Why is it that cancer does not form every time there is a mistake during the cell cycle?

The experiment carried out by Avery, MacLeod, and McCarty in 1944 established that DNA is the genetic material that carries genetic information. This experiment was conducted on the bacterium Streptococcus pneumoniae, which is a pathogen that causes pneumonia in humans.

This bacterium can exist in two forms, a rough strain and a smooth strain. The S strain is surrounded by a polysaccharide capsule, while the R strain does not have a capsule. When mice were injected with the S strain, they developed pneumonia and died.

On the other hand, the mice injected with the R strain were healthy.The researchers used enzymes to degrade proteins, RNA, and DNA from the heat-killed S strain. They then added the three enzymes to the living R strain and found that the transformation still occurred, indicating that none of the enzymes destroyed the transforming ability.

They then repeated the experiment with different enzyme combinations and found that when DNase was added to the living R strain, the transformation did not occur. This finding led them to conclude that DNA is the genetic material that carries genetic information.

Therefore, the fact that the transforming capacity of the IIIS cell extract was not abolished by treatment with RNase proves that RNA does not function as the genetic material in the IIIS cells (Diplococcus pneumoniae). Hence, option (D) is the correct answer.

This experiment provided important evidence that DNA is the genetic material that carries genetic information and paved the way for future genetic research.

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Answer:

Energy Processing Organelles: Mitochondria and Chloroplasts.

Answer:

Energy:

The rate of movement per unit time of an object relative to all the other objects in the universe.

Generally we have it relative to the road on earth. For instants, you could travel 80 miles per hour relative to the road.

Answer:              

Energy:

- power is derived from the utilization of physical or chemical resources, especially to provide light and heat to work machines.

- the strength and vitality for sustained physical or mental activity.

Explanation:

Answer:

a biographic isolation affects de random changes that take place within gene pools

One-quarter of the progeny will be genuine breeding, as with every dihybrid cross.

A dihybrid cross is a mating event in which two dihybrid individuals mate. As a result, the offspring phenotypic ratio is 9:3:3:1.

Both the product rule and the Punnett Square techniques revealed that the progeny of a dihybrid cross, such as Mendel's RrYy RrYy, should have a 9:3:3:1 phenotypic ratio.

True breeding implies that all crossings will produce children with the same phenotype, suggesting that the organism is homozygous for all genes. For example, a true-breeding purple plant crossed with itself will always produce purple offspring.

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Supportive cartilage disappears from the bronchial tree at the level of D. respiratory bronchioles.

Respiratory bronchioles are the smallest bronchioles that conduct air in the lungs, they are the branches of the terminal bronchioles that subdivide into several tiny tubes called alveolar ducts. Each alveolar duct divides into several alveolar sacs, and each sac contains several alveoli that are the basic functional unit of the lung. Respiratory bronchioles are lined with cuboidal epithelium that lacks mucous glands and goblet cells. They have smooth muscle fibers in their walls that regulate air flow into and out of the lungs.

The supportive cartilage disappears from the bronchial tree at the level of respiratory bronchioles because their walls become thinner as they enter deeper into the lung tissue. The absence of cartilage in respiratory bronchioles enables them to dilate and constrict efficiently during respiration. Apart from respiratory bronchioles, cartilage rings are present in the walls of trachea, primary bronchi, and bronchioles.

Their presence helps to maintain airway patency and protect the airway from collapse during breathing. In contrast, the absence of cartilage in respiratory bronchioles allows them to collapse during expiration, increasing the efficiency of gas exchange between blood and air. So the correct answer is D. respiratory bronchiotes is the level supportive cartilage disappears from the bronchial tree.

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Answer:

Cytokinesis occurs differently in animal and plant cells. In animal cells, the plasma membrane of the parent cell pinches inward along the cell's equator until two daughter cells form. In plant cells, a cell plate forms along the equator of the parent cell.

Explanation:

Cytokinesis occurs differently in animal and plant cells. In animal cells, the plasma membrane of the parent cell pinches inward along the cell's equator until two daughter cells form. In plant cells, a cell plate forms along the equator of the parent cell.

This is because he consumes 100 grams of protein each day, and it is not mentioned that he consumes any additional protein beyond this amount.

What is ATP?

