Can the respiratory system function alone without the help of the circulatory system

Answer:

there are four trophic levels.

Explanation:

Answer:

its A

Explanation:

Answer:

option 4

Explanation:

there will be less emission of gasses like methane and carbon dioxide from biomass

Answer:

Here's how many different  cells are in a carrot!

Explanation:

A carrot is a diploid species, and has nine relatively short, uniform-length chromosomes. (hope this helps!)

Irregular variation is composed of both cyclical and residual variations. Cyclical variations refer to changes that follow a certain pattern, while residual variations are changes that cannot be explained by any specific cause or pattern

Irregular variation is a term used in economics to describe changes in a time series that cannot be predicted by any known cause or pattern. It is composed of cyclical and residual variations, both of which are important in understanding economic trends.

Cyclical variations refer to changes that occur in a specific pattern. They are a result of changes in the business cycle, which can be measured in terms of changes in GDP or employment levels. For example, during an economic expansion, businesses are likely to invest more, leading to an increase in output and employment.

During a recession, the opposite is true, leading to a decrease in output and employment.

Residual variations, on the other hand, refer to changes that cannot be explained by any specific cause or pattern. They are often the result of random events or errors in measurement.

For example, changes in weather patterns or unexpected changes in consumer behavior can cause residual variations in economic data.

Irregular variation is important in economic analysis because it can provide insights into the underlying causes of economic trends. By separating cyclical and residual variations, economists can better understand the dynamics of the business cycle and make more accurate predictions about future economic trends.

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Explanation:

At present, 118 elements are known to us. All these have different properties. Out of these 118, only 94 are naturally occurring.

Hope it's help...

Answer:

The Modern Periodic Table. The modern periodic table includes the 92 naturally occurring elements found in earth's crust and ocean and two elements, Technetium (Tc) and Promethium (Pm), which are created as byproducts of nuclear reactors.

Explanation:

Answer:

Population dependant factors

Explanation:

Answer:

population-dependent factors

Explanation:

The type of limiting factors the seasonal drought in the Serengeti Plains which are affected by the seasonal drought is population-density factors.

The drought affects the population who face survival with a lack of water, and depending on the number of people within the population, it raises questions whether the scarce availability of water is enough.

Answer: However, most non-canonical genetic codes are inferred from DNA sequence alone, or occasionally DNA sequences and corresponding tRNAs. Because the code governs the translation of nucleotide to amino acid sequences, a code can in principle only be confirmed when both the gene and protein sequences are known

Explanation :DNA is considered a universal genetic code because every known living organism has genes made of DNA. ... Every living organism uses that same system. Basically, every three pieces of DNA becomes one amino acid.

DNA is able to mutate and change the structure and/or function of an organism. The correct option is B.

A polymer made of two polynucleotide chains that coil around one another to form a double helix is called deoxyribonucleic acid.

All known organisms and many viruses have genetic information in the polymer that is necessary for their development, operation, growth, and reproduction. Nucleic acids include DNA and ribonucleic acid.

All of the living things on Earth share the same genetic code, with a few small exceptions.

As a result, the 20 amino acids that make up your cells' codons are the same ones used by bacteria living in hydrothermal vents beneath the Pacific Ocean.

An organism's structure and/or function can change as a result of DNA mutation.

Thus, the correct option is B.

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Your question seems incomplete, the missing options are:

O The order of nucleotides in all plants, animals, bacteria and fungi, is the same.

O DNA is able to mutate and change the structure and/or function of an organism.

O Genetic codons in all organisms code for the same 20 amino acids.

O All organism replicate DNA by pairing of A-T and C-G.

Answer:

6 males.

Explanation:

They're the boxes that are all filled up.

Answer:

C. Agricultural productivity has not been measured since 1948.

Answer:

A

Explanation:

it has increased 175 percent since then

The following is not a function of meiosis : b.)create genetic variability. Hence option c is correct.

Type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells is called meiosis. This process produces egg and sperm cells for sexual reproduction.

Growth and division of cells occurs by mitosis and differentiation for specific cell types whereas genetic variations arise from mutations in which genetic material is rearranged as a cell gets ready to divide. Genetic variations that alter gene activity or protein function introduce different traits in an organism.

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The correct answer to this question is d. Inner cell mass. The inner cell mass is not an extra-embryonic membrane, but rather a group of cells within the blastocyst that will eventually develop into the embryo itself.

The three extra-embryonic membranes are the amnion, chorion, and allantois. The amnion is the innermost membrane that surrounds the developing embryo and fills it with fluid, creating the amniotic sac. This sac helps to protect and cushion the developing fetus.

The chorion is the outermost extra-embryonic membrane that surrounds the amnion and the embryo. It plays a role in the exchange of gases between the developing fetus and the mother.

The allantois is a membrane that extends from the developing embryo's hindgut and helps to form the umbilical cord. It also plays a role in the exchange of gases and waste products between the fetus and the mother.

Overall, understanding the different types and functions of embryonic membranes is important in understanding the development and growth of the fetus during pregnancy.

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Option d is correct. Inner cell mass is not an extra-embryonic membrane. There is no extra-embryonic membrane in the inner cell mass.

The embryo develops from a collection of cells called a blastocyst during the early stages of embryonic development. As the inner cell mass develops, new embryonic tissues and structures emerge.

The extra-embryonic membrane known as the chorion surrounds and shields the embryo. It is essential for the exchange of gases between the mother's blood supply and the developing embryo.

The amnion is a different extra-embryonic membrane that creates the amniotic sac, a fluid-filled sac that surrounds and supports the growing embryo. It offers mechanical defense and aids in preserving a stable environment for the developing embryo.

