The same, unknown bacteria is isolated from 20 sick individuals. Their samples were grown in culture and then placed in 10 healthy mice. Those mice started to show signs of a heightened immune response. According to Koch’s postulates what is the next step in determine whether the bacteria is pathogenic?
Classify the bacteria as a noncommunicable disease.
Classify the bacteria as a communicable disease.
Reisolate it, and determine if it is the original unknown bacteria.
Treat the original 20 individuals with antibiotics.

Reisolate it, and determine if it is the original unknown bacteria.

Explanation:

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 in 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.

explanation:

okay now i don't know this but for the pints nothing else to say bye

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.