Crustaceans are primarily freshwater animals,but there are some marine and a few terrestrial species.
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Q15: Arthropods are similar to annelids in that
Q16: In complete metamorphosis,the sequence of instars is
Q17: Current molecular evidence indicates that Hexapoda and
Q18: Current molecular data suggests metamerism arose independently
Q19: Most species of insects have wings.
Q21: Scorpions
A)feed during the day.
B)are most common in
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
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