MCQOPTIONS
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| 1. |
The lungs in frogs are |
| A. | Compact spongy masses |
| B. | Thin-walled elastic, hollow bags |
| C. | Thick-walled nonelastic, hollow bags |
| D. | Thick-walled nonelastic solid masses |
| Answer» C. Thick-walled nonelastic, hollow bags | |