Section B: Science 16. do not have backbones. (A) Invertebrates (B) Vertebrates (C) Reptile (D) Worms रीढ़ की हड्डी नहीं है। (A) अकशेरुकी (B) रीढ़ (C) साँप (क) कीड़े 17. system circulates blood around the animal body and consists of heart, veins and arteries. (A)Skeletal system (B) Circulatory system (C) Nervous system (D) Respiratory system
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(A) Invertebrates.
(B) Circulatory System.
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