wn bacteria is isolated from 20 sick individuals. Their samples were grown in culture and then p
■ 10 healthy mice. Those mice started to show signs of a heightened immune response. According to Koch's
ostulates what is the next step in determine whether the bacteria is pathogenic?
Classify the bacteria as a noncommunicable disease.
O Classify the bacteria as a communicable disease.
Reisolate it, and determine if it is the original unknown bacteria.
O Treat the original 20 individuals with antibiotics.
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Answers
Reisolate it, and determine if it is the original unknown bacteria.
What is the toxicity of a microorganism?According to Koch's postulates, to determine the toxicity of a microorganism the following steps should be taken:
1) Isolate the microorganism from the organism in which it is present.
2) Introduce these microorganisms to other organisms.
3) Check if the disease or infection has occurred in the organisms in which the microorganism was injected.
4) If yes, then reisolate the bacteria. Check if it is the same bacteria that caused the disease in the initial organisms.
5) perform lab experiments on the microorganism and determine it.
Thus, this could be the answer.
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Related Questions
10 PTS! What is a good idea for a scientific experiment?
Answers
An experiment is a procedure carried out to support, refute, or validate a hypothesis. Experiments provide insight into cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated. scientific problem is something you don't understand but you can do an experiment to help you understand. Scientific problems are usually based on observation of scientific phenomena.
well, here are two ideas.. you can pick one you like.
First one - Skittles Science
A Lesson in: Stratification
A great way to get rid of extra candy, this easy science experiment for kids uses Skittles and whatever liquids you want to use. The idea is, the candy is made of ingredients that dissolve, so kids get a chance to guess which liquid will make the Skittles dissolve the fastest. Get more info over at Little Bins for Little Hands.
Messiness factor: 2 sponges
Second one - Pasta Rocket
Believe it or not, you can create a very simple hybrid rocket engine using nothing but some yeast, hydrogen peroxide, a jar, fire and ... a piece of uncooked pasta.
When you mix the yeast and hydrogen peroxide together, they react and create pure oxygen gas. When this gas is funneled through a piece of pasta, all you need is a little bit of fire and you've got yourself a pasta rocket.
Since the concept of the self is all about how humans view themselves, this concept is interesting to both sociologists and
a)cardiologists.
b)geologists.
c)economists.
d)psychologists.
Answers
Since the concept of the self is all about how humans view themselves, this concept is interesting to both sociologists and psychologists.
What is the self? The self is a multifaceted notion that encompasses different perspectives and theories. The self can be described as a cognitive and effective representation of one's own personality, including cognitive and effective elements and processes.The self is also an entity that serves as a reference point for thought and behavior, which is the source of consciousness and identity. The self is the object of self-knowledge, which is distinct from knowing other objects. As a result, the self is a major source of motivation, self-regulation, and self-control, which are important to human socialization and functioning.
Sociologists: Sociologists who are interested in the self examine the ways in which people interact with others and how these interactions influence a person's self-concept and identity. Sociologists examine the way in which social institutions shape an individual's self-concept, such as the family, religion, education, and mass media.
Psychologists: Psychologists who are interested in the self study how the individual constructs and represents themselves in their internal lives. This is known as self-concept or self-identity. Psychologists are interested in examining how people's experiences, such as social interactions or life events, affect their self-concept or self-identity. In addition, psychologists examine the role that self-concept plays in guiding behavior and making choices.
Answer: D) Psychologists.
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one of the first pathophysiological responses to the decreased gfr in acute renal failure is: increased urination. reabsorption of bun. activation of the renin-angiotensin-aldosterone system. secretion of creatine.
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One of the first pathophysiological responses to the decreased glomerular filtration rate (GFR) in acute renal failure is the activation of the renin-angiotensin-aldosterone system. GFR refers to the rate at which the kidneys filter blood. Renal failure is a condition characterized by the kidneys' inability to function properly, leading to a decrease in GFR and other symptoms.
Acute renal failure (ARF) occurs when the kidneys abruptly lose their ability to function properly. ARF is a medical emergency that requires urgent intervention. A decrease in GFR is one of the earliest signs of ARF. ARF is classified based on the cause of the condition, which can be pre-renal, intra-renal, or post-renal. Pre-renal ARF is caused by inadequate blood flow to the kidneys, intra-renal ARF is caused by damage to the kidney tissue, and post-renal ARF is caused by a blockage in the urinary tract.
