Phylum Nematoda- characteristics, classification, examples

Phylum Nematoda

Nematoda Definition Nematodes (Gr., nema thread+ eidos, form) are commonly referred to as non-segmented roundworm, threadworm or pinworm, as distinct from flatworm and higher segmented annelids. Image Source: Wikipedia Phylum Nematoda Characteristics They are widely distributed, aquatic or terrestrial, parasitic or free-living. Their body is elongated, cylindrical, unsegmented, worm-like, bilaterally symmetrical and tapering at both ends. They are triploblastic animals …

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Characteristics of Invertebrates with examples

Characteristics of Invertebrates

Habitat They are found in seas, freshwater, air, land from snow to desert. 80% are found in terrestrial habitat. Most successful invertebrates of the lands are Arthropods. Protozoans are free-living, parasites or commensals. Sponges and Coelenterates are aquatic animals. Numerical Strength Among 1.25 million animal species, 95% (1.2 million) are invertebrates. Among 1.2 million invertebrates, 1 million are Arthropods. Shape …

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