NEET BIOLOGY

Detailed explanation-1: -arthropod, (phylum Arthropoda), any member of the phylum Arthropoda, the largest phylum in the animal kingdom, which includes such familiar forms as lobsters, crabs, spiders, mites, insects, centipedes, and millipedes . About 84 percent of all known species of animals are members of this phylum.

Detailed explanation-2: -Arthropods are members of phylum Arthropoda, one of the largest and most varied phyla. One aspect every member in the group has in common is the presence of an exoskeleton. These are hard outer shells made up mostly of chitin, though some arthropods also add calcium carbonate to make it even harder and stronger.

Detailed explanation-3: -The phylum Arthropoda contains a wide diversity of animals with hard exoskeletons and jointed appendages. Many familiar species belong to the phylum Arthropoda-insects, spiders, scorpions, centipedes, and millipedes on land; crabs, crayfish, shrimp, lobsters, and barnacles in water (Fig.

Detailed explanation-4: -They are by far the largest phylum of the animal kingdom. Roughly 80 percent of all animal species living on Earth today are arthropods. Obviously, arthropods have been extremely successful.

Detailed explanation-5: -In arthropods, chitin is used together with various proteins to form the exoskeleton which they all have in common. The Arthropoda are a very old group of organisms and appear about 550 million years ago very early in the fossil record.