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The characteristic that describes the troposphere is that it has the highest air pressure. The correct option is B.

The lowest part of the atmosphere on Earth is called the troposphere. The troposphere contains the majority of the atmosphere's mass (about 75–80%).

The troposphere is where the majority of clouds are situated, and it is where practically all weather takes place.

About 85 to 90% of the mass of the Earth's atmosphere is found in the troposphere, which is the first layer above the planet's surface. It is characterised by a temperature that drops as altitude rises.

Thus, the correct option is B.

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Answer: has the highest air pressure

Explanation:

Answer:

The sugar and phosphate group make up the backbone of the DNA double helix, while the bases are located in the middle.

Explanation:

Answer:

Mechanisms are activated where it is sought to lower the amount of free protons in the blood, that is, to reduce acidity, these mechanisms work between two large systems, the receptor system, the respiratory system and the renal system.

Explanation:

When a metabolic acidosis is entered, either by a food, or by a disease or even an intense physical activity, the lungs seek to generate hyperventilation, to increase the concentrations of oxygen in plasma and absolutely decrease the carbon dioxide concentration, thus not the blood becomes even more acidic.

On the other hand, the digestive system together with the sensory system, will warn this proprioception of the acidity of the plasma and will promote the dilution of these acids with a solvent, which is water, promoting the sensation of thirst.

Finally, the kidneys will seek to retain all the alkaline solutes to neutralize the physiological internal pH, and will release through the urine and the channels of acidic compounds, the products or acid metabolites to the external environment, that is, acid urine excretion.

According to the law of acceleration, an object's acceleration increases as its mass decreases while its force remains constant.

Newton's law explains how the relationship between the force, mass, and acceleration works.

Mass times acceleration equals force. The mass is inversely proportional to the acceleration, according to the equation.

According to the second law, the mass of the item and the net force acting on it both affect how quickly an object accelerates. An object's acceleration is directly proportional to the net force applied on it and inversely proportional to its mass.

Therefore, According to the law of acceleration, an object's acceleration increases as its mass decreases while its force remains constant.

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The complete question is :

A: Increasing an object's mass decreases the amount of force required to move it

B: Decreasing the mass of an object increases its acceleration while force is constant

C: Increasing the force applied to an object does not change its acceleration while mass is constant

D: Decreasing the force applied to an object increases its acceleration while mass is constant

Answer:

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Answer:

False

Explanation:

Before a child is born, their nerve cells proliferate. Before birth, twice as many neurons is produced by the unborn child's brain. This can be considered a safety margin when a newborn is making their arrival to the world.

Excess neurons ⇒ Shed into Utero

All of these choices are correct. Platelets are are also known as thrombocytes. They are actually fragments of cells. They play a role in preventing blood loss. And they can become sticky when exposed to connective tissue.

Platelets are tiny blood cells that form clots to stop bleeding. If one of your blood vessels gets damaged, it sends out signals to the platelets. The platelets then rush to the site of damage and form a clot to fix the damage.

They are made in bone marrow  along with white blood cells and red blood cells. The disease associated with platelets are

1) thrombocytipenia

2) platelet dysfunction

3) essential thrombocythemia

4) secondary thrombocytosis

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Answer:

During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.

Answer:

Transcription factors

Explanation:

This is because Eukaryotic gene expression is regulated by transcription factors and RNA processing, which occur in the nucleus, and during protein translation, in the cytoplasm.

Transcription in eukaryotic cells is controlled by proteins . These proteins then bind to some specific regulatory sequences and try to control the activity of RNA polymerase. The Gene expression is regulate by transcriptional regulatory proteins . Also ,the packaging of DNA into chromatin and methylatiin indicate levels of complexity to the control of eukaryotic gene expression.

Answer:

Fermentation is a chemical process that occurs in the cytoplasm since it is anaerobic, that is, with the absence of oxygen.

Explanation:

This anaerobic process is due to the consumption of carbohydrates in the absence of oxygen compared to intense muscular demands such as high-performance physical activity, that is why the obtaining of energy is high, since the purpose is not to anabolize but to catalyze hydrates in order to obtain the energy currency that is ATP and thus produce the contraction of the muscular sarcomero by the union of myosin with actin.

As a Pennsylvania farmer, I would be willing to try various approaches to help reduce fertilizer runoff into the Chesapeake Bay.

Various approaches include implementing Best Management Practices (BMPs) like precision agriculture, cover cropping, and buffer strips. I would also consider developing a nutrient management plan, adopting conservation tillage practices, participating in government incentive programs, and collaborating with other stakeholders. These actions aim to optimize nutrient usage, prevent soil erosion, and protect water quality in the Chesapeake Bay.

These practices help to maintain soil structure and reduce erosion, which can prevent nutrient-rich topsoil from being washed away by rainfall or irrigation. Cover cropping and buffer strips can help reduce soil erosion and nutrient runoff by providing ground cover and filtering runoff water.

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Answer:  Carbon is right

Explanation:

During photosynthesis carbon dioxide is pulled from the atmosphere and then captured into the tree's molecules and somehow it make the whole tree heavier.

Answer:

In these experiments the control group is compared with the comparison group.

The control group will sometime be in the presence of carbon dioxide, and will be controlled, where the analyst or researcher will take an expert position and then will compare it evolutionarily with the comparison group that the ideal would be that there is not ever a carbon dioxide

Explanation:

If we have two poison ivy research groups that are representative of the poison ivy that the researchers are looking to investigate the results will have much better credibility and will be more reliable.

On the other hand, the comparison of the two groups makes it possible to rigorously analyze whether or not poison ivy grows in the presence of this gas.