Question
Answer the following about sound underwater, for 10 points each.
[10e] Dolphins and other toothed whales have fatty “melons” on their foreheads to aid this process. Bats also use this process to navigate their surroundings using high-frequency calls.
ANSWER: echolocation [or biosonar or biological sonar; reject “sonar”]
[10m] Midshipman fish and other species contract muscles around this organ to hum. Outside of its main function, this air-filled organ enhances sound detection by transmitting oscillations to the inner ear via the Weberian ossicles.
ANSWER: swim bladder [or gas bladder, or air bladder, or fish bladder; accept fish maw; reject “bladder”]
[10h] The reflection of sound off the swim bladders of numerous midwater fish creates this region, which makes the ocean seem shallower than it is and fluctuates as fish vertically migrate throughout the day.
ANSWER: deep scattering layer [or DSL]
<AY, Biology>
Summary
| 2024 ARCADIA at BU | 2024-12-06 | Y | 8 | 13.75 | 100% | 38% | 0% |
| 2024 ARCADIA at Duke | 2024-12-06 | Y | 3 | 20.00 | 100% | 100% | 0% |
| 2024 ARCADIA at Missouri S&T | 2024-12-06 | Y | 2 | 20.00 | 100% | 100% | 0% |
| 2024 ARCADIA Online | 2025-05-17 | Y | 5 | 16.00 | 100% | 60% | 0% |
| 2024 ARCADIA at Penn State | 2024-12-06 | Y | 2 | 15.00 | 100% | 50% | 0% |
| 2024 ARCADIA at Florida Tech | 2024-12-06 | Y | 4 | 15.00 | 100% | 25% | 25% |
| 2024 ARCADIA at UC Berkeley | 2024-12-06 | Y | 2 | 15.00 | 100% | 50% | 0% |
| 2024 ARCADIA at Waterloo | 2024-11-09 | Y | 5 | 16.00 | 100% | 60% | 0% |
| 2024 ARCADIA at GT | 2024-12-06 | Y | 5 | 12.00 | 100% | 20% | 0% |
| 2024 ARCADIA at Illinois | 2024-11-09 | Y | 4 | 15.00 | 100% | 50% | 0% |
| 2024 ARCADIA at Warwick | 2024-12-06 | Y | 5 | 18.00 | 100% | 80% | 0% |
Data
| Squidward Community College | Missouri | 10 | 10 | 0 | 20 |
| Truman | WashU | 10 | 10 | 0 | 20 |