Which of the following statements are part of Koch’s Postulates? Check all that apply.

A - The disease-causing microorganism must be present in at least half of the cases of disease.

B -The microorganism can be isolated and grown in a pure culture.

C - The microorganism from the pure culture will cause the disease in at least 80% of healthy organisms.

D - A re-isolated microorganism may evolve into a different species than the original.

Answers

Answer 1

Answer:

B

Explanation:

'The microorganism can be isolated and grown in a pure culture', is the only correct answer.

Answer 2

The statement that a microorganism can be isolated and grown in a pure culture is a part of Koch’s Postulates.

What are microorganisms?

A microorganism, or microbe is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells.

The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India. The scientific study of microorganisms began with their observation under the microscope in the 1670s by Anton van Leeuwenhoek. In the 1850s, Louis Pasteur found that microorganisms caused food spoilage, debunking the theory of spontaneous generation. In the 1880s, Robert Koch discovered that microorganisms caused the diseases tuberculosis, cholera, diphtheria, and anthrax.

Because microorganisms include most unicellular organisms from all three domains of life they can be extremely diverse. Two of the three domains, Archaea and Bacteria, only contain microorganisms.

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Related Questions

the circulatory fluid found in annelids and all vertebrates is called

Answers

Answer:

Most vertebrates and some invertebrates, such as this annelid earthworm, have a closed circulatory system. (b) In open circulatory systems, a fluid called hemolymph is pumped through a blood vessel that empties into the body cavity. ... The blood is called hemolymph because it mixes with the interstitial fluid.

Explanation:

Hope this helps...

make a claim about how the metabolic rates of endotherms compare with those of ectotherms of similar mass. support ur claim with at least three pairs of data points from the graph

Answers

Endotherms have higher metabolic rates compared to ectotherms.

Endotherms include organisms that can regulate their own temperature. Some examples are:

RabbitsDogsKangaroosChimpanzees

On the other hand, ectotherms depend on sunlight or heated surfaces to regulate their temperature. Some examples are:

PythonsCodCrocodilesLizards

In general, endotherms have higher metabolic rates. Let's see some examples:

The Gila monster and the partridge both weigh about 800 grams but the partridge (endotherm) has a metabolic rate of 3 joules/s, while the Gile monster (ectotherm) has a metabolic rate of 0.2 joules/s.The python and the raven both weigh about 2000 grams, but the raven (endotherm) has a metabolic rate of 8 joules/s, while the python (ectotherm) has a metabolic rate of 0.2 joules/s.The rabbit and the sandbar shark both weigh about 6000 grams, but the rabbit (endotherm) has a metabolic rate of 8 joules/s, while the sandbar shark has a metabolic rate of 1.5 joulse/s.

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How can a star be extremely hot like Alpha Canis Majoris (4 times hotter than our sun) but give off so little light (only 2% of our sun’s light)?
It's on Earth Science.

Answers

Answer:

this is due to the fact that stars are suns of other galaxy as we know that we have about a million galaxies in space. the earth is located in the milky way galaxy so these stars are about a 150 billion kilometres from earth

Solar radiation is a broad word for the electromagnetic radiation that the sun emits. It is also sometimes referred to as the solar resource or just sunshine. A multitude of devices can be used to collect solar radiation and transform it into useful forms of energy, such as heat and electricity.

How much of the Sun do we actually see?Sunlight at Earth's surface is roughly 42 to 43 percent visible (400 to 700 nm), 52 to 55 percent infrared (above 700 nm), and 3 to 5 percent ultraviolet in terms of energy (below 400 nm).The Sun always emits the same amount of energy. Insolation refers to the incoming solar radiation. Seventy percent of solar energy makes it to the planet.99.8% of the mass in our solar system is found in the Sun. Everything, from tiny Mercury to the gas giants to the Oort Cloud, 186 billion light-years away, is kept in place by its gravitational attraction.

What would occur if our distance from the Sun increased by 10%?More radiation, ultraviolet rays, heat, and other rays would be directed at our atmosphere. It would be impossible to live. According to my projection, the global average temperature would increase from 16 C to 65 C. (149 Fahrenheit). This would be high enough to prevent most life from existing, yet low enough to prevent water from boiling.The solar system itself, the Sun Between 99.8 and 99.9 percent of the mass of the solar system is found in the Sun. The remaining matter is distributed among the planets and their satellites, asteroids, comets, and the gas and dust that surrounds our star.

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where would you expect to find the receptor for a nonpolar ligand?

Answers

Answer:

found in the cytoplasm of the cell

Explanation:

Which sources of energy are used by humans to produce electrical energy

Answers

Answer: sources of energy are used by humans to produce electrical energy fossil fuels (coal, natural gas, and petroleum), nuclear energy, and renewable energy sources.

Explanation:

I hope that's what you're looking for. Have a nice day.

An ecosystem that can experience a disturbance without being fundamentally damaged is said to have __________________.​

Answers

An ecosystem that can experience a disturbance without being fundamentally damaged is said to have: Inertia.

