The Acari
A) have a distinct head,thorax,and abdomen.
B) are of economic and medical importance.
C) are called scorpions.
D) are all free-living.
Correct Answer:
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Q22: Crustaceans
A)breathe by means of tracheae.
B)excrete by means
Q23: Ecdysis (molting)in crustaceans
A)involves production of a new
Q24: The crustaceans that are sessile and enclosed
Q25: As the arthropod ancestors underwent "arthropodization,"
A)their circulatory
Q26: Spiders
A)feed on plant juices.
B)have six legs.
C)have chelicerae
Q28: The flight muscles of many species of
Q29: The class Insecta
A)has more species than any
Q30: Some examples of branchiopod crustaceans are the
A)water
Q31: The primitive larva in the Crustacea is
A)omitted
Q32: Insects differ from other arthropods because insects
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