Question

Which one of the following features is common in silverfish, scorpion, dragonfly and prawn?
A.Three pairs of legs and segmented body
B.Chitinous cuticle and two pairs of antennae
C.Jointed appendages and chitinous exoskeleton
D.Cephalothorax and trachea

Answer 1

Hint: An arthropod is an invertebrate animal with an exoskeleton, a segmented body, and joint legs that are paired. The phylum Euarthropoda, which includes insects, myriapods, arachnids, and crustaceans, is created by arthropods.

Complete answer:
First we should know about arthropods to answer this question. Arthropods are the member of phylum Arthropoda which is the largest phylum in the kingdom of animals, containing such common forms as lobsters, crabs, spiders, mites, worms, centipedes, and millipedes. About 84 percent of all recognised animal species are part of this phylum. In any ecosystem on Earth, arthropods are represented and display a great range of adaptations. In aquatic environments, some forms live, while some exist in terrestrial ones; several classes are also modified for flight.
Now, let us find the solution from the options-
All are arthropods: silverfish, scorpion, dragonfly and prawn. They are distinguished by joint appendages and chitinous exoskeleton is a rough, semi transparent material that is the major feature of arthropod exoskeletons, like crustacean shells and insect outer coverings.
Not all arthropods have three pairs of legs, others have four pairs of legs, like arachnids, some arthropods have no antennae, and only in arachnids, like spiders have cephalothorax. The procuticle is considered a major chitinous layer of the cuticle. The procuticle is found in most land Arthropoda, especially insects that are externally covered with a waxy, thin, water-resistant outer layer that contains no chitin. Thus, the options A, B, and D are incorrect.

Hence, the correct answer is option (C)

Note: The distinguishing characteristic of arthropods is the existence of a protein-bound joint skeletal cover consisting of chitin (a complex sugar). The underlying epidermis secretes this nonliving exoskeleton. Even in the larval stages, arthropods lack locomotory cilia, presumably because of the exoskeleton's existence. The body is normally segmented, and the segments hold paired jointed appendages where the term arthropod ("jointed feet") is named.