1.

Which one of the following is a matching set of the class and some of its main distinguishing features

A. Sporozoa - Infection by sporozoites, transmision by intermediate host and a contractile vacuole
B. Trematoda - Well developed suckers, flat unsegmented body
C. Arachnida - 3 pairs of legs, chitinous exoskeleton and poisonous sting
D. Insecta - Compound eyes, segmented body and nephridia
Answer» C. Arachnida - 3 pairs of legs, chitinous exoskeleton and poisonous sting


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