Because glucose is used by plants for energy and to make other substances like cellulose and starch. Cellulose is used in building cell walls. Starch is stored in seeds and other plant parts as a food source. That's why some foods that we eat, like rice and grains, are packed with starch.

Explanation:

Sugars facilitate the assimilation of nutrient elements and their transport by the plant since they reduce osmotic pressure, thus improving their entry into plant tissues. During vegetative development, transport takes place towards the stem and root tips.

The functions of the erector spinae muscles include extension, flexion, lateral flexion, and rotation of the spine.

The erector spinae muscles are a group of muscles located in the back. They consist of three main muscles: the iliocostalis, longissimus, and spinalis. These muscles play a crucial role in maintaining posture and facilitating movement.

One of the primary functions of the erector spinae muscles is extension of the spine. They help us stand upright and maintain an erect posture. When these muscles contract, they pull the spine backward, allowing us to extend our back.

The erector spinae muscles also assist in flexion of the spine. When we bend forward, these muscles contract to help us flex our spine and bring our torso closer to our legs.

In addition to extension and flexion, the erector spinae muscles enable lateral flexion of the spine. This means they allow us to bend our torso sideways, facilitating movements such as side bending.

Furthermore, the erector spinae muscles contribute to the rotation of the spine. They allow us to twist our torso, enabling movements like turning our upper body to the left or right.

Overall, the erector spinae muscles provide stability and support to the spine, enabling us to perform various movements and maintain proper posture.

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The erector spinae muscles play a crucial role in the movement and stabilization of the spine.

They are a group of muscles located on either side of the vertebral column, extending from the base of the skull down to the pelvis. The functions of the erector spinae muscles include:

Spinal Extension: The primary function of the erector spinae muscles is to extend the spine, allowing you to stand upright and maintain an erect posture. These muscles work together to counteract the forward bending (flexion) of the spine and promote extension.

Spinal Flexion: While their primary function is extension, the erector spinae muscles also contribute to spinal flexion, especially in the lower back region. They control the movement of the spine during forward bending, such as during activities like bending down to pick something up.

Spinal Lateral Flexion: The erector spinae muscles also assist in the lateral flexion of the spine, allowing you to bend or tilt sideways. When one side of the erector spinae muscles contracts more than the other, it results in lateral bending or side-to-side movements.

Spinal Rotation: The erector spinae muscles provide some rotational control of the spine. They assist in rotating the torso to the left or right, helping with movements like twisting or turning the upper body.

Postural Support: These muscles contribute to maintaining proper posture and spinal alignment. They work to stabilize the spine and prevent excessive movement or misalignment during various activities, including sitting, standing, and lifting objects.

Core Stability: The erector spinae muscles are part of the deep core muscles, along with the abdominal muscles, pelvic floor muscles, and other muscles of the trunk. Together, these muscles provide stability and support to the spine and help transfer forces between the upper and lower body.

Overall, the erector spinae muscles are vital for maintaining proper spinal alignment, supporting posture, and facilitating various movements of the spine, including extension, flexion, lateral flexion, and rotation.

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Answer:

B

Explanation:

Answer:

i will go along with b

Explanation:

go get the answer right

Validity refers to Accuracy.

The degree to which a measurement is correct in respect to its true value. The degree to which the same results are produced by repeated measurements under the same settings is known as precision.

In order for a notion or measurement to be considered genuine, it must accurately reflect the real world.

When discussing validity in psychiatry and psychology, it is frequently in the context of psychometrics—the study of psychological measurement.

Hence , we can say that validly refers to Accuracy.

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Answer:

isn't that a mitochondria

Explanation:

I would say to provide cells with energy for their activities

The atomic mass of the chemical element in period 2, group 13 is: 26.982 u

A periodic table can be defined as an organized tabular array of all the chemical elements typically arranged in order of increasing atomic number (in rows).

Basically, a periodic table comprises eighteen (18) columns and seven (7) rows.

Groups, families of elements are represented by the vertical rows on the periodic table while the periods of chemical elements are represented by the horizontal columns.

On the periodic table, the chemical element that is found in period 2, group 13 is Aluminum (Al) with an atomic number of 13 i.e it has 13 protons.

In conclusion, the atomic mass of Aluminum (Al) is 26.982 u and it is found in period 2, group 13 of the periodic table.

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The humans were able to develop agriculture at the beginning of the Holocene Period as the ice from the previous ice age melted and the climate was warmer. The correct option is B.

The current geological epoch is the Holocene. It began approximately 11,650 years ago, following the Last Glacial Period, which ended with the Holocene glacial retreat.

The Quaternary period is comprised of the Holocene and the preceding Pleistocene.

Agriculture and civilization were made possible by the Holocene's unusually warm and stable climate.

Previously, year-to-year temperature and rainfall variations made agriculture too unreliable to support settled communities with large populations.

