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Depends on which arthropod you're getting at. Dragonflies, silverfish and cockroaches are pretty primitive as they haven't changed much since amphibians crawled onto the land, but butterflies, bees and stick insects are about dinosaur age, with leaf insects possibly being an even younger 'design'.All in all, every species has had equal time to evolve, and even species resembling the ancestral form (like dragonflies) have changed during all that time.
What else can I help you with?
Which of these has an exoskeleton arthropod worm vertebrate cnidarian?
An arthropod
What is arthropod vectors?
Vectors of the arthropod.
What happens to an arthropod's exo skeleton as the arthropod grows up?
As the arthropod grows up, the exoskeleton sheds in order for the arthropod to grow inside of it.
What is primitive arthropod?
Examples of primitive arthropods might include the trilobite, thought to have made an appearance in the pre-Cambrian period about 500 million years ago. The fossil record indicates they were highly diverse with well over 10,000 species and thrived for over 250 million years, but finally going extinct around the end of the Permian period. Another great example might be the Eurypterid or sea scorpion, a paleozoic arthropod believed to predate the earliest fish. Of those still alive, the peripatus (a genus of the velvet worms) would be a serious contender, primitive in origins and considered the simplest known arthropod, a 'living fossil' dating back 570 million years and thought to be a connecting link between the arthropods and annelids (segmented round worms, like the earthworm).
Which arthropod has no antenna?
The Blowjob arthropod family
Is a crab a mollusks or a arthropod?
A crab is an arthropod.
Which is more complex arthropod or annelida?
arthropod
Is a beetle a arthropod?
yes a beetle is an arthropod
Is a moth considered an arthropod?
Yes, a moth is considered to be an arthropod.
Is a mite a arthropod?
a mit is a arthropod because it has no back bone
Is a mouse an arthropod?
No. It does not have an external skeleton, which is one of the main characteristics of an arthropod.
Is a moth a arthropod?
yes, a moth is an arthropod. are you dumb or something man.
