4. Who discovered the first known case of a typhoid carrier?

Answers

Answer 1

Answer:

Mary Mallon (September 23, 1869 – November 11, 1938), also known as Typhoid Mary, was an Irish-born cook believed to have infected 53 people with typhoid fever, three of whom died, and the first person in the United States identified as an asymptomatic carrier of the disease pathogen, Salmonella typhi.

Answer 2

Answer:

mary mallon

Explanation:

Mary Mallon, the first known case of a healthy carrier in the United States, was proven responsible for the contamination of at least one hundred and twenty two people, including five dead


Related Questions

Why do you think leewenhoek was excited about what he saw

Answers

Answer:

what kind of quastion is this

Explanation:

Pleaseeeeee i need this

Answers

Answer:

the rabbit is getting energy from nuts ,and grass the squirrel is getting energy from nuts ,grasshoppers ,and grass

Answer:

the rabbit is getting it's energy from the grass and the squirrel is getting it from the nuts

write an essay about importance of studying in environmental education? ​

Answers

Answer:

Environmental education increases public awareness and knowledge about environmental issues or problems. In doing so,individuals develop a deeper understanding of environmental issues and have the skills to make informed and responsible decisions.

Besides, it provides food, shelter, air, and fulfills all the human needs whether big or small. Moreover, the entire life support of humans depends wholly on the environmental factors. In addition, it also helps in maintaining various life cycles on earth.

In conclusion, environmental education has become a critical issue. In addition to individuals and governmental bodies, associations and learned societies have taken up the cause and published directories and handbooks about environmental education.


What term is used to describe the state at which a solute moves down its concentration gradient
through the plasma membrane and becomes evenly distributed in the cytosol?

Answers

4.solvent I’m pretty sure

Diffusion is used to describe the condition at which a solute moves down its concentration gradient through the plasma membrane and becomes uniformly distributed in the cytosol.

What is Diffusion?

Diffusion is the type of net movement of particles from an area of ​​higher concentration to an area of ​​lower concentration. It is driven by the gradient in Gibbs free energy or chemical potential.

This occurs through the semi-permeable membrane like the plasma membrane. Diffusion of small molecules and macromolecules such as proteins in aqueous solutions plays an important role in microorganisms, plants and animals.

Few examples of Diffusion are:

Perfume is sprayed in one part of the room so that it can spread easily so that we can feel its smell everywhere. A drop of food coloring spread throughout the water in a glass, the whole glass will be colored.

Thus, Diffusion is used to describe the condition at which a solute moves down its concentration gradient through the plasma membrane and becomes uniformly distributed in the cytosol.

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Where does the energy from and where does it end up?​

Answers

Answer:

Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix. These sources originate mostly in our local star, the Sun. Electricity falls into its own category because it's an energy carrier and not a primary source.

Which of the molecules from model 2 would form hydrogen bonds with itself or with water molecules if in a solution?

Answers

where is the model 2?

which is the biggest planet in our solar system?what colour is it?​

Answers

Jupiter

The largest planet in our solar system is Jupiter. Its got shades of white, orange, brown and red

Hope this helped you- have a good day bro cya)

temperate grasslands

Answers

temperate grasslands is a terrestrial biomes defined by the worldwide fun for nature the predominant vegetation in this bio consists of grass and/or shrubs the climate is temperate and ranges from semi-arid to semi-humid

por que es tan importante el agua para nuestro cuerpo? Como podemos incorporarla en nuestro organismo?

Answers

Respuesta:

El agua es muy importante para nuestros cuerpos, porque la necesitamos para vivir y ya la correperamos en nuestro organismo.

Explicación:

Sin agua moriremos, y el agua ya está incorporada, somos aproximadamente un 60% de agua.

Short note on : Sustainable harvesting on herbal plants​

Answers

Answer:

The ecological definition of sustainable harvesting is harvesting that allows population numbers to be maintained or to increase over time. A lagging economy and a lack of alternative construction materials make mangrove harvesting inevitable, and for local people, an economic necessity.

funny story....i have an assignment which requires me to get questions about "tissue respiration" and submit to my teacher in the next biology lesson which is tomorrow:(( does anyone know any questions about this topic:) helpppp​

Answers

Answer:

why is it called tissue respiration is a good question I guess

and why is tissue respiration important?

what happens during glycolysis?

True or false the nucleus makes the cells DNA

Answers

Answer:

true

Explanation:

Answer:

Hope that helps

Explanation:

The nucleus (plural, nuclei) houses the cell's genetic material, or DNA, and is also the site of synthesis for ribosomes, the cellular machines that assemble proteins. Inside the nucleus, chromatin (DNA wrapped around proteins, described further below) is stored in a gel-like substance called nucleoplasm.

Explain how photoperiodism is critical to the survival and reproductive success of many plants.

Answers

Answer: Photoperiod controls many developmental responses in animals, plants and even fungi These mechanisms include the detection of the light signal in the leaves, the entrainment of circadian rhythms, and the production of a mobile signal which is transmitted throughout the plant.

6. Why can't water be used to dissolve the
caffeine found in coffee and tea?

Answers

Caffeine or supercritical carbon dioxide is a less polar compoundWater is highly polar solvent.So water can't dissolve caffeine much.

Alcohol is used to extract caffeine

Tea's chief component is cellulose, which is not soluble in water. Caffeine is water soluble, but so are tannins and gallic acid, which have been established during the heating process of tea leaves. The latter two components can be converted to insoluble in water calcium salts.

What is solubility?

The maximum amount of a substance that will dissolve in a given amount of solvent at a given temperature is defined as solubility.

Solubility is a property of a specific solute-solvent combination, and the solubilities of different substances vary greatly.

It is one of the critical parameters for achieving the desired drug concentration in systemic circulation for the desired (anticipated) pharmacological response.

Caffeine is more soluble in nonpolar methylene chloride than in water, so it will migrate to the methylene chloride layer (known as the organic layer). Because the organic layer is denser than water, it will be at the bottom.

Thus, water can not be used to dissolve the caffeine found in coffee and tea.

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which of the following statements is NOT part of the cell therory

Answers

Answer:

it is accepted that cells contain DNA in chromosomes and RNA in the nucleus and cytoplasm, but only in the modern cell theory. the classical cell theory does not include this. but using either classical or modern theory, it is false that all cells have DNA surrounded by a nucleus.

Explanation:

Hope this helps.

Which amino acids would be found in the mutated proteins?

Answers

The essential amino acids are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. The nonessential amino acids are alanine, asparagine, aspartic acid, glutamic acid, and serine.

Answer:

Amino acid sequence: Valine- Threonine- Aspartic acid- Cysteine- Serine- Cysteine

Explanation:

The mRNA sequence is read in a group of three nucleotides called CODON. Each codon specifies a particular amino acid. According to this question, using the genetic code table, the given DNA sequence is as follows:

DNA: CAT- TGG- CTA- ACG- TCG- ATA- ATC- GTC- GGT- AC

RNA = GUA- ACC- GAU- UGC- AGC- UAU- UAG- CAG- CCA- UU

3.
What two molecules are produced during Photosynthesis?

Answers

Answer:

outputs Glucose, oxygen

Explanation:

Explanation:

photosynthesis requires sunlight, carbon dioxide and water as starting reactants (figure 5.5). After the process is complete, photosynthesis releases oxygen and produce carbohydrate molecule, most commonly glucose. These sugar molecules contain the energy that living things need to survive.

During the process of photosynthesis, cell use carbon dioxide and energy from the sun to make sugar molecules and oxygen.

What is meant by this statement?
Determine the necessity for a one-to-one correspondence between a specific representation in the mind and a physico-chemical condition in some specific neurons/synapses in the associated brain.

Answers

To determine a Brian in its skull for 1.99 and

how often did henrietta lacks cells replicate?

Answers

every 24 hours and they never stopped.

Type your response in the box.
Explain why it's important for scientists to study the Sun. List at least two challenges researchers face when
examining Earth's nearest star.

Answers

Answer:

its very important in our day to day life

Explanation:

the sun is our closest star and there are many theorys about it that need to be proven right or wrong

Understanding the Sun will help us better understand stellar life cycles and the origins of our solar system. The cost of the equipment needed to research the Sun is prohibitive. The Earth's distance from the Sun must also be considered, as well as how equipment must resist the Sun's intense heat.

Please give brainliest.

State the role of the light stage of photosynthesis to the Calvin cycle.​

Answers

Answer:

In the light-independent reactions or Calvin cycle, the energized electrons from the light-dependent reactions provide the energy to form carbohydrates from carbon dioxide molecules. The light-independent reactions are sometimes called the Calvin cycle because of the cyclical nature of the process.

Explanation:

16. Which of the followings is the symptom of malaria? (a) Chills (b) Fevers (c) Recurring attacks (d) All ​

Answers

Answer:

fevers

Explanation:

sometimes parasites remain in the liver before multiplying.

The new parasites then enter the blood,multiply within the red blood cells and cause the following symptoms:Fever, Headache, shivering,Joint pain , Vomiting & convulsions

9. When you have a problem at hand and you want to solve it using the scientific method, what is the immediate step that you should do?

A. Analyse data
B. Collect data
C. Hypothesize
D. Make a conclusion​​

Answers

Answer:

C.hypothesize

Explanation:

because the hypothesize it he want to solve problem using scientific step,so it is hypothesize

Giving brainlest to correct answer!!!! :D

Answers

It’s the first one it modifies packages and transports the lipids and proteins.

what organ system do you use to
You lift your feet and move your legs as fast as you can

Answers

The muscular system I think

Doing a timed thing please hurry

Answers

Answer:

its true. its called a chemical reaction.

Explanation:

Answer:

Yes, this is true.

Explanation:

Minerals are prone to destruction by elements such as oxygen, heat, and acid.

True or False

Answers

Answer:

True

Explanation:

Minerals are prone to destruction by different elements such as oxygen, heat, and acids treatment. The given statement is true. On treatment with these elements, minerals loose their properties.

What are minerals?

Minerals are the naturally occurring inorganic elements or compounds which posses an orderly internal structure and characteristics with the specific chemical composition, crystal form, and properties such as physical properties and chemical properties. Minerals differ from the rocks, which are the naturally occurring solids that are composed of one or more types of minerals.

Minerals show properties which can be lost by the treatment with different elements. Minerals have been found to be prone to destruction by the elements such as oxygen, heat, and acids. Minerals undergo chemical and physical change on treatment with these elements and form different products which show different characteristics than the parent minerals.

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Which of the following materials would not normally be found in glomerular filtrate?

A. Glucose
B. Urea
C. Water
D. Protein

Answers

Answer:

c is Answer

Explanation:

Hope it's Helpful

Answer:

Glucose

Explanation:

8. A wise old wizard once told me that when your muscles use ATP they are really using light
energy. What did the wise wizard mean?

Answers

Answer: in humans, we don't use light energy to make ATP but in plants however, they create ATP in a proccess called photosynthesis, this process requires light to be absorbed twice, once in each photosystem, and it makes ATP. In fact, it's called photophosphorylation because it involves using light energy (photo) to make ATP from ADP (phosphorylation)

Explanation:

Which statement about the nucleus of a cell is NOT true?

Answers

Answer:

Hey mate....

Explanation:

This is ur answer....

C) The nucleus is the site of protein assembly.

Hope it helps!

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