ATP stands for adenosine triphosphate, which is a molecule that is commonly referred to as the "energy currency" of the body. ATP provides the energy that is required for most cellular processes, including muscle contraction, nerve impulse transmission, and protein synthesis.

The structure of ATP consists of three phosphate groups attached to an adenosine molecule. When ATP is used to provide energy for cellular processes, one of the phosphate groups is broken off, releasing energy in the process. This results in the formation of ADP (adenosine diphosphate), which can be converted back into ATP through the addition of a phosphate group.

We also know that 25 grams of the protein he consumes is used to make ATP, which is the primary energy source used by the body. This means that Marcus's body requires a significant amount of energy each day, and that he is likely consuming enough calories to support this energy demand.

Finally, we know that 25 grams of the protein he consumes is used to synthesize body fat. This suggests that Marcus may be consuming more calories than he needs, as excess calories are typically stored in the body as fat.

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Answer:

stationary front

Explanation:

When a warm air mass and a cold air mass meet, but they push at each other and neither one can move, it is called a/an Stationary front

Answer:

Explanation:

Yes, different colors of light affect the direction of plant growth.

The direction the plant is growing in can be found by using a directional compass.

You can use a bar chart or a line graph.

The presence or absence of light can affect the rate of plant growth.

Plants require sunlight to grow as they use sunlight to produce their food through the process of photosynthesis.

The different colors of light can affect the direction of plant growth.

Hence, it can be concluded that the presence, as well as the color of light, affects the rate and direction of plant growth.

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Answer:

Large intestine

Explanation:

Hope it helps

If the eye-blink neurons are stimulated by blue light, the animal will because the neurons will be not blink; GABA; depolarized

Thus B is the correct option.

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A cell uses a variety of procedures to turn carbohydrates into energy. The initial and most fundamental one is known as glycolysis. Hexose sugars are used to fuel it. This lengthy procedure only expels a modest quantity of energy.

The energy needed by your body to function comes from glucose. The body receives glucose from the consumption of carbs. You get four calories of energy from every gramme of carbohydrates you eat. When you consume carbs, your digestive system uses specialised enzymes to convert them into glucose, a type of simple sugar.

Function of sugar in the body The body uses carbohydrates as fuel to produce energy.

Foods high in carbs are converted by the body into glucose, which can then travel through the bloodstream. For the brain, central nervous system, and red blood cells to operate properly, some glucose is required.

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Answer:

An organelle has different types like the

mitochondrion which has the function to produce energy to break down sugar and produce ATP

lysosome has the function of producing smaller molecules from large molecules. it needs an acid pH.

Chloroplast contains chlorophyll that helps in photosynthesis.

vacuoles helps in storing food and water.

Ribosome helps to link amino acids to form proteins.

other organelles are

nucleus

cytoskeleton

Golgi apparatus

endoplasmic reticulum

plasma membrane

etc...

An micro organism's length in millimeters would be 0.005mm if it were 5 Î14m long.

How wide and long are they?

When comparing two items, width is used to measure the width between the sides of the objects, whereas length measures the total length between the ends of the objects. An object's height is measured from top to bottom.

What factors affect the length?

One can measure length in a variety of quantities, such as centimeters, inches, meters, and so on, in addition to using handspan, foot span, and other techniques. The various length measurement units may be categorized into two groups: non-standard units and standard units

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Answer:

Explanation:

The five main reasons given in the text for conserving endangered species include utilitarian justification, ecological justification, aesthetic justification, moral justification, and cultural justification.

The type of macro that executes when an event attached to a control or object occurs is known as an Event Procedure macro. This type of macro is triggered by a specific event, such as a button click or a change in a text box.

And is designed to perform a particular action in response to that event. An Event Procedure macro is typically used to automate repetitive tasks, simplify complex procedures, or customize the behavior of a form or report. To create an Event Procedure macro, you need to open the object or control's property sheet, select the Event tab, choose the appropriate event from the list, and then specify the macro name or code to be executed. Overall, Event Procedure macros are a powerful tool for improving the efficiency and functionality of your Access database.

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The main differences in coloration between red, brown, and green algae are due to the presence of different pigments that are used for photosynthesis

Red algae, also known as Rhodophyta, are typically red or purple in color. This is due to the presence of pigments called phycoerythrins and phycocyanins, which are used for photosynthesis. These pigments absorb blue and green light, but reflect red light, giving red algae their distinctive coloration. Red algae are found in both freshwater and marine environments, and can grow at depths of up to 200 meters.