In response to decreased GFR, the kidneys release renin, an enzyme that activates the renin-angiotensin-aldosterone system. This system plays a crucial role in regulating blood pressure and fluid balance. When activated, the renin-angiotensin-aldosterone system causes the kidneys to retain salt and water, which helps to maintain blood pressure and increase GFR. The system also causes the blood vessels to constrict, which further increases blood pressure.
The activation of the renin-angiotensin-aldosterone system is a physiological response that occurs in the early stages of ARF, before the onset of other symptoms.
In conclusion, the activation of the renin-angiotensin-aldosterone system is one of the first pathophysiological responses to the decreased GFR in acute renal failure.
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explain the secondary sexual growth in both male and female.
Answers
Answer:
Although the question is pretty simple,the answer,I'm afraid, could occupy a whole volume of a book.
But very simply put the secondary sexual growth in males is under the influence of testosterone. Males also produce estrogen but in very small amounts,which makes the effect of estrogen very minimal and almost negligible.
Sexual growth in females is under the influence of estrogen and then progesterone.
In both cases,the physiological process is quite similar:
At puberty in males,the hypothalamus produces gonadotropin releasing hormones which causes the anterior pituitary lobe to produce leutinizing hormones(LH) and follicle stimulating hormones(FSH). LH acts on leydig cells in the seminiferous tubules of the testes to produce testosterone and FSH acts on the Sertoli cells in the seminiferous tubules of the testes to produce androgen binding proteins(ABP). Together testosterone and ABP cause sperm production.
At puberty in females, ,the hypothalamus produces gonadotropin releasing hormones which causes the anterior pituitary lobe to produce leutinizing hormones(LH) and follicle stimulating hormones(FSH). FSH causes growth of the primordial follicle into a mature Graafian follicle while LH presence causes exocytosis of the mature oocyte (ovulation) in about 48hours.
18. Taxonomy grew as a science partly because ofA. the development of printing and navigationB. the work of Pliny the ElderC. the decline of the Greek civilizationD. none of the above helped taxonomy grow as a science
Answers
Taxonomy is a system of classification used in science specially to the classification of living organisms. Threfore, the taxonomy grew as a science there is none of the above as a way to help it grow as a science, being the correct alternative the D.
please help
Did water move into or out of the cell in the hypotonic solution? Question 11 options:
A. out of
B. into
Answers
Answer:
A, out of
Explanation:
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Does mitosis or meiosis occur more frequently in your body? Explain your answer
Answers
Answer:
Mitosis
Explanation:
Meiosis is the splitting of sex cells which happens during reproduction. Mitosis is the splitting of body cells in order to make more body cells. Mitosis is how your body grows, therefore it occurs more frequently because the body is not constantly reproducing.
In the human body, mitosis occurs more frequently than meiosis. Mitosis is a type of cell division that happens in somatic cells, which are non-reproductive cells.
It is responsible for growth, repair, and maintenance of tissues in the body. On the other hand, meiosis occurs only in reproductive cells, such as sperm and egg cells, and is involved in the formation of gametes for sexual reproduction.
Here is a step-by-step explanation:
1. Mitosis: Mitosis is a process where a single cell divides into two identical daughter cells. It consists of several stages: interphase, prophase, metaphase, anaphase, and telophase. During interphase, the cell grows, replicates its DNA, and prepares for division.
Then, in prophase, the DNA condenses into chromosomes, and the nuclear membrane breaks down. In metaphase, the chromosomes align in the middle of the cell. Next, in anaphase, the chromosomes separate and move to opposite ends of the cell. Finally, in telophase, two nuclei form, and the cell divides into two daughter cells.
2. Meiosis: Meiosis is a specialized type of cell division that produces gametes with half the number of chromosomes as the parent cell. It involves two rounds of division, resulting in the formation of four haploid cells. Meiosis consists of two main stages: meiosis I and meiosis II.
In meiosis I, the homologous chromosomes pair up, exchange genetic material in a process called crossing over, and then separate, reducing the chromosome number by half. Meiosis II is similar to mitosis, as the sister chromatids separate and move to opposite ends of the cell. The end result is the formation of four genetically unique haploid cells.
