Question

Define phylum nematode
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Answer 1

Explanation:

The nematodes or roundworms constitute the phylum Nematoda, with plant-parasitic nematodes being known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments.

Scientific name: Nematoda

Higher classification: Ecdysozoa

Rank: Phylum

Phylum: Nematoda; Diesing, 1861

Kingdom: Animalia

Subkingdom: Eumetazoa

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Answer 2

Answer:

Nematodes :-

Nematohelminthes or nematodes commonly called round worm .They are grouped under super phylum Ascheshelminthes.

characteristics:-

These are aquatic or terrestrial on habitat & found in free living or parasitic form .

Body is elongated, cylindrical,unsegmented worm like having bilateral symmetry with tapering two ends .

Body is triploblastic with organ system grade of organization .

True coelom is absent ( pseudocoelom)

No cilia,no circulatory and respiratory system.

Digestive system complete with anus .

Respiration is anaerobic as well as aerobic.

Excretory system simple without flame cell.

They are dioecious ( sexes are not separated) with sexual dimorphism .

Fertilization is internal and development is direct