Answer:
(i)
These animals are bilaterally symmetrical and segmented.
(ii) Body is covered with chitinous exoskeleton.
(iii) One or two pairs of jointed legs are present.
(iv) The body cavity is blood-filled and is called
haemocoel.
(v) Body bears jointed appendages, and is divided into
head, thorax and abdomen.
(vi) Circulatory system is open, i.e., blood doesn't flow
in blood vessels.
Examples: Palaemon, cockroach and butterfly.
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