Although both mitosis and meiosis are essential for different purposes, mitosis occurs more frequently in the body because it is involved in the growth, repair, and maintenance of tissues.
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Can someone help me with a biology lab?
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What are the different colors of cockatiels?
Answers
There are several different mutations of cockatiels currently available, including lutino, lutino pearl, pied, pearly pied, cinnamon, cinnamon pied, cinnamon pearly pied, pearl/lacewing, fallow, olive, emerald/spangled, whiteface, albino, and silver.
The weero/weiro is another name for the cockatiel. A medium-sized parrot known as a quarrion is an Australian native and a member of its own branch of the cockatoo family. They are appreciated as companion parrots and home pets all over the world and are reasonably simple to breed. Cockatiels are the second most popular caged bird after budgerigars.
The single species of Nymphicus is the cockatiel. The cockatiel was originally classified as either a little cockatoo or a crested parakeet, but more recent DNA research have given it its own subfamily, Nymphicinae. As a result, it is presently considered to be the smallest subfamily of the Cacatuid (cockatoo family)
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Who’s know stuff about child development?
Answers
The child development stuff is well known to the doctors and the nurse, and they advise mothers during the time of the pregnancy to take care of the baby in different ways.
What is the role of the medical staff?The medical field employs a variety of personnel, including doctors, experts, nurses, caregivers, and others, but the doctor and nurse roles are directly related to patients. They take care of patients of different types, such as those with minor to major health issues.
Hence, the child development stuff is well known to the doctors and the nurse, and they advise mothers during the time of the pregnancy to take care of the baby in different ways.
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why knowing parentage is important. How could this knowledge help wild populations of endangered species? How could it also help with zoo populations?
PLEASE ANSWERR tysm
Answers
Answer: Many species are likely to require captive breeding to ensure their survival. ... "Genetic diversity is important to conserve as it has developed through ... for captive breeding also often results in inbreeding in wild populations. This is because the population has reduced in size to the point that ... Help · FAQ ...
Knowing about the parentage is important as it provides information of the origin of organisms and the variations in them that help in making correct pedigrees.
Parentage is the identity and origins of your parents. It is the tool to show the origin and changes in the genes to know the correct pedigree. In humans, it can help in finding out if the child is adopted or conceived, or sired.
Importantce of parentage:
applicable to seed stock producers benefits to commercial producersensures correct pedigreeKnowing variation in pedigreeHelp in the zoo:
It helps in observe family relationships or are bred in pairs and so parentage is certain of different species.
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Two different people had their DNA tested because they were suspects in an investigation. The results came back stating that their DNA was exactly the same. What can MOST likely be concluded based on these results
Answers
Fossil fuels (oil) are part of which cycle?
carbon
nitrogen
phosphorus
oxygen
Answers
Carbon is a part of rocks and fossil fuels like oil, coal, and natural gas etc...
What is a isotonic solution? How does it affect a red blood cell?
What is a hypertonic solution? How does it affect a red blood cell?
What is a hypotonic solution? How does it affect a red blood cell?
Answer plz!
Answers
Answer: If you place an animal or a plant cell in a hypertonic solution, the cell shrinks
Explanation: because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). ... A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.
An isotonic solution is one wherein the solute concentration across the semipermeable membrane is the same resulting in an equilibrium state.
They do not shrink or swell in an isotonic saline solution, i.e., 0.9% w/v solution of sodium chloride
Hypertonic solution: A solution that contains more dissolved particles (such as salt and other electrolytes) than is found in normal cells and blood.
Now, let’s suppose RBCs are placed in a solution with a sodium chloride concentration of 2% w/v. The sodium chloride concentration of 2% w/v is greater than the RBC’s sodium content and hence the solution is hypertonic. This will result in shrinkage of the RBCs known as crenation
When a solution has a lower solute concentration than the solution present across the semipermeable membrane, it is known as a hypotonic solution. As a result, when a cell is placed in a hypotonic solution, an osmotic pressure gradient forces the solvent to move into the cell in order to attain equal solute
In another situation, let’s suppose RBCs are placed in a solution with a sodium chloride concentration of 0.1 % w/v. The sodium chloride concentration of 0.1% w/v is less than the RBC’s sodium content and hence hypotonic saline. This will result in swelling and eventually bursting of the RBCs which will result in the release of hemoglobin. This is known as hemolysis which is a very dangerous situation.
