Question

the passage below describes a process of scientific inquiry. select the part of the passage that describes revising the hypothesis. hint: to revise the hypothesis, you use the results of the investigation to come up with a new explanation. carmen grew roses for a flower shop. one day, she noticed tumor - like growths on her rose stems. she read a book about plant diseases and learned that the plants had crown gall disease, which is caused by a type of bacteria. she also read that allicin, a chemical found in garlic, can kill bacteria. she was curious if garlic could prevent more tumors from forming on her plants. carmen sprayed garlic juice on ten infected plants and water on another ten. after one month, she compared the number of new tumors on plants in each group and found no difference between them. carmen thought that the concentration of allicin in her garlic spray might be too low, so spraying the plants with pure allicin would decrease the number of new tumors. she repeated her experiment, this time spraying the plants with a solution of pure allicin.

Explanation:

Revising a hypothesis uses investigation results to create a new explanation. Carmen's initial experiment with garlic juice showed no effect, so she developed a new explanation about allicin concentration being too low and proposed using pure allicin.

Answer:

Carmen thought that the concentration of allicin in her garlic spray might be too low, so spraying the plants with pure allicin would decrease the number of new tumors.