What is the similarities of arthropods?

Answer 1

Since arachnids are simply a subgroup of arthropods, all characteristics of arachnids are also an example of arthropod characteristics by definition (notwithstanding, all arthropods won't share specific arachnid characteristics).

Answer 2

Since all arachnids are arthropods, the characteristics are implicit (potentially regardless of what the properties might be). Arthropods (and one of their subgroups, arachnids) are characterized by segmented bodies, an exoskeleton made from chitin, and joint appendages.

Answer 3

Arthropods are characterized by segmented bodies, an exoskeleton made from chitin, and joint appendages. They also have an internal body cavity (hemocoel) and an open circulatory system which employs hemolymph.

Answer 4

have segmented body and also having exoskeleton

Answer 5

They are both commonly found fossils I believe.

Answer 6

They're both invertebrates (no backbone), but that's about it. Echinoderms are way more closely related to us vertebrates than to arthropods! :P

Answer 7

Arthropods are part of the group of animals that are called invertibrates. All invertibrates do not have vertibra.