Given the question: Answer the following question given this paragraph: 22.3 Magnetic Fields and Magnetic Field Lines Magnetic fields can be pictorially represented by magnetic field lines, the properties of which are as follows: 1. The field is tangent to the magnetic field line. Field strength is proportional to the line density. Field lines cannot cross. Field lines are continuous loops. Q: An infection may be intracellular or extracellular, depending on this? Choices: - pollen - microbes - bacteria - pathogen A:
The answer is:
pathogen