An ecosystem can be defined as a biological community or space that comprises all living organisms (biotic factors) and the physical environment (abiotic factors) with which they interact.

Basically, an ecosystem is responsible for the provision of the following essential services that are very vital and important for the sustenance of life in all living organisms;

Plant pollination.Water purification.Nutrient cycling.

Additionally, an ecosystem is said to have an inertia if it experiences a disturbance or factor of changes without it being damaged significantly or fundamentally.

For example, the development of shrub forests during the Medieval Warm Period is an inertia of the ecosystem.

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Which of the following is NOT true about the Law of Conservation of Energy?
A. It states that the total energy in the universe keeps increasing.
B. It applies to everything in the universe.
C. It states that energy is transformed from one form to another.
D. It states that energy is neither created nor destroyed.

Answers

It states that the total energy in the universe keeps increasing

If this organelle was removed the cell would no longer be able to perform cellular
respiration?

Answers

Answer:

No energy would be produced for the cell since cellular respiration wouldn't occur. Proteins would not be made. All the organelles would bump into each other and they would not be held in place. ... Controls the cell's activities.

Explanation:

Which of statement best describes the energy needed for photosynthesis and
cellular respiration to take place? (B.9B)
Neither process needs energy
Chemical energy is need for photosynthesis and cellular respiration
Solar energy is need for both process
Solar energy is needed for photosynthesis and chemical energy is need for
cellular respiration

Answers

Answer:

Option D.) Solar energy is needed for photosynthesis and chemical energy is need for  cellular respiration, should be your answer here.

Explanation:

The sun gives solar energy to the plant, which is how photosynthesis happens, and chemical energy is needed in order to form glucose (sugar) in cellular respiration.

The statement best describes the energy needed for photosynthesis and cellular respiration to take place is photosynthesis and chemical energy is need for the process.

What is the first step of cellular respiration?

Glycolysis has been known as the first step of the cellular respiration. During this process molecules of the glucose break down in order to form the pyruvate molecules including 2 ATP molecules.

During the process of glycolysis there has no requirement of the oxygen. Therefore, the process has been known as the anaerobic process. During the process of the glycolysis glucose which has been converted into the pyruvic acid and energy has been released for the formation of the high energy molecule.

The process of photosynthesis takes place in the green plants and during the process of photosynthesis green plants prepare their own food in the presence of sunlight and the process is known as photosynthesis. During this process heat energy converted into chemical energy.

Therefore, The statement best describes the energy needed for photosynthesis and cellular respiration to take place is photosynthesis and chemical energy is need for the process.

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Answer this please
fastest answer gets brainliest!!

Answers

Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.

   

this is in my own words give me brainliest

Answer:

Cellular respiration is a metabolic pathway that breaks down glucose and produces ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.

 

this is in my own words give me brainliest lol im fastest

True or False: Cellulose is a polysaccharide that functions as a structural carbohydrate

Answers

Answer:

True

Explanation:

Cellulose is a carbohydrate, meaning it can be identified as a polysacharide. It is often used by plants in the construction of a cell wall in cells. Meaning it also functions as a structural carbohydrate.

Thus, it can be thought that cellulose is a polysaccharide that functions as a structural carbohydrate.

which description of skeletal cartilage is incorrect?

Answers

The incorrect description is that Costal cartilages reinforce airways and support the external nose

The options were omitted but the complete question is :

Which description of skeletal cartilage is incorrect

Fibrocartilages are able to withstand both pressure and stretch.

Costal cartilages reinforce airways and support the external nose.

Elastic cartilages are able to tolerate repeated bending.

Articular cartilages cover the ends of most bones at moveable joints.

Costal cartilages are said to be at the anterior extreme of a rib cage. Their function is to give the ribcage a flexible structure and connect the ends of the ribs to the sternum. Respiratory cartilages are present in the Trachea and are responsible for flexible inhalation and exhalation thereby reinforcing airways and providing support to the structure of the nose.

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how does lipases contribute to homeostasis

Answers

Answer:

The presence of the cholesterol and short lipid tails keeps the cell membrane fluid, allowing the passage of necessary materials across its layer. This one major mechanism helps the cell with the maintenance of homeostasis.

Explanation:

what are most enzymes in living things made up of?

Answers

Answer:

proteins

Explanation:

Enzymes are biological catalysts that speed up the rate of biochemical reactions in living cells. Most enzymes are made up of proteins.

the three main types of scientific investigations are descriptive, comparative, and experimental. Which components are included in all three types of investigations?

Answers

Answer:

testing a hypothesis

Explanation:

at the end of glycolysis the carbons of glucose are converted to

Answers

Glycolysis. In glycolysis, glucose—a six-carbon sugar—undergoes a series of chemical transformations. In the end, it gets converted into two molecules of pyruvate, a three-carbon organic molecule.

