| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | cetacean lung | marine biology research | Cetacean lungs are specialized for efficient oxygen exchange, allowing prolonged dives and underwater activity, according to marine biology research. | 3 |
| 2 | deep sea | marine biology research | The deep sea is a mysterious environment with unique and undiscovered species, making it a focus for marine biology research. | 3 |