Exam 20: Crustaceans

The major body space in arthropods is the

The green glands form an effective "flood control" device in the freshwater crayfish by

Most appendages of crustaceans are two-branched,or _____________________.

The most diverse class of crustaceans is the __________________.

Crustaceans have better-developed sense organs than do the annelids because they have _______ ________,delicate projections of cuticle distributed over the body,and especially the mouthparts.

The two joints of the protopod are the ______ ______ and medial endopod.

A small group of hermaphroditic crustaceans that is unique in discharging both eggs and sperm through a common duct is the

By lining up all the crayfish appendages,you would find that they possess

The first pair of walking legs in a crayfish,lobster,crab,and their relatives,that is enlarged with a terminal claw is the

Why are barnacles considered crustaceans when they are anchored in one place as adults?

The dorsal cuticle of the head of many crustaceans extends posteriorly to form a covering called the ___________________.

Marine crustaceans that are sessile,secrete calcareous plates and filter-feed are

The ancestral larval form of crustaceans is the __________.

The order that has been successful invading terrestrial environments is the

The tail fan of many malacostracans is

The segments of crustaceans are covered with a dorsal plate or _____________ and a ventral plate or ______________.

The procuticle of crustaceans is often impregnated with __________________.

The various specialized body structures along the body of Malacostracans are thought to be derived from a common biramous appendage,which suggests

A characteristic unique to Crustacea is the possession of two pairs of _______________.