A decrease in susceptibility to a drug after continued use of the drug is known as:

Answer:

The correct answer would be option A.

Explanation:

The blood returned to the heart in the right atrium from different parts of the body is deoxygenated, which is transferred to the right ventricle to be pumped to the lungs by the pulmonary artery for removal of the carbon dioxide and oxygenate again the blood.

The right ventricle chamber of the heart pumps back blood to the lungs to take up oxygen. The left part of the heart gets the oxygen rich blood from the lungs and pumps it to all parts of the body.

Thus, the correct answer would be option A.

Answer:

A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block (base pair) to a large segment of a chromosome that includes multiple genes.

Explanation:

Answer:mutations are rare

most forms of cancer are caused by somatic mutations

Explanation:

Answer:

Crossing over is the process in which the homologus chromosomes exchange their chromatids and exchange the genetic material and produce variation

it is the process  that make meiotic cells genetically different and occurs during prophase I, but not during prophase II

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Explanation:

Answer:

The correct answer is crossing over.

Explanation:

Crossing over maintains genetic diversity within a population of an organism, allows the various genetic combination to be transferred from parents to their offspring.  

Crossing over of chromatids pair occurs during prophase-I, it is the very first phase of meiosis-1. In this phase, the 3rd stage is pachytene in which genetic recombination occurs because of the formation of recombinant nodules.

The first phase of meiosis II is prophase II in which the nuclear envelope breaks and the formation of the spindle apparatus occurs.

Thus, the correct answer is crossing over.

Answer:

subsoil

Explanation:

THe B horizon is what we call the layer of soild that is directly after the A-horizon, or normal soil when we dig up, the B horizon is also called the sub soil, which comes from the root sub- which means directly below, in its name expresses the reality of its meaning whihc is the soil that is directly below the surface soil.

Answer:

C. From steam produced by the Earth

Explanation:

Geothermal energy

This energy is produced , from with in the surface of the earth .

Water or the steam are the carrier of this energy , which comes out from the earth's crust , and this energy can be used for generating electricity .

Hence , this energy is very useful and beneficial for people on Earth .

Hence , the correct answer fro the given statement of the question is ( c ) .

From steam produced by the Earth the heat for geothermal energy come from. The correct option is C.

Thus, The production of complex molecules from simpler ones is a component of synthetic processes, commonly referred to as anabolic reactions.

These processes are essential for the development, maintenance, and repair of bodily tissues and structures when seen in the context of the body.

Smaller molecules are joined during synthesis reactions to create larger, more complex ones. For instance, amino acids are used to make proteins, nucleotides are used to make nucleic acids, and simple sugars are used to make polysaccharides.

Thus, From steam produced by the Earth the heat for geothermal energy come from. The correct option is C.

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Answer:

A

Explanation:

Just took my test

Groundwater becomes polluted when pollutants mixed with water pass through permeable layers above the aquifer..

Groundwater refers to the water that exists beneath the earth's surface in underground streams and aquifers.

Water pollution, on the other hand, is the release of toxic substances called pollutants into water via natural or anthropogenic sources.

Therefore, it can be said that groundwater becomes polluted when pollutants mixed with water pass through permeable layers above the aquifer.

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Answer:

The double helix shaped sugar phosphate backbone

Answer:

D-Condition a drug experiment which will harm a lab rats

Explanation:

think about the question and it will make sence,poor rats :(

♡

Answer:D)-Condition a drug experiment which will harm a lab rats

Answer:

your answer is A. it converts glucose into pyruvate

Explanation:

because this called glycolysis

Answer:

A. It converts glucose into pyruvate.

C. It occurs in the cytoplasm of the cell.

Explanation:

Glycolysis is a process that can be defined as a metabolic pathway in which one molecule of glucose is broken down into two molecules of pyruvic acid. It occurs in the cytoplasm of the cell of any living being, be it anaerobic or aerobic. The process is not seen only in viruses.

Glycolysis is a process that involves ten enzymatic reactions and results in the formation of pyruvic acid from glucose. For the process to occur, it is necessary that the glucose molecule is initially activated by the addition of phosphates, which come from two molecules of ATP. Despite the use of ATP, the process of glycolysis is advantageous, since a total of four molecules of ATP are produced at the end of the reactions. Therefore, the net balance of glycolysis is 2 ATPs.

D. Complementary strands of mRNA

In transcription, RNA is made from RNA.

The final product of DNA transcription is complementary strands of mRNA.

Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA. Other segments of DNA are copied into RNA molecules called non-coding RNAs.

During transcription, a piece of DNA that codes for a specific gene is copied into messenger RNA (mRNA) in the nucleus of the cell. The mRNA then carries the genetic information from the DNA to the cytoplasm, where translation occurs.

