Four characters ( a -.d) are given below . Which two are CORRECT about phylum arthropods ?
(i) it is the largest phylum of animal kingdom .
(ii) one third of all named species on earth are arthropods.
(iii)They are bilaterally symmetrical , triploblastic and segmented animals .
(iv) The body is covered by calcareous exoskeleton.
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Explanation:
(i) and (iv) are correct
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