Brown algae, also known as Phaeophyta, are typically brown or yellow in color. This is due to the presence of pigments called fucoxanthin and chlorophyll a and c, which are used for photosynthesis. These pigments absorb blue and green light, but reflect yellow and brown light, giving brown algae their distinctive coloration. Brown algae are primarily found in marine environments, and can grow at depths of up to 60 meters.

Green algae, also known as Chlorophyta, are typically green in color. This is due to the presence of chlorophyll a and b, which are used for photosynthesis. These pigments absorb blue and red light, but reflect green light, giving green algae their distinctive coloration. Green algae are found in both freshwater and marine environments, and can grow at depths of up to 200 meters.

In summary, the main differences in coloration between red, brown, and green algae are due to the presence of different pigments that are used for photosynthesis. Red algae reflect red light, brown algae reflect yellow and brown light, and green algae reflect green light.

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its A, i took the test sorry for not anasewring at the right time of year, pardon me

Answer:

See Explanation

Explanation:

When we sweat, we loose moisture in our bodies. Being thirsty and drinking water is a way of replenishing the moisture in our bodies and maintaining homeostasis.

Answer:

Sunlight, water, and carbon dioxide

Explanation:

Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

Answer:

Due to increase of surface area, the nutrients move efficiently inside the cell.

Explanation:

The cells need to have a high amount of surface area as compared to their total volume because with increase of surface area, the nutrients move efficiently inside the cell. A large surface area to volume ratio indicates that the cell can be efficient in moving nutrients and waste materials around using through the process of diffusion but when the volume increases instead of surface area, the efficiency of the cell decreases, and cells won't be able to do its job efficiently.

Vitamin A is a small, lipid-soluble molecule that can act as a hormone. Most likely its receptor is C. Involves a G protein

Once vitamin A binds to its receptor, it induces a conformational change that causes the receptor to activate G proteins, which then activate downstream signaling pathways. This ultimately results in changes in gene expression and physiological processes such as vision and cellular differentiation. Vitamin A receptor is one of the most important retinoid receptors involved in the biological activities of retinoids, including gene expression regulation, growth, and differentiation of various tissues.

The retinoids are a group of lipid-soluble molecules that are derived from vitamin A and are important for normal growth, development, and maintenance of tissues such as the skin and eyes. The role of vitamin A receptor is to act as a transcription factor, meaning it binds to DNA and regulates gene expression, it has been shown to be involved in a variety of processes, including vision, cell differentiation, and immune function.

In summary, Vitamin A is a small, lipid-soluble molecule that can behave as a hormone. It most likely has a G protein-coupled receptor that activates downstream signaling pathways to induce changes in gene expression and physiological processes. So the correct answer is C. Involves a G protein.

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Answer:

carbon monoxide

Explanation:

Carbon monoxide is often released from wildfires.

The air pollutant that gets released by natural wild fires is carbon monoxide. The correct option is D.

Air pollutants are natural and man-made airborne substances that are introduced into the environment in sufficient concentrations to have a discernible effect on air quality.

Large amounts of carbon dioxide, carbon monoxide, black carbon, brown carbon, and ozone precursors are discharged into the air by wildfires. These emissions have such a regional and even global impact on radiation, clouds, and climate.

Thus, the correct option is D.

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Answer:

- Animal cells have centrosomes (or a pair of centrioles), and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.

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Answer:

there would be more food for the foxes so their population would increase

So it's the first one

Answer:

when the ecosystem has an abundant supply of sun and water (ex. coral reefs, rainforests)

Explanation:

Net primary productivity of an ecosystem is high when there is a large number of green plants and photosynthetic algae present along with an enormous amount of sunlight and water.

Net primary productivity may be defined as the amount of matter accumulated by a plant per unit area in a given time. It may also be characterized as the amount of energy that is available to primary consumers i.e. herbivores.

NPP is available for consumers and increases biomass. It may be represented as follows:

NPP = Gross primary productivity (GPP) - Respiration loss.

The highest net primary productivity in terrestrial ecosystems occurs in swamps, marshes, tropical rainforests, etc. While the lowest NPP occurs in desert areas.

Therefore, the Net primary productivity of an ecosystem is high when there is a large number of green plants and photosynthetic algae present along with an enormous amount of sunlight and water.

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