Thus, the correct option is B.

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the duration of contact is extended The force felt by a boxer as they move away from a blow is lessened since the punch has more time to make contact with them.

Impulse is the result of the force as well as the moment of application, and this notion explain why "rolling with both the punches" in boxing is effective. Since force is inverse proportional to time, when he moves his head forward the time increases and as a result the impact of force decreases. As a result, the boxer hits a very little bit less forcefully. A. It lengthens the impact period while lessening the force of the hit. The moment of impact and force are decreased when the boxer travels towards the strike.

(When a boxer is moving away from a punch, the force experienced is reduced because

A) momentum transfer is reduced.

B) the time of contact is increased.

C) the force is less effective.

D) all of the above)

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If the producer population is depleted because there are more primary consumers or herbivores, it means that the population of organisms that produce their own food, such as plants, is being consumed at a faster rate than it can reproduce.

This can lead to a decrease in the overall biomass of the ecosystem and can have negative impacts on the food chain. Herbivores, or primary consumers, play an important role in maintaining the balance of an ecosystem by consuming plants and other producers. However, if their population grows too large, they can deplete the population of producers, leading to a decrease in the amount of food available to other consumers.

In addition, a depletion of the producer population can have cascading effects throughout the ecosystem. For example, if there are fewer plants available to secondary consumers, such as carnivores or omnivores, they may not have enough food to survive. This can lead to a decline in their population as well, which can further impact the ecosystem.

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Full Question ;

If you were to remove the top predator (a tertiary or secondary consumer) in a food web or food chain?

There is a small diffusion distance because the membrane is thin (lungs).

The respiratory membrane, located in the lungs, is a crucial structure responsible for the exchange of oxygen and carbon dioxide between the air in the alveoli and the blood in the capillaries.

It consists of three distinct layers: the alveolar epithelium, the capillary basement membrane, and the capillary endothelium. These layers create a thin and delicate barrier that allows for efficient gas exchange.

The diffusion distance plays a vital role in this process. The thinner the membrane, the shorter the diffusion distance, resulting in a more rapid and efficient exchange of gases. In the case of the lungs, the respiratory membrane is indeed thin, allowing for a small diffusion distance.

This characteristic enables oxygen to quickly diffuse from the alveoli into the capillaries, while carbon dioxide diffuses in the opposite direction, from the capillaries to the alveoli.

As a result, the sentence that fills in the blank and fits the given terms is: "There is a small diffusion distance because the membrane is thin (lungs)."

This statement accurately describes the unique characteristic of the respiratory membrane in the lungs, which facilitates efficient gas exchange.

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Answer:

89 years

Explanation:

In 1808, John Dalton said that atoms were a solid sphere. It was until 1897 that J.J. Thompson discovered there were electrons, he said these electrons were scattered around in the atom like a plum pudding.

Answer:

Prokaryotes are single-celled organisms of the domains Bacteria and Archaea. All prokaryotes have plasma membranes, cytoplasm, ribosomes, a cell wall, DNA, and lack membrane-bound organelles. Many also have polysaccharide capsules. Prokaryotic cells range in diameter from 0.1–5.0 µm.

Answer:

The answer is side chain/group.

Answer:

d

Explanation:

True. In the human heart, the muscular structure of the ventricles enables them to pump blood a greater distance than the atria can.

True. In the human heart, the muscular structure of the ventricles enables them to pump blood a greater distance than the atria can. The atria are smaller and have less muscular walls compared to the ventricles that are larger and have more muscular walls. The left ventricle is responsible for pumping oxygenated blood to the rest of the body, while the right ventricle pumps deoxygenated blood to the lungs for oxygenation. The ventricles are chambers that pump blood through the circulatory system. They act as pumps and distribute blood throughout the body. The ventricles, unlike the atria, must have thicker, more muscular walls to produce the necessary force for blood to circulate throughout the body. In summary, the muscular structure of the ventricles in the human heart enables them to pump blood a greater distance than the atria can. The ventricles have thicker, more muscular walls, which helps produce the necessary force for blood to circulate throughout the body.

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Answer:

B, Isotonic solution

Explanation:

In an isotonic solution, the flow of water in and out of the cell is happening at the same rate.

Answer:

A. hypotonic

Explanation:

In an isotonic solution, the flow of water in and out of the cell is happening at the same rate. Figure 9.7. 1: Red blood cells in hypertonic, isotonic, and hypotonic solutions.

The shape of proteins are affected by temperature and pH.

The change of shape of proteins is known as denaturation.

Denaturation of a protein will make it unable to function.

Proteins are large molecules which are found in living organisms.

The shape of proteins are affected by temperature and pH of their environment.

The change of shape of proteins is known as denaturation.

Denaturation of a protein will make it unable to function since protein function depends on its shape.

In conclusion, protein denaturation affects its function.

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Answer:

b

Explanation: