KIDS TRIVIA

Detailed explanation-1: -In crustaceans and myriapods head and thorax are fused. Q. In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, the body is divided into head, thorax and abdomen?

Detailed explanation-2: -The Class arachnida is a large and diverse group. All arachnids belong to a subphylum (a division of Arthropoda) known as the Chelicerata, of which there are approximately 65, 000 described species ( 8, 000 in North America). They are characterized by having two body regions, a cephalothorax and an abdomen.

Detailed explanation-3: -In Arthropod animals the body consists of a head, thorax and abdomen. In Insects, head and thorax remain separate and are not fused together into Cephalothorax. These are characterised by an exoskeleton and joint appendages.

Detailed explanation-4: -The arachnids comprise the fourth class of arthropods, including spiders, ticks, mites, and scorpions. Arachnids have a fused head and thorax and have four pairs of legs.