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19 May, 10:59

The phylum Arthropoda includes four major lineages: 1. cheliceriforms (also called chelicerates) 2. myriapods3. insects and their relatives (together called hexapods) 4. crustaceansDrag each word or phrase to the appropriate bin.

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  1. 19 May, 13:40
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    Phylum Arthropod is the largest phylum which contain about 5-8 million animal species which are occupying 80% of the total living animal species.

    The main 5 sub phylum of arthropods are Trilobites, Chelicerates, Myriapods, Crustaceans, Hexapods.

    Explanation:

    Chelicerates-

    This group of arthropod includes spider, mites, horse shoe crab, tick etc

    The main characteristics of this group are presence of 6 pairs of appendages where 4 pairs are used for walking and two pairs are used as mouth parts. They lack mandible and antennae.

    Myriapods-

    Centipedes and millipedes are including this group which are quite similar with the worm like creature.

    They have round body with 2 pairs of legs on both the body segments and make burrow in the soil. They contain more than 20 legs, 1 pair of antennae, presence of tough exoskeleton which protects them from environmental hazards.

    Hexapods-

    The name is given as they contain 3 pairs of legs and body is divided into head, thorax and abdomen. They bear 1 pair of antennae and mandible as a mouth organ. The abdomen is 11 segmented and bear have reproductive organs. They may be with wing or without wings.

    Crustaceans-

    This group includes crabs, lobsters, crayfish etc are mainly free living or terrestrial, parasitic or sessile forms which contain 3 regions the head, thorax and abdomen which is covered by carapace and is protected by exoskeleton.
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