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...General awareness mega quiz for ssc chsl solutions s ans a sol the skin is largest organ of body with total area about square feet protects us from microbes and elements helps regulate temperature permits sensations touch heat cold c sperm whale physeter macrocephalus toothed whales males growing up to metres in length mass ranges between kg females only weight echidnas sometimes known as spiny anteaters belong family tachyglossidae monotreme order egg lying mammals four extinct species together playtypus are surviving members that lay eggs their diet consists ants termites but they not closely related true america live australia new guinea crabs belongs phylum arthropoda d an octopus cephalopod mollusc octopoda also knows devil fish it has two eyes pairs arms like other cephalopods bilaterally symmetric b invertebrate animals do have backbone colossal squid maximum size metre class crab malacostraca mite arachnida scorpion there chemical forms vitamin namely referred ergocalciferol ch...