What is molting?
The process of shedding an exoskeleton and replacing it with a new one.
What is the cephalothorax?
The anterior part of an arthropod body, consisting of a head and thorax fused together.
What is a Dorsal nerve chord?
A long bundle of nerves cells located along the dorsal part of an organism's body
What is a mollusks foot used for?
Locomotion, anchoring and obtaining food
What is a cephalopod and give in example?
"head-foot" octopus, squid, cuttlefish
What s the common name for a gastropod, and what does gastropod mean?
Snails, Stomach-foot organisms, (coiled body organs sitting on a large muscular foot)
What kind of symmetry do echinoderms have?
radial-pentamerous
What does a sea cucumber use as a method of defense?
It eviscerates some of it's organs, and ejects them to distract an enemy while it gets away?
What does a sea urchin have to help it process hard to digest algae and sea grasses?
A long coiled gut (so do sea cucumbers, because they swallow sediment as they crawl along the ocean floor)
Why do arthropods molt?
They have a hard exoskeleton made of chitin, so they need to shed it and create a new one when they grow
What do cleaner shrimp and wrasse do?
They set up cleaner stations where they eat parasites and other organic material off of other fish. symbiotic Mutualism
