WILL GIVE A BRAINLEST
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The main difference between deserts and steppes is the _____.


vegetation density


annual rainfall


animal population


grass fire frequency

Answer:

When there is a sufficient cortisol level in the body.

Explanation:

Corticotropin-releasing factor (CRF) is a hormone synthesized in the hypothalamus, whose function is the release of adrenocorticotropic hormone (ACTH), also called corticotropin, by the adenohypophysis. The stimuli for the release of CRF converge to the median eminence, leading to their secretion in the pituitary vessels, on the other hand, when the release of cortisol in the organism is high and its concentration is at a significant level, the release of CRF is interrupted.

Answer: D. redwood tree forests

Redwood forests can be significant reservoir for fixing atmospheric carbon dioxide. Through photosynthesis the redwood tree captures the atmospheric carbon and convert it into glucose as an energy reservoir for trees. Also, the soil organic matter of redwood forests is the accumulation of dead plant material, partially decayed or completely decayed plant and animal matter fixes carbon in the form of decomposed matter. This decomposed matter is again absorbed by plants. Hence, maintains the balance of carbon in the ecosystem.

The correct answer is:     [D]:

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                    →   " redwood tree forests " .

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 Note:  Let us consider the other answer choices.

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Choice:  [A]:  "garden flowering plants" ;  is incorrect  — since these are not generally considered to be part of a true or traditional "ecosystem" ; and especially since "garden flowering plants" are, in fact, "flowering plants" —  which means that they are "angiosperms" —  Not  "gymnosperms ".

      →  Rule out:  " Choice:  [A] " .

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Choice:  [B]:  " ferns and liverworts " ; is incorrect — since both  ferns — as well as liverworts — are Not  "gymnosperms ".  

          Liverworts are "bryophytes" {which lack true vascular tissue] ; and ferns are "pterophytes" ["seedless vascular plants"].

      →  Rule out:  " Choice:  [B] " .

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Choice:  [C]: " mosses and horsetails "; is incorrect ;  since both mosses — as well as horsetails — are Not  "gymnosperms ".   Mosses are "bryophytes" (see aforementioned) ; and horsetails are "non-seed bearing plants" that spread vegetatively [underground; by asexual reproduction — and Not by seed .].

      →  Rule out:  " Choice:  [C] " .

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Choice:  [D]: " redwood tree forests "  ;

               — is the only answer choice provided that is a "gymnosperm".    

             Furthermore, the "redwood tree" is a conifer (i.e. "coniferous; or, "cone-bearing" plant} that reproduces through seeds spread by "cone") — and all "conifers" are a type of "gymnosperm."  

            Furthermore, "redwood trees" grow large and tall, and redwood forest communities within an ecosystem; due to there size and presence, are:  "known to be important in maintaining the balance of carbon in an ecosystem."

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 →  As such, the correct answer is:

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 →  Answer choice:  [D]:  " redwood tree forests " .

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Hope this helps!

    Best wishes to you in your academic endeavors

           — and within the "Brainly" community!

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With the help of climate, we can determine which biomes are located in the southern hemisphere.

It is because different biomes needs particular type of climate for their growth and survival. The climate of southern hemisphere is mild due to the presence of more water bodies as compared to land so those plants and animals can survive and grow in this environment which needs mild type of environment and more precipitation so we can conclude that climate is the factor which determines the presence of biomes in southern hemisphere.

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To determine the biomes in the southern hemisphere, look at the latitude and proximity to the equator.

To determine which biomes are located in the southern hemisphere, we can use the concept of latitude. Biomes that are closer to the equator tend to be tropical, while those located farther away from the equator are typically temperate or polar. In the southern hemisphere, we would expect to find biomes such as tropical rainforests, savannas, and deserts closer to the equator, while temperate forests and tundras would be located farther south.

Glycolysis, the first step in both aerobic and anaerobic respiration, happens in the cytoplasm of the cell. It involves the breakdown of glucose into two molecules of pyruvate.

