Parasite (not sure though)
Parasites
An organism that lives on or in a host and harms it is usually called a parasite. When the relationship mutually beneficial instead of harmful, it is called a symbiote.
This is the host (organism) and the cell is called the host cell.
A parasite is an organism that lives in or on a host cell. Parasites rely on the host for nutrients and can cause harm to the host they live in. Examples include Plasmodium, the parasite that causes malaria, and tapeworms.
parasite is the organism that lives on other organism without any benefit to the host.
A host is an organism that the parasite lives on. In other words the parasite may use the host's resources in a negative way. For example: A tick living off the blood of a human. The tick is the parasite and the human is the host. The tick lives off the blood of the human.
Bacteria that invade a host organism and obtain nutrients from the host's cell are pathegonic bacteria.
Parasite
An external parasite is an organism that lives on another organism. The external parasite depends on its host for food and shelter while the host is usually harmed.
virus is a non cellular it require to reproduce the materials of their host cell and they have those material on their structure which is harmful for the host cell.
A host organism provides a habitat for a parasite, allowing it to live, feed, and reproduce at the expense of the host's own resources and well-being. The relationship between a parasite and its host is often harmful to the host organism.
Parasitic.