Which group of animals from the options below belong to the Phylum Arthropoda, based on their characteristic features like jointed appendages, exoskeleton and bi- or tri-segmented body?
Lobster, crab and spider.
Lobster, crab and spider belong to Phylum Arthropoda, with characteristic features like jointed appendages, exoskeleton, and a 2 or 3 segmented body (this refers to fused segments or tagmata such as the head, thorax and abdomen).