Glycolysis is a part of cellular respiration that occurs in the cytoplasm of the cell. This process involves the breakdown of glucose, a six-carbon sugar molecule, into two three-carbon molecules of pyruvate. It is an anaerobic process, which means it can occur in the absence of oxygen. An important thing to remember is that glycolysis is the first stage in both aerobic and anaerobic respiration.

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The correct answer is option d, that is, glaciers and icecaps.  

Though the amount of water present in the glaciers and the ice caps is a small ratio in comparison to the total water found in and on the Earth, it demonstrates a huge ratio of the world's entire freshwater.  

On the basis of the data, about 1.7 percent of all the water found on Earth is locked up in snow and ice, however, the majority of the entire freshwater on the planet, that is, about 68 percent is captivated in glaciers and ice caps.  

Final answer:

Without the middle groin, a beach would have more uniform sand distribution but could also experience increased erosion in the particular area the groin would have protected. This can lead to broader implications for the local ecosystem and beachfront properties.

Explanation:

If the middle groin at site 1 were not constructed, the beach would likely experience more uniform sediment distribution, as the presence of groins typically interrupts the natural flow of sediment along the coastline. Without the middle groin, the longshore drift would more evenly spread the sand along the beach between the two remaining groins. However, the immediate area where the middle groin would have been could potentially suffer from increased erosion over time due to the lack of a physical barrier to protect that specific part of the shore. The beach may adapt naturally or could be more susceptible to damage from forces such as strong currents or storm impacts, potentially affecting local ecosystems and nearby beachfront properties, as per the Turneffe Atoll Trust 2008 study. This has broad implications for coastal erosion, which scientists and engineers are studying to better construct beach protections such as groins and breakwaters.

Final answer:

Schizophrenia is strongly suspected to be related to neurons sensitive to dopamine, due to the evidence that variations in dopamine levels and activity can significantly affect schizophrenia symptoms. While serotonin also plays a role in the condition, dopamine is considered the primary neurotransmitter involved.

Explanation:

Schizophrenia is strongly suspected to be related to neurons sensitive to dopamine. The dopamine hypothesis of schizophrenia has been a significant focus due to the effects that dopamine levels have on the condition. Drugs that increase dopamine levels can induce schizophrenia-like symptoms, whereas medications that block dopamine activity can reduce these symptoms.

Furthermore, an overabundance of dopamine in the limbic system may be responsible for symptoms such as hallucinations and delusions, while low levels of dopamine in the prefrontal cortex might contribute to negative symptoms like avolition and anhedonia.

Although serotonin has also received attention in relation to schizophrenia, and newer antipsychotic medications work by blocking serotonin receptors, the role of serotonin is considered alongside dopamine, rather than as the primary neurotransmitter involved.

The contractile units of muscles from Z disc to Z disc are sarcomeres, which are the basic functional units of striated muscle tissue. Option B is correct .

A sarcomere is the basic functional unit of striated muscle tissue. It is the segment between two neighboring Z discs and includes an entire A band and two halves of an I band on either side of the A band.

Sarcomeres consist of an A band and portions of I bands and are the repeating units of myofibrils. As sarcomeres contract, the muscle cell shortens, causing muscle contraction.

Myofibrils, which are long strands inside muscle cells, are composed of repeating sarcomeres. As these sarcomeres contract, the myofibril and hence the muscle cell shortens, leading to muscle contraction.

Complete question :

The actual contractile units of muscles extend from z disc to z disc. they are ________.

A. sarcoplasmic reticulum

B. sarcomeres

C. thick filaments

D. myofibrils

The necessary steps a scientist do research are before forming a hypothesis, after generating an idea from an observation, when designing an experiment to test a hypothesis. Thus, options A, C, D are correct.

When a hypothesis states something with expected outcome of a  scientific study and are genuine called as research hypothesis.  

These  have three attributes  such as specificity, testability and falsifiability.