PLEASE HELP ME ASAP I NEED HELP

Answers

Answer:

Image result for plastic wrap for sandwiches

All you'll need is parchment or waxed paper and, if you're working with a hot sandwich or planning to slice the sandwich Explanation:

the molecular interaction described as a cross bridge involves the binding of which two proteins?

Answers

The answer is A and c

how does the inclusion of cholesterol affect animal cell membranes?

Answers

Answer:

juiuiuiuiuiuiuiuiuiuiuiuiuih0[niiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiijuj

Explanation:

What macromolecules are these??

Answers

Answer:

protiens . carbohydrates. nucliec acid And lipids

Answer:

Right one is glucose, left one is unknown to me sorry

Explanation:

you can always tell the genotype by looking at the phenotype. true or false?

Answers

False is the correct answer

What is photosynthesis?​

Answers

Answer:

it's a good question well photosynthesis is a process in which plants absorb the sun light and convert it to energy to prepare Thier food.

Photosynthesis is a process by which plants and other organisms, such as algae, convert solar energy into chemical energy and use it to produce organic molecules. Photosynthesis is the main source of energy in the biosphere.

Select *ALL* the correct answers. I'll give brainlist if you can answer this correctly.

Scientists studied the evolution of horses. They concluded that horses evolved with the emergence of grasslands and an increase of predators. The digits of their early Eocene ancestor evolved into hooves. The diet changed from foliage to grasses. The molar teeth developed and became stronger. Which statements are supported by this evidence?

A) Molars became bigger to fit into the jaw structure of modern horses.


B) The molars of the horses underwent changes so they could chew meat.


C) The digits were modified to enable the horses to graze better on hard, rocky surfaces.


D) The emergence of grasslands over time led to the development of strong molar teeth in horses.


E) The digits of the horses’ feet underwent modifications, enabling them to run faster from predators.

Answers

No sé, ¿es D y E? No estoy 100% seguro

salamat sapoints you have any questions

Transcription is the process by which the
information in a strand of DNA is copied
into a new molecule of messenger RNA.
Which of these are the steps involved in
transcription?

Answers

Answer:

1. initiation

2. elongation

3. termination

production of red blood cells is regulated by a hormone secreted from cells in the

Answers

Answer:....cells in the hormone erythropoietin (EPO) I think I’m not rly good with this I’m just helping

Explanation:

Answer:

Red blood cell (RBC) production (erythropoiesis) takes place in the bone marrow under the control of the hormone erythropoietin (EPO). Juxtaglomerular cells in the kidney produce erythropoietin in response to decreased oxygen delivery (as in anemia and hypoxia) or increased levels of androgens.

What was the first vertebrate to appear on Earth?

Answers

Answer:

Myllokunmingia

Explanation:

fish are the first vertebrates appeared roughly 480 million years ago

How do the
terms polymer and
monomer apply to the structure of
protein molecules?

Answers

A monomer is the main functional and structural unit of polymer

1. State Mendel's Law of Inheritance.

2. What are the two alleles for flower color in snapdragon?

3. State the Law of Non-Mendelian Inheritance in snapdragon.​

Answers

Answer:

1

Explanation:

he was able to find chromosomes in plants

Gregor Mendel's research on pea plants led him to the fundamental ideas of inheritance. He came to the conclusion that genes are inherited as distinct, paired units from each parent.

What is Non-Mendelian Inheritance?

Inheritance of features with a more complicated genetic base than one gene with two alleles and total dominance is referred to as non-Mendelian inheritance.

One allele may not always be dominant over another, resulting in a phenotype that falls between the two parents in certain people.

Incomplete dominance is the name given to this inheritance pattern. Snapdragon flowers, for instance, exhibit partial dominance.

When both alleles are present at the same time, this pattern of inheritance is referred to as partial dominance, since neither allele is totally dominant over the other.

Therefore, red and white snapdragons cross to produce exclusively pink progeny.

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stem cells in developing bone that give rise to osteoblasts are called:

Answers

osteoprogenitor and osteogenic good luck

Stem cells in developing bone that give rise to osteoblasts are called Osteoprogenitor cells.

What are Osteoprogenitor cells?

Osteoprogenitor cells are stem cells found in the developing bone that have the ability to differentiate into osteoblasts, which are the cells responsible for the formation and mineralization of bone tissue.

These cells are crucial for the development and growth of the skeleton and the maintenance of healthy bones throughout life. They also play a role in bone repair and regeneration following injury or disease. By giving rise to osteoblasts, osteoprogenitor cells help to ensure the proper development and maintenance of the skeletal system.

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What is meant by the specific gravity of wood?​

Answers

Answer:

Specific gravity is a term used in woodworking and construction that describes the density of wood compared to water.

Answer:

Specific gravity is a term used in woodworking and construction that describes the density of wood compared to water. The specific gravity of wood varies greatly between species and helps to determine which type of wood is ideal. ... Denser woods tend to swell and shrink more than less dense varieties.

Explanation:

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