The Crustaceans That Are Sessile and Enclosed in a Shell

Q46: The ancestral winged insect gave rise to

Q47: The Acari<br>A)have a distinct head,thorax,and abdomen.<br>B)are of

Q48: The respiratory system in insects consists of

Q49: _ form the basis of the excretory

Q50: The first pair of walking legs of

Q52: Diversity in arthropods is mainly due to

Q53: A genetically programmed or environmentally induced arrest

Q54: Members of the class Arachnida have<br>A)a cephalothorax

Q55: Crustaceans<br>A)are mainly marine,but there are freshwater and

Q56: _ is currently the most common arthropod-borne