Infection by yersinia pestis can result in a characteristic lesion that is called: A. oozing abscesses in the intestinal wall B. a chancroid C. a soft chancre D. petechiae E. a bubo

Bioaccumulation is the total accumulation of certain chemicals/contaminants in an organism, coming from diverse sources such as water, air, and diet. Therefore the case of mercury occurs when mercury is accumulated in an organism, for example, fish. The most common pathway for this to happen is through the food chain, nonetheless can occur through abiotic means, an example is in fish, where methylmercury is acquired through the gills.

When methylmercury is absorbed through the gastrointestinal tract & enters the bloodstream and goes rapidly to other parts of the body.

Mercury is a persistent substance, which can bioaccumulate, in living organisms, inflicting increasing levels of harm on higher-order species such as predatory fish and fish-eating birds and mammals through a process known as "biomagnification"

The release of processed mercury can lead to a progressive increase in the amount of atmospheric mercury, which enters the atmospheric-soil-water distribution cycles where it can remain in circulation for years. Mercury poisoning is the result of exposure to mercury or mercury compounds resulting in various toxic effects depending on its chemical form and route of exposure.

The major route of human exposure to methylmercury (MeHg) is largely through eating contaminated fish, seafood, and wildlife that have been exposed to mercury through the ingestion of contaminated lower organisms.

King mackerel, marlin, orange roughy, shark, swordfish, tilefish, ahi tuna, and all contain high levels of mercury.

Human activity is the main cause of mercury release, especially coal-fired power stations, residential coal burning for heating and cooking, industrial processes, waste incinerators, and as a result of mining for mercury, gold, and other metals.

Reducing consumption of raw materials and products generating mercury releases

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What Is DNA's Role in Inheritance? DNA is the genetic information used to make proteins, and it contains the hereditary traits of organisms. ... You are who you are because of your DNA; the smallest change to it would make you a completely different person.

Answer:

2nd answer

Explanation:

took the test

As per the given scenario, tectonic movement forced certain segments of Earth's crust downward and other segments upward in jagged chunks. The correct option is B.

The mobility of the plates that end up making up the Earth's crust is referred to as tectonic shift. The Earth is composed of a dozen major plates and several minor plates.

According to the situation, tectonic movement pushed certain segments of the Earth's crust straight down and others upward in jagged chunks.

Thus, B is the correct answer.

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Because all of your cells in your body started off as single cells. That single cell then divided into multiple other cells. So it breaks down so it can help the entire body equally. In order for a cell to work 1,000 of these proteins need to be created.

Co-repressors activate repressor proteins thereby decreasing the synthesis of certain enzymes.

Co-repressors are proteins that bind to repressor proteins and enhance their ability to prevent gene expression. Repressor proteins bind to specific DNA sequences, preventing transcription of the associated genes. Co-repressors can enhance this repression by interacting with repressor proteins to stabilize their binding to DNA or recruit other proteins to the repression complex. This can lead to decreased synthesis of certain enzymes, which can have important physiological consequences. For example, in bacteria, co-repressors can help regulate the expression of genes involved in the uptake and metabolism of certain nutrients.

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Answer:

The combustion of fossil fuels such as coal and oil has raised the concentration of carbon dioxide in the atmosphere during the last century (CO2). This occurs because the combustion of coal or oil produces CO2 by combining carbon in the air with oxygen.

Answer:

its a on edg

Explanation:

The Answer is A.) Carbon dioxide

Cause it is produced as a waste product during respiration in the cells of the body tissues, diffuses into the blood.

The gecko's feet contain molecules that are attracted to the molecules on the surface.

Geckos are lizards which belongs to reptile group. They are found in warm climatic regions of the world. Geckos and some other animals can climb smooth surfaces because of presence of Van der waal forces of attraction between the molecules of gecko's feet with molecules of the surface. The force of attraction is generated due to fluctuations or differences in charge present in molecules of feet and that of surface. The charge fluctuations generally comes into sync and generate attractive force.

Most geckos are small, soft-skinned reptiles that are often nocturnal in behaviour. A small, robust body, a big head, and often well-developed limbs are other features they have. Each limb's tips are frequently fitted with digits that have adhesive pads.

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Answer:

D: Rest and Water

Explanation:

Sleep improves the potential ability of some of the body's immune cells to attach to their targets, according to a new study. The study helps explain how sleep can fight off an infection.

Answer:

D

Explanation:

because the water is resting and you need to rest

Grass  --> Grasshopper --> Lizard --> Garling --> Raven

Plant --> Worm --> Ants --> Lizard

Plant --> Butterfly --> Lizard -->  Raven

Plant --> Pigeon --> Raven

A food web is a visual representation of the interactions between different organisms in an ecosystem, showing the flow of energy and nutrients through the ecosystem.

It is a complex network of interconnected food chains, which describe the transfer of energy and nutrients between different organisms in an ecosystem.

In a food web, each organism is linked to other organisms through a series of arrows that show the direction of energy and nutrient transfer. At the base of the food web are producers, such as plants, which convert energy from the sun into food through photosynthesis. Herbivores, or primary consumers, eat the producers, and are then eaten by carnivores, or secondary consumers

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A descending spinal tract called the lateral corticospinal tract transmits voluntary motor impulses from the brain to the body's extremities damaged.

