18 Questions
What type of host acts as a bridge between the intermediate host and the definitive host?
Paratenic host
Which type of host cannot progress the life cycle development of the parasite?
Dead-end host
What is the term used for a symbiotic relationship where both organisms benefit from each other's existence?
Mutualism
In the context of parasite-host relationships, what is an example of a dead-end host for the Japanese encephalitis virus?
Humans
What is the primary role of a paratenic host in a parasite's life cycle?
To carry the parasite without allowing it to develop further
Which type of symbiotic relationship involves one organism benefiting and the other being unaffected?
Commensalism
What is the main difference between parasitism and commensalism?
In parasitism, the host is harmed, whereas in commensalism, the host is neither helped nor harmed.
What is the primary purpose of adaptations in parasites?
To maximize benefit from the environment
Why do endoparasites usually lack feeding organs?
They feed directly on host tissues.
Which statement best describes the impact of parasitism on the host?
The host is harmed due to the parasite benefiting from the relationship.
What is a common characteristic of commensals in symbiotic relationships?
They neither help nor harm the host.
Why do endoparasites often have highly reduced or absent locomotory organs?
To prevent damage to host tissues during movement.
What type of parasites live on the surface of the host's body?
Head louse and blood-sucking fleas
Which parasite has attachment organs like rostellum, hooks, or suckers to connect securely to the host's organs?
Fasciola
Which parasite has a highly muscular pharynx for easy absorption of food materials from the host?
Ascaris
What type of parasite lives in the interior of the host's body, in the blood, tissues, body cavities, and other organs?
Entamoeba
Which parasite leads a parasitic condition throughout its entire life cycle?
Head louse
Which term describes organisms that can live either a parasitic or non-parasitic existence depending on opportunity?
Facultative parasite
Test your knowledge on different types of host interactions in parasitism. Explore concepts such as definitive hosts, paratenic hosts, and incidental hosts through examples like lizards acting as paratenic hosts for Spirocera lupi in dogs.
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