science quiz 5

Arthropods with very hard, crusty, exoskeletons are what, classified in subphylum Crustacea.

Crustaceans differ from from insects in that their bodies are usually divided into only two distinct body regions: the what and the abdomen.

Over 10,000 species of what have been identified.

Although the entire body of a decapod is covered with an especially hard shell called the what, which provides armor plated protection for the decapod's vital organs.

A pair of what is on the underside of each segment of the abdomen.

A decapods whose abdomen generally does not extend beyond the carapace is the what.

What, sometimes called crawfish or crawdads, inhabit freshwater lakes, ponds, rivers, and streams on every continent except Africa and Antarctica

What are distinguished by having seven pairs of legs, with the first four pairs pointed forward and the last three pairs pointing backward.

What, which are found as plankton in both marine and freshwater environments, are very small; most grow to no more than 5 mm long.

The what are a group of small crustaceans with shortened antennae and leaf like legs.