pheromones - 2025 ACF Fall

Question

Acrasins are a class of these compounds that trigger an aggregation response to form a single-cell plasmodium. For 10 points each:

[10m] Name these compounds. When attacked by predators, insects may release one of these chemical signals to alarm others to the threat.

ANSWER: pheromones [accept aggregation pheromones; accept alarm pheromones; reject “hormones”]

[10h] Acrasins are pheromones used by the “cellular” type of these amoeboid (“uh-MEE-boid”) organisms. When placed in a maze with a food source, these organisms find the shortest path by using their network of pseudopods.

ANSWER: slime molds [accept cellular slime molds or dictyostelids or Dictyostelia or Dictyosteliomycetes; accept P. polycephalum or Physarum polycephalum; reject “