Which term refers to harmful organisms that have adapted to living inside a host body?

Which term refers to harmful organisms that have adapted to living inside a host body?

• A. Parasites
• B. Pathogen
• C. Personal Hygiene Program
• D. Pest Control Operator (PCO)

Answer: (A)

Parasites describe organisms that live in or on a host and rely on the host for nourishment, often causing harm in the process. When these organisms have adapted to living inside the host body, they become endoparasites, such as intestinal worms or protozoans, shaping their biology around surviving within the host’s tissues or organs. This close, dependent relationship is exactly what the term conveys. A pathogen is a disease-causing agent, like a virus or bacterium, and while many pathogens can be parasites, the focus here is on the living inside relationship, which is characteristic of parasites. The other options aren’t related to biological organisms living in hosts.

Parasites describe organisms that live in or on a host and rely on the host for nourishment, often causing harm in the process. When these organisms have adapted to living inside the host body, they become endoparasites, such as intestinal worms or protozoans, shaping their biology around surviving within the host’s tissues or organs. This close, dependent relationship is exactly what the term conveys.

A pathogen is a disease-causing agent, like a virus or bacterium, and while many pathogens can be parasites, the focus here is on the living inside relationship, which is characteristic of parasites. The other options aren’t related to biological organisms living in hosts.