echolocation - 2024 ARCADIA

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>

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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%
2024 ARCADIA at Claremont	2024-11-02	N	3	20.00	100%	100%	0%

Data


Brandeis A	BU	10	0	0	10
Bowdoin B	Boston College B	10	0	0	10
Brandeis B	Bowdoin A	10	10	0	20
Clark House	Amherst	10	10	0	20
Tufts A	Harvard	10	0	0	10
MIT	Clark Wilson	10	10	0	20
Tufts B	Boston College A	10	0	0	10
Yale	Bowdoin C	10	0	0	10
Virginia Tech B	North Carolina A	10	10	0	20
Virginia Tech C	North Carolina B	10	10	0	20
Virginia Tech A	South Carolina	10	10	0	20
Squidward Community College	Missouri	10	10	0	20
Truman	WashU	10	10	0	20
ASU->Stanford->ASU pipeline	Social credit go vroom	10	10	0	20
In the Mood for Buzz	bingy academy	10	10	0	20
she limp on my waltz till i feel pathetique	Madmen and Specialists	10	10	0	20
Paddington in Peru (2024)	The cult of SGA	10	0	0	10
Toyota Tundra Turbos — Twisting Truths - Tackling Trivia - Taming Titans	Old and Young	10	0	0	10
Penn State	Maryland	10	10	0	20
RIT	Pitt	10	0	0	10
Florida Tech	UCF B	10	10	0	20
UCF A	UF A	10	0	10	20
UF C	UF B	10	0	0	10
Valencia	USF	10	0	0	10
Berkeley B	Berkeley A	10	10	0	20
Stanford	Berkeley Past	10	0	0	10
McGill A	Carleton A	10	0	0	10
McMaster ApocolocyntosisBidii	Toronto Metropolitan A	10	10	0	20
Toronto B	Toronto A	10	10	0	20
Waterloo Cloze	Toronto Chestnut Rice and Kamehameha	10	0	0	10
Waterloo Aspidistra	Waterloo Basic	10	10	0	20
Georgia Tech A	Mississippi State	10	10	0	20
Georgia Tech D	Johns Creek	10	0	0	10
Georgia Tech C	Innovation Academy A	10	0	0	10
Innovation Academy C	Lambert	10	0	0	10
Innovation Academy B	Milton	10	0	0	10
Chicago A	Purdue B	10	10	0	20
Notre Dame	Illinois Blue	10	0	0	10
Chicago B	Purdue A	10	10	0	20
Illinois Orange	SIUE	10	0	0	10
Imperial B	Cambridge B	10	10	0	20
LSE A	Warwick C	10	10	0	20
Southampton	Cambridge A	10	0	0	10
Imperial A	Warwick A	10	10	0	20
Warwick B	LSE B	10	10	0	20