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Write about phylum aschelminthes
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Aschelminthes is classified into two classes: Aphasmidia and Phasmidia.
Class 1. Aphasmidia:
(i) Phasmids are absent,
(ii) Amphids are of various types. Examples: Trichinella, (Trichina worm), Trichuris (Whip worm), etc.
Class 2. Phasmidia:
(i) Phasmids are present near hind end of body,
(ii) Amphids are present near anterior end.
Examples: Ascaris (Giant intestinal round worm), Enterobius (Pm worm), Ancylostoma (Hook worm), Wuchereria (Filarial worm), etc.
Rhabditis:
This genus includes free living and semi-parasitic forms. Rhabditis maupasi lives in soil. The male has copulatory bursa at the posterior end of the body.
deepsen640:
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Phylum Aschelminthes. Aschelminths can be free-living or parasitic. The free-living organisms are extremely abundant in soils and sediments and they feed on bacteria. While some others are plant parasites and can cause disease in crops that are economically important.
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Ashelminthes
the body of the ashelminthes is circular in cross section ,hence the name roundworms.
- they may be freeliving,aquatic and terrestrial or prasitic in plants and animals.
- organ system level of body organisation
- they are bilaterally symmetrical ,trophoblastic ,and pseudocoelomate animals
- sexes are separate
- fertilisation is internal
- examples;: Ascaris (round worm) ,Ancylostoma (hookworm) etc
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