What is the outer part of an arthropod called?

What are the disadvantages of mosquito repellent? What wouid happen if there were no decomposers in a food web or food chain? Is a bee incomplete metamorphsis? What does a common house spider look like? Where do praying mantis go in the winter? What type of behavior do orb spiders exhibit when building their webs? Waxy structure in a bee hive? Do white tailed spiders live in north America? What are snail antennas called? How are porifera considered? What is the phobia of butterflies? When earthworms add their wastes to the soil then die and decay this contributes to? Are squids dangerous? What do jellyfish and sponges have that specialized venomous cells used for defense and to help capture prey? Can vegetarians eat earth worms? How big is a portia spider? Do starfish rip themselves apart on purpose? How do you keep a snail you found in a garden in a shoebox and make it live? Can honey make you sick? What is the hole on the side of a slug?