_________________________ Form the Basis of the Excretory System of Spiders

Q44: When spiders mate,the male inserts his _

Q45: Some appendages of crustaceans are two-branched,or _.

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

Q50: The first pair of walking legs of

Q51: The crustaceans that are sessile and enclosed

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