A spinal cord damage would prevent voluntary movement above and below the injured level. To accommodate the more nerve cells and connections required to process information relevant to the upper and lower limbs, two areas of the spinal cord are expanded (see Figure 1.10B). The ventral horn is spherical, whereas the dorsal horn is thin and reaches to the spinal cord's border. Reduced postural control and impaired selectivity of postural control can be caused by lesions to the cortico-reticulospinal system.

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The organism that would have the greatest amount of energy stored is the protozoa.

The organisms at the bottom of the food web (producers) typically have the greatest energy input, as they are the primary source of energy in the ecosystem. They capture the energy from the sun and convert it into organic compounds.

They may not have the greatest biomass or individual energy content compared to higher trophic levels.

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Explanation:

Answer:

Sand

Explanation:

I believe

Answer:

C. Sand

Explanation:

the last one

hope this helps :-)

Answer:

I think it is either a or c

Explanation:

Answer:

Genetics is the study of heredity.

The bacterial capsule or slime layer is composed of various biological molecules, primarily polysaccharides, but also proteins and sometimes nucleic acids.

These molecules play a critical role in the formation and function of the bacterial capsule, providing protection and aiding in bacterial survival.

Polysaccharides are the most common constituents of the bacterial capsule. These long chains of sugar molecules can be composed of different sugar units, such as glucose, mannose, or galactose.

The arrangement and composition of the sugars can vary among different bacterial species, giving rise to a diverse range of capsule structures.

Proteins can also contribute to the bacterial capsule composition, either as part of the polysaccharide matrix or as independent components. These proteins can be covalently linked to the capsule polysaccharides or associated with the surface of the bacterial cell.

They contribute to the structural integrity of the capsule and may have additional functions such as adhesion to surfaces or evasion of the host immune response.

In some cases, nucleic acids, particularly DNA, can be found in the bacterial capsule. This is more commonly observed in biofilm formation, where extracellular DNA can become embedded within the capsule matrix. The presence of DNA in the capsule can provide stability and structural support to the biofilm structure.

It is important to note that the specific composition of the bacterial capsule can vary greatly among different bacterial species and strains. This diversity allows bacteria to adapt to different environments and host interactions.

The presence of a capsule or slime layer is often associated with enhanced pathogenicity, as it can protect bacteria from host immune defenses and provide resistance to desiccation, antimicrobial agents, and other environmental stresses.

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Answer: The question is incomplete and the options are not given, the options was found on another websites , here are the options

A. check and replace air filters regularly

B. reduce, reuse, and recycle whenever possible.

C. fix leaking faucets and minimize outdoor water use.

D. reduce the amount of particulate matter by limiting burning.

The correct option is C.

fix leaking faucets and minimize outdoor water use.

Explanation:

Fix leaking faucets and minimize outdoor water use is a guideline for the environmental protection agency because fixing faucet will allow the device to deliver water to a plumbing system. If the faucets is leaking it will lead to water wastage and pollutants having entry through the water system, when it is fixed it will minimize the outdoor water use.

Answer:

There are plenty of things that we as individuals can do to slow down the amount of pollution going into the ocean, these could include not flushing anything down the toilet that won't disintegrate (because no matter where you live, all toilet pipes lead to the ocean), converting plastic use to reusable materials; this could include using reusable straws, water bottles, shopping bags, etc. and of course, when you need to throw plastic out, always recycle. :)  

Explanation:

I believe the best way an individual can help the oceans is by converting plastics to reusable or at least eco-friendly products. If everyone made a conscious effort to do this, the oceans would be MUCH clearer.

Hope this helps!

Answer:

Food production relies on biodiversity for a variety of food plants, pollination, pest control, nutrient provision, genetic diversity, and disease prevention and control. Both medicinal plants and manufactured pharmaceuticals rely on biodiversity

Answer:

Explanation: Plant cells that are being placed first in a medium for the purpose of the tissue culture are differentiated cells. Pluripotent cells or cells that are able to develop into all the specialized cell types and structures of plants are being produced by undifferentiated cells.

Answer:

One I know is dictatorship.

Explanation:

example stalin was the dictator of russia and had passed many laws that nobody else had a say in and would kill or send to prison any peapole who attemed to opose him.

Answer:

A. To help the body respond to the environment

Explanation:

The brain and neural systems of animals help them maintain homeostasis (the regulation of internal systems) and receive and respond to external stimuli.

Answer:

a

Explanation:

if there is no competition, the population can live happily

Answer:

The genetic material's inheritability shows how that the DNA of all creatures, both living and dead, can be traced back to a single point, which is our common ancestral origin of life.

Explanation:

Conjugation involves plasmids transferring genetic material between bacterial cells through a pilus. However, genes located on the bacterial chromosome, such as traD and traI, are also required for successful conjugation.

Conjugation is a process of horizontal gene transfer where genetic material is transferred between bacterial cells. This transfer involves the movement of plasmids from a donor cell to a recipient cell through a pilus. Although plasmids are essential for conjugation, there are several genes required for the process that is not located on the plasmid itself.

One of the genes required for conjugation is the traD gene, which encodes a protein that is involved in the initiation of the transfer process. The TraD protein is a coupling protein that binds to the DNA to be transferred and recruits the pilus to the cell surface. Once the pilus has attached to the recipient cell, the transfer of DNA can begin.

Another gene that is required for conjugation is the traI gene, which encodes a protein involved in the regulation of the transfer process. The TraI protein is a DNA-binding protein that is responsible for activating the expression of other genes required for the transfer process. This protein also plays a role in the processing of the DNA to be transferred, ensuring that it is in the correct form for transfer.

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