Adisease breaks out among sheep in california. a scientist takes blood from the sheep and grows a previously unknown organism. that organism is then injected into a healthy sheep. the healthy sheep becomes sick with the same symptoms as the original sheep and dies. that sheep's blood is then cultured, and the original organism is isolated. this applies the principles of
a) spontaneous generationb) koch's postulatesc) epidemiologyd) vaccination

The correct answer is b) Koch's postulates

Explanation:

Koch has given some postulates which determine whether a particular bacteria is a cause of a particular disease or not. The Koch postulates are as follows :

1. In every disease bacteria(microbe) is present.

2. This bacteria can be isolated from the host and can be grown in a pure culture.

3. This pure culture of bacteria if injected in a healthy host then it will cause that specific disease in the healthy host.

4. The bacteria can be recovered from the host again.

Therefore in the given question, Koch principles are applied.

measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.