Biology Questions and Answers
Concepts of
Parasitism
- What is parasitism?
Parasitisminterspecific ecol is an inharmoogical interaction innious (^)
which individuals of a species (the
parasites)cells of individuals of explore organs, tissues o another speciesr (^)
(the hosts) causing harm to these.
- What is the difference
between ectoparasite and
endoparasite?
Ectoparasites are parasites that explore
the external surexample, mites that parasite thface of the host (like, fore skin).
Endoparasites are parasites that live
within taenias).the body of the host (like the
- Concerning the number of
hosts how are parasites
classified?
Parasitescalled monoxenous p that require only one host ararasites. Parasitese
that need more than one host for theirlife cycle are called heteroxenous
parasites.
- What is the criterion used
to classify hosts as
intermediate hosts or as
definitive hosts?
The criterion usintermediate hosts or ed to classifyas definitive h hosts asosts (^)
is the kind of reproduction oparasite, sexual or asexual, withif the (^) n the
host. The host within which the sexual
reproduction stage ooccurs is the definitive host. Tf the parasitehe host (^)
within which the asexual reproduction
stage of the parasite occurs is thintermediate host. e
- What are vectors of
parasites?
Vectors of a parasiteto transport the parasite d are organisms ableuring stages
of its life cycle mother hosts. For examediatinple, the mosquitog the infection o f
Aedes aegypti is the vector of the
dengue virus; triatomine bvectors of the Trypanosoma ugs arecruzi,
protozoan that causes Chagas’ disease;
mice are vectors of leptospira, bthat cause leptospirosis. acteria - What is an etiological agent
of disease?
An etiological agent of disease is thagent that causes the disease. It maye (^)
be a living benvironmental fact.eing, substance or
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