A mysterious disease has struck 15 horses at a farm with 100 horses. Doctors at the animal hospital test the blood of five of the sick horses and find that four of them show a type of bacteria never seen before. Answer the following:
a. Based on this information, suggest a reasonable hypothesis for the cause of the disease.
b. Suggest one experiment you could do to provide evidence for or against your hypothesis.

The response I would give:

a. This new bacteria most likely caused this 'mysterious' disease, as both are unprecedented.

b. Test 5 more horses, and see whether they also carry this same new bacteria.

I'm sure there are more effective tests, like maybe grow the bacteria in a lab and test it on other creatures, but the question of animal cruelty then arises.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.