During the first 6 to 8 weeks of gestation, the principal source of estrogen and progesterone is:
Answers
During the first 6 to 8 weeks of gestation, the principal source of estrogen and progesterone is the corpus luteum. The corpus luteum is a temporary endocrine structure that forms in the ovary after ovulation, and it secretes both estrogen and progesterone.
After ovulation, the corpus luteum begins to produce large amounts of progesterone, which prepares the uterus for implantation of a fertilized egg. If fertilization occurs, the corpus luteum continues to produce progesterone to support the early stages of pregnancy until the placenta takes over this function. Estrogen also plays an important role in early pregnancy by stimulating the growth and development of the fetus and the placenta.
If fertilization does not occur, the corpus luteum will begin to degenerate after about 10-14 days, which causes a drop in estrogen and progesterone levels and triggers menstruation.
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Which is part of the digestive system?
Liver
Brain
Aorta
Lungs
Answers
Answer:
a
Explanation:
Answer:
liver is part of the digestive system
3. The diagram below represents the organizational levels of living things. Which of the following examples represents an example of the missing organizational level? *
A. Blood
B. Heart
C. Plasma
D. Vein
Answers
Answer:
im,not for sure but I think it's B
Explanation:
Add the diagram to your question and I can probably get it for sure
Answer:
the answer is B heart hope it helps Mark me as Brainly plz
easy biology question below first correct answer gets brainliest
Answers
Answer:
Explanation:
Following the rule of "like dissolves like", the hydrophilic head of the phospholipid molecule dissolves readily in water. The long fatty acid chains of a phospholipid are nonpolar, and thus avoid water because of their insolubility
If deforestation continues at its current rate, what percent of the Amazon biome will not have
trees by the year 2030?
Select one:
O a. 27%
O b. 31%
O c. 20%
O d. 37%
Answers
If deforestation continues at the current rate, 37% of the Amazon biome will be treeless by the year 2030
The d. 37%What happens if deforestation continues in the Amazon?The Amazon Rainforest is also home to the largest variety of species in the world, from insects to dolphins to birds. In the next 25 years, if deforestation continues at this rate, nearly half the world's species of plants and animals will be destroyed or severely threatened.
What is the percentage of deforestation in the Amazon rainforest?Also according to the same intersection, 813 km² were destroyed in state public forests, which is equivalent to 8% of the total deforested in the Amazon. In these areas, deforestation also reached the highest accumulated in the decade, growing 26% compared to 2020.
With this information, we can conclude that In addition to causing environmental imbalance, the extinction of species can impact economic activities, such as agriculture, fishing and livestock. Deforestation in the Amazon contributes to the increase in global warming.
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a horse has 64 chromosomes in her somatic cells how many chromosomes are in her egg cells
Answers
64 chromosomes are found in each horse diploid cell (2n=64). 64 chromosomes are found in each horse diploid cell (2n=64). Equus caballus, the horse, contains 64 chromosomes, or 32 pairs.
The donkey has 62 chromosomes whereas the horse has 64 (32 pairs) (31 pairs). The mule acquires 63 chromosomes when they mate (32 from the horse and 31 from the donkey). The chromosomes are not in pairs during meiosis, and because their number is reduced by half, the sex cells frequently lack a full set of chromosomes.
The donkey has 62 chromosomes whereas the horse has 64 (32 pairs) (31 pairs). The mule acquires 63 chromosomes when they mate (32 from the horse and 31 from the donkey).
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Which of the following organisms is a tertiary consumer?
O frog
O redwood tree
O great white shark
athlete's foot fungus
Answers
Answer:
Great White Shark
Explanation:
The great white shark is top of the food chain. The fungus is the bottom of the food chain with the decomposers. The redwood tree is the Primary consumer sense it gets its needs from the sun and the nutrients from the ground. Lastly, the frog is the fourth of the food chain with the Carnivores, secondary consumers.
