Question

Jointed appendages are characteristic of the phylum
A. Echinodermata
B. Annelida
C. Mollusca
D. Arthropoda

Answer 1

Hint: In kingdom Animalia, each phylum is known by a characteristic feature. In some animals, appendages are developed to perform various functions. These are adapted to catch prey, swimming, and movement.

Complete answer: In animals of phylum Arthropoda jointed appendages are found and these are modified for various functions. (Arthos means joint and poda means appendages). This is the character of this phylum. Phylum Arthropoda is the largest phylum of the Animalia kingdom. The exoskeleton of these animals is made up of chitin. These are the most developed non-chordates. Class Insecta is the largest class of this phylum. Insects have three pairs of appendages as a characteristic feature.
-In animals of phylum Annelida, lateral appendages are found that are called parapodia. These help for movement in the water. For example, in Nereis parapodia are found.
-In animals of phylum Mollusca's body is covered by a mantle that is made of calcium carbonate. For movement, a muscular foot is found.
-In Echinodermata, tube feet are found which are related to its water vascular system and help in locomotion.
So, the right answer is option D.

Note: Phylum Arthropoda is classified according to the division body. Class Arachnida includes spiders, crustacea includes prawns, Insecta includes insects and Myriapods includes centipede and scolopendra.