What are the main characteristics of invertebrate animals?
I- They have an internal skeleton with a vertebral column.
II- They can perform movemen...
What are the main characteristics of invertebrate animals?
I- They have an internal skeleton with a vertebral column. II- They can perform movements and most are capable of moving. III- They have some more or less hard structure that serves as protection. a) Only I is correct. b) Only II is correct. c) Only III is correct. d) II and III are correct.
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