The purpose of transcription is to make RNA copies of individual genes that the cell can use in the biochemistry. The purpose of translation is to synthesize proteins, which are used for millions of cellular functions.

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Answer: Option (2)

Explanation: The most favorable time for Sarah's family to go for the trip is in the month of March, that falls under the spring season. During this time, there occurs no hurricanes.

Soon after the end of the spring season, summer begins i.e from June, the typical weather conditions gradually builds up that favors the formation and occurrence of hurricanes. Hurricanes are very frequent from June to December, that is by the end of the autumn, hurricane again starts disappearing. Most of the severe hurricanes occurs in the month of September.

Thus the correct answer is option (2).

Answer:

A earthquake data is anlayzed to determine if a tsunami is likely and if so warnings are sent out

Explanation:

They need to know where it is and where it going tostike also theyy warn the people that its going to stike so they have enough time to evacuate

Answer:

Option A, Earthquake data is analyzed to determine if a tsunami is likely, and if so, warnings are sent out.

Explanation:

Warnings for Tsunami can be detected by seismograph (a device that measures earthquake), which is essential for observing any kind of movement of the tectonic plates below the surface of ocean. Pre-determination of any such event helps in forecasting the calamity much before its onset and allows the concerned department of any city to send warning messages to the resident of the city , so that they can move to safer areas.

Hence, option A is correct

Answer:

Gametes

Explanation:

Gametes are an organism's reproductive cells. They are also referred to as sex cells.

NOT: diploid cells, somatic cells or zygotes

Eggs and sperm are examples of gametes.

Gamete reproduction begins with sperm and egg cells, which are produced through a process called meiosis. These cells are referred to as haploids because they contain half of the number of chromosomes as the parent.

Reproduction is a biological process by which an organism reproduces an offspring that is biologically similar to the organism. Reproduction enables and ensures the continuity of species, generation after generation. It is the main feature of life on earth.

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Answer: Poly-metallic nodules

Explanation: Poly-metallic nodules are generally considered to the manganese nodules, formed due to the accumulation of rocks and mineral aggregates at the seafloor, adjacent to the underwater volcanoes.

This nodules appears in concentric layers, i.e these are the layers of manganese hydroxide and iron hydroxide. They are commonly found at the sea floor and have economical importance.

Answer:

I believe it's B.

Explanation:

Hope my answer has helped you!

Answer:

Phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment. Essentially its physical characteristics. According to natural selection, some characteristics are more likely to survive and thus pass on to children of a generation. Therefore, over time said characteristics such as the ability for an organism to blend in with its environment get passed along and become more prominent within a population ultimately making the appearance (or phenotype) of the population more synonymous with the characteristics "chosen" by natural selection.    

Explanation:

Final answer:

Increasing the amount of saturated fat in the diet can lead to an increased risk of cardiovascular disease, while a diet high in unsaturated fats can reduce this risk.

Explanation:

A person who increases the amount of saturated fat in their diet is likely to experience negative health effects, particularly an increased risk of cardiovascular disease. Saturated fats are found in foods such as butter, cheese, lard, and fatty meats. Consuming these foods in excess can lead to unhealthy weight gain and elevated lipid levels in the blood, which can contribute to the development of heart disease.

On the other hand, a diet high in unsaturated fats, particularly omega-3 fatty acids found in cold-water fish like salmon, is believed to reduce the risk of heart disease. Therefore, it is important to balance the consumption of saturated fats with healthier dietary choices to maintain good cardiovascular health.

Answer: Option D.

Explanation:

Pesticides are the chemical substances which are use to to control pests in agriculture.

Overuse of Pesticides is a raising concern for human health. Pesticides contains several lethal or toxic chemicals which are more heat stable and  water soluble. Exposure to pesticide can cause several health issues such as neurological health effects, cancer and reduces efficiency of immune system.

Hence, the correct option is D.

Final answer:

Current research in food safety and sanitation includes studies on temperature's effect on bacterial growth and the efficacy of innovative sanitation techniques. These studies are crucial for enhancing food management and reducing the prevalence of foodborne illnesses.

Explanation:

The student seeks to learn about ongoing research projects on food safety and sanitation. Two examples of such research include a study on the impact of temperature on the growth of bacteria in food, and another exploring innovative sanitizing techniques to prevent foodborne illnesses. In the first project, researchers might ask how varying refrigeration temperatures affect bacterial growth in perishable foods. The second project could investigate whether ultraviolet light or other non-traditional methods are effective at reducing pathogens on food surfaces. Understanding these processes is vital because it helps improve food management practices both commercially and domestically, potentially reducing the incidence of foodborne diseases.

