There are two subgroups of Nematodes:•_________ nematodes – one host to complete life cycle•_________ nematodes – multiple hosts to complete life cycle
1 intestinal2 tissue
The two subgroups of Nematodes are:
1. Monoxenous nematodes – These are nematodes that have only one host to complete their entire life cycle. They can be either free-living or parasitic. Some examples of monoxenous nematodes include Caenorhabditis elegans, which is a well-studied model organism in genetics and developmental biology, and Trichinella spiralis, which is responsible for causing trichinosis in humans.
2. Heteroxenous nematodes – These are nematodes that require multiple hosts to complete their life cycle. The intermediate host is often an invertebrate, such as an insect or mollusk, while the definitive host is usually a vertebrate, such as a mammal or bird. Some examples of heteroxenous nematodes include Onchocerca volvulus, which causes river blindness in humans and requires black flies as intermediate hosts, and Dirofilaria immitis, which causes heartworm in dogs and requires mosquitoes as intermediate hosts.
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