First of all a research hypothesis must be specific to a topic, secondly it must be testable means that it must be able to collect observable data from scientific study.

Thirdly, hypothesis must be falsifiable, means some identifiable way to test the hypothesis is true or false.

For a good research hypothesis a background research should be done.

Other methodology should be implemented after generating idea from observation, a suitable scientific method should be implemented to test the hypothesis accurately.

Thus, options A, C, D are correct.

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Answer: Sun

Explanation: Almost all the energy that is used by the organism on Earth is derived from the Sun. It is source of energy, power and heat which is used by the organism for various purposes.

The sun provides energy and sunlight for the process known as photosynthesis. This process provides food to the organism living in the ecosystem. Without this process there would be no energy source available to the organism.

Final answer:

Fellowship training allows physicians to further specialize in a specific field of medicine through post-graduate training programs.

Explanation:

Yes, that statement is true.

Fellowship training is a post-graduate medical training program that allows physicians to further specialize in a specific field of medicine. It offers additional training and experience beyond what is covered in medical school and residency programs. During fellowship training, physicians gain advanced knowledge and skills specific to their chosen field, such as cardiology or neurology.

For example, after completing a residency program in internal medicine, a physician may choose to pursue a fellowship in cardiology. This would provide them with specialized training in diagnosing and treating cardiovascular diseases.

Lawmakers would need to consult with scientists and mechanics before making these laws because they want to know that these laws significantly reduce pollution and have a reasonable cost from scientists and mechanics. Thus, the correct option for this question is B.

The impacts of emissions from vehicles are as follows:

According to the context of this question, before making and implementing any law in the country, it must be required for lawmakers to discuss them with authorized agencies. So, here lawmakers have to consult with scientists and mechanics before making these laws so the laws reduce pollution and have a reasonable cost.

Therefore, the correct option for this question is B.

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Hyaluronidase and collagenase are enzymes produced by bacteria that degrade components of connective tissue, allowing the pathogens to spread through the host’s body.

Hyaluronidase and collagenase are enzymes produced by bacteria that allow the pathogens to degrade components of connective tissue and spread through the host's body.

Hyaluronidase degrades hyaluronic acid, which acts as an intercellular cement in connective tissue, while collagenase digests collagen, the dominant protein in connective tissue.

By breaking down these proteins, hyaluronidase and collagenase help the bacteria penetrate and spread through the host tissue.

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The Momentum earphones by X-1 are best classified as a product designed for a niche market, particularly catering to athletes and sports enthusiasts due to their durability and weather-resistant features.

X-1's waterproof, sweatproof, weatherproof earphones like the Momentum, which were developed for athletes and sports enthusiasts, can be best classified as a product specifically designed for a niche market. These earphones cater to the needs of individuals who require durable and reliable headphones that can withstand rigorous physical activity and adverse weather conditions. This type of headphone is a technological innovation that merges sporting goods with personal electronics, making the Momentum an exemplary product within the sports technology sector.

The right answer is The pressure in veins is lower than in arteries, causing less seepage of blood.

The arteries are the vessels located at the exit of the heart towards the organs. When the heart contracts like a pump to expel the blood to the arteries, the pressure is very strong. This is called systolic pressure. To cope with this pressure, the arteries have a thick and elastic wall, to be able to stretch without breaking. The arteries have an average diameter of 2.5 centimeters, against less than 2 mm for arterioles.

Unlike the arteries, the veins are subjected to a weak pressure, since the blood starts from the organs and not from the heart. The walls of the veins are therefore thin and fairly rigid because they have little resistance to provide against the pressure. The diameter of the veins and venules is rather small (smaller than arteries) and hardly varies. Veins and venules contain about 75% of the blood. During a cut, the blood of the veins gradually trickles.

So from these explanations, we can conclude that the propositions B; C and D are false, it is rather their opposite that is right.

Veins have lower pressure than arteries in order to move blood quickly and efficiently, so the answer is A.

laws are your answer.