Implementing food safety practices, such as proper hand washing, cooking at recommended temperatures, and avoiding cross-contamination, are essential for preventing foodborne diseases at home. Comprehensive research in food safety underpins these recommendations, providing evidence-based guidelines for the public and the food industry to follow. By exploring new and improved ways to maintain food safety, researchers contribute to the health and well-being of society, influencing policies and individual behaviors that support a safer food supply chain.

Reflecting on these findings illustrates the importance of scientific inquiries in shaping practical safety measures. Further research might delve into alternative preserving methods or the effectiveness of food safety education programs among different demographics. The student may then discuss the implications of these findings for everyday food handling and policy making, shaping a well-informed thesis on food safety strategies.

Answer:

it transmits threw the neurons

your answer would be D

the answer is d. it's a stone shaped by the erosive action of windblown sand.

Answer: D. an invasive, fast-growing vine native to Japan

Explanation:

Kudzu is the invasive vine native of Japan. It is fast growing in nature. It reproduce and spread by the mode of asexual reproduction. Also conduct the sexual mode or reproduction in which the pollination is entirely dependent upon the pollinators. In Japan Kudzu thrives in mountainous regions.

It was introduced to United States. In US it is used as a livestock feed, erosion control and fertilizer.

Answer:

A

Explanation:

Answer: A. Diseases will increase.

Explanation:

The carrying capacity can be define as the maximum number of the population of species that an ecosystem can support in terms of availability of resources. When the population of the species exceeds the carrying capacity, the population of the species starts declining.

When the human population met the carrying capacity, the diseases will increase as the transfer of pathogen will become easy and the resources to cure the population will be limited.  

Answer:

D

Explanation:

All of the other examples are positive

The negative impact of technology is climate change. The correct option is D.

Technology is the application of scientific knowledge to the practical goals of human life, or, as it is sometimes referred to, to the modification and manipulation of the human environment.

There can be many negative impact of technology, some are:

Thus, the correct option is D.

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Answer:

germline mutation

Explanation:

It is germ line mutation which can be passed on from one generation to another that means from parents to off springs. The term germ relates to the one which is capable of germination i.e. reproduction.

There are two types of cells in our body (1) somatic cells (2) germ cells.

Germ cells are the cells which are produced in the primary sex organs like gonads.  Since gonads are responsible for producing gametes (ovum and sperms) which are capable of reproducing an entire organism after fertilization, they are regarded as germ cells. Somatic cells on the other hand are not responsible for fertilization. So, if a mutation occurs in germ cells which is known as germline mutation, it will pass on to the off spring while a mutation in somatic cells will be restricted to the individual without being passed on to the next generation.

Answer:

The correct answer option is A. produce ATP.

Explanation:

Carbohydrates are important in the body because they contribute to the body's ability to produce ATP.

When a person eats food, that food is digested by breaking down the carbohydrates to in turn produce an energy rich component called ATP (adenosine triphosphate).

The carbohydrates are broken down by certain enzymes in the small intestine in the form of glucose which then yields ATP to drive the cell.

The seed plants are survivors.

Answer:

Bioshpere and atmosphere interaction.

Explanation:

Plants are living organisms that are part of the biosphere. These plants obtain their carbon from the atmosphere, absorbed through the leaves. The carbon that they absorbed is used to produce their food through the process called photosynthesis, which also needs water and sunlight for it to occur.

Although plants are rooted on the ground, it is still part of the biosphere because the biosphere encompasses all living things.

D. All of the above

Precambrian time incorporates Earth's history from birth up to 590 million years back. That is, the Precambrian traverses 90% of Earth's presence. Fossilized microscopic organisms and blue-green growth demonstrate that crude life existed in any event 3,500 million years prior, and potentially prior.

However, it took another 2,100 million years for eukaryotic cells (plant and creature cells) to show up. These single-celled animals (protozoa) commanded the seas. Multi-cell creatures (spineless creatures) didn't advance until exceptionally late in Precambrian time, around 700 million years prior or 2,800 million years after life initially started on Earth.  

The Precambrian Era saw the emergence of the first prokaryotic cells and eukaryotic cells, as well as the development of photosynthesis. Hence, 'all of the above' occurred during this period.

The Precambrian Era led to significant milestones in the biological history of life on Earth including the appearance of the first prokaryotic cells, the first eukaryotic cells, and the development of photosynthesis.

The Precambrian Era was a time when the Earth was being shaped by volcanic activities and cooling effects, which led to the formation of simple life forms. First prokaryotic cells emerged, which are simple, single-celled organisms that lack nuclei and distinct organelles. Later, more complex eukaryotic cells developed, which have a true nucleus and various organelles. Additionally, during this era, living organisms developed the ability to undergo photosynthesis, which is the process where green plants and a few organisms convert light energy, usually from the sun, into chemical energy.

Therefore, the answer to your question, 'Which of the following happened during the Precambrian Era?' is all of the above.

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