Final answer:
A pathogen that is plantlike and typically does not cause infection in those with a healthy immune system is fungi. These can include conditions such as athlete's foot but are generally kept in check by a properly functioning immune response.
Step-by-step explanation:
The type of pathogen described as a plantlike microorganism that typically will not cause infection in a person with a normally functioning immune system is fungi. Like bacteria, viruses, and protozoa, fungi can cause a variety of infections in humans. However, in individuals with a healthy immune system, these infections are mostly uncommon as the immune system keeps such potential pathogens at bay. Fungal infections are more likely to occur in people with compromised immune systems, causing diseases such as athlete's foot or more severe systemic infections.