For example, "The law of gravity" says that whatever has more mass than air would be pushed downward, while those with less would be pushed upwards by the air.

Theory's on the other hand, are yet to be proven, but are generally accepted (such as the Theory of Evolution)

hope this helps

Technology has had a significant impact on quality control by improving feedback mechanisms, reducing the risk of imperfect information, and enhancing printing processes. It has increased societal well-being across different sectors such as agriculture and healthcare, and provided competitive advantages to businesses.

Technology has revolutionized the field of quality control in various ways. With electronic peer reviews, the process of giving and receiving feedback has become more efficient, reducing the risk of imperfect information and its potential impacts on the price, quantity, and quality of products and services. Furthermore, in printing, the development of computerized typesetting and printing has streamlined production and increased accuracy, distancing the industry from older photographic methods. The innovation in technology, like those seen with the green revolution in agriculture or advances in medical technology, has not only enhanced production but also societal well-being. Lastly, technologies are being developed and reused across different products, which can provide significant competitive advantages to companies over time.

Through these examples, it is clear that technology has had profound effects in multiple sectors, from agriculture to healthcare, communications to manufacturing, impacting the built-in quality control systems of numerous industries. It has not only improved efficiency and accuracy but has also changed societal dynamics such as urbanization and employment.

Answer:

The peripheral nervous system affects the nerves that transmit information between brain and  various organs of the body such as skin muscle, joints and connects central nervous system to whole body while the central nervous system is associated with the brain and spinal cord as it control the function associated with mind.

We have that the statement on peripheral nervous system  in a complete form is:

The peripheral nervous system affects ____the nerves that transmit information between brain and  various organs______ while the central nervous system is associated with _______brain and spinal cord ________.

Generally, The  peripheral nervous system influences the nerves that transmit facts between brain and a number organs of the physique such as pores and joints and connects central anxious machine to total physique

The central worried device is related with the intelligence and spinal twine as it manage the feature related with mind.

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The correct answer is option A

The primates constitutes of an order within the placental mammals. This clade includes apes, large monkeys and non-human primates such as human beings.

All the primates have large brain relative to the body size. A capuchin monkey's brain will be around three times larger than that of the other animals of the same size. Humans have the largest brain size as compared to that of the other animals.

Lacerate leaves are determined in the opium poppy by two genes, with a dominant allele at either or both loci. The correct option is A.

To determine how lacerate leaves are inherited in the opium poppy, let's analyze the genetic cross and the resulting phenotypic ratios.

Given Information

Analysis

First, we need to identify the phenotypic ratio of the F2 generation to infer the genetic mechanism behind the lacerate leaves.

Total number of F2 plants = 249 (lacerate) + 16 (normal) = 265

Phenotypic Ratio

249 lacerate : 16 normal

249 / 16 ≈ 15.56 : 1

This ratio is close to 15:1, which is a well-known phenotypic ratio in dihybrid crosses involving two genes with a dominant allele at either or both loci contributing to the phenotype.

Therefore, the 15:1 ratio can be explained as follows:

1 aabb (recessive alleles at both loci resulting in normal leaves)

This gives us a 15 (lacerate) : 1 (normal) ratio.

Conclusion

The data and the phenotypic ratio fit the scenario of two genes, with a dominant allele at either or both loci contributing to the lacerate leaves phenotype.

Therefore, the correct answer is:

A. two genes, with a dominant allele at either or both loci

The complete question is:

A homozygous variety of opium poppy (papaver somniferum laciniatum) with lacerate leaves was crossed with another homozygous variety with normal leaves. all the f1 had lacerate leaves (jagged-edged leaves). two f1 plants were crossed to produce the f2. of the f2, 249 had lacerate leaves and 16 had normal leaves.

How are lacerate leaves determined in the opium poppy?

A. two genes, with a dominant allele at either or both loci

B. two genes, where one allele at a single locus is recessive lethal

C. one gene, with codominant alleles at a single locus

D. two genes, with a dominant allele at both loci