Fig. 1.1 presents a branching key for identifying the different types of crustaceans.
(a)[5]
Fig. 1.2 contains six crustaceans. Use the key in Fig. 1.1 to identify the six different crustaceans. Write the letters on the lines in Fig. 1.2.
(b)[2]
Crustaceans are one arthropod group. State the names of two other arthropod groups.
(c)[1]
Describe one way in which all vertebrates are different from arthropods.
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