MCQOPTIONS
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				| 1. | 
                                    Sharks are killers of the deep seas. Which of the following are the characteristics of the sharks? | 
                            
| A. | They are bony. | 
| B. | They are cartilaginous. | 
| C. | They are mostly warm-blooded. | 
| D. | Gill slits are covered. | 
| Answer» C. They are mostly warm-blooded. | |