Data Nugget - Breathing In, part 1
Did the data support Kristina and Susan's hypothesis? Use evidence to explain why or why not. If you feel the data was inconclusive, explain why.
Answers
(Yes, the evidence backs up the researchers' hypothesis.)
Explanation:What are the research's hypotheses?
A hypothesis outlines your expectations for the results of your investigation. It is a speculative, untested response to your research question. You might need to develop a number of hypotheses for some research projects that speak to various facets of your research issue.
According to the information provided, fish parents who had received a full diet emerged in every case with the exception of the fanning occurrence in females.
Consider the difference between the number of mouthing occurrences among guys receiving the full ration (30.7) and those receiving the half ration (24.5).
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Cr from this answer: ByaptiMahapatra
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Bees and flowering plants are in an ecological relationship flowers provide bees with nectar and pollen which worker bees collect to feed their entire colonies bees provide flowers with the means to reproduce by spreading pollen form follower to follower
What species are being benefited and harmed
Answers
The relationships between different organisms within an ecosystem are known as ecological interactions, and they can be beneficial, harmful, or neutral. Ecological interactions between bees and flowering plants benefit both species. Flowers supply nectar and pollen, which bees collect and feed themselves as well as their entire colony.
Bees, in turn, benefit flowering plants by aiding in pollination and spreading pollen from one plant to another, which is important for plant growth and seed formation. Since it is a mutualistic relationship where both species benefit from the interaction, neither species is harmed by it.
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Identify structures of organic compounds and functional groups (carboxyl, amine, phosphate, hydroxyl)
Answers
Answer:
Explanation: they are all hydrophilic and increase the solubility of the organic compound
Hydroxyl -OH
Carbonyl =C=O
Carboxyl -COOH
Amino NH2
Phosphate PO 3- 4
What would happen to a plant cell if it placed in water?
Answers
Answer: It really depends on if the water solution is hypotonic, hypertonic, or isotonic. If it is hypotonic (water with less salt or other dissolvent in it than the cell), you can expect the cell to take in water and expand. If the water is isotonic (about the same amount of dissolvent in it as the cell) just about nothing will happen, or if the water is hypertonic (more dissolvent in the water than the cell) the water can seep out of the cell, and into the water.
True or false: Due to starvation, amino acids from muscle tissue are converted into glucose. This wastes muscle tissue and can lead to edema.
Answers
Answer:
True
Explanation:
Because all the amino acids in the tissue muscle are converted tp glucose so u could have energy to live
3. If a mutation occurs on a segment of DNA that codes
for an enzyme, what is most likely to happen to the
enzyme?
Answers
A amino acid that is synthesized changes as a result, which may alter the structure of an enzyme's active site.
What is an easy way to define enzyme?A biological catalyst called an enzyme is usually always a protein. It promotes a certain chemical reaction inside the organism. The enzyme is continuously employed during the process and is not destroyed.
What is an example of an enzyme?Several instances include: Lipases: This class of digestive enzymes aids in the breakdown of lipids in the gastrointestinal tract. Hydrolyzes: Enzymes assists in the transformation of starches to sugars inside the salivary. The salivary enzyme maltose breaks down the sugar malted grains into glucose.
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In your opinion, how much control should a school exercise over the way students dress? Should students have the freedom to express your opinion and synthesize information from multiple sources.
Answers
- It maintains a equality among the students, no one will be jealous with someone wearing DIOR and someone wearing dollar store clothes.
if mom's genotype is bb, her eggs will be ______.
Answers
Answer:
bb
Explanation:
Part of a tree’s canopy is in the shade, and part receives full sun. If the stomata are open to the same degree, which leaves will contribute more to the transpiration rate of the tree?
Multiple Choice
Leaves in the sun
Leaves in the shade
Both transpire equally
Answers
As they acquire more energy from the sun, which raises the pace at which water evaporation from the leaves through the stomata, leaves in the sun will contribute more to the transpiration rate of the tree.
What impact will additional leaves have on transpiration rate?Because they contain more stomata, plants with larger leaf surfaces tend to lose more water through transpiration.
Does having more leaves increase transpiration?More stomata for gaseous exchange and leaves (or spines, or other photosynthesizing organs) equate to a larger surface area. More water will be lost as a result of this. More stomata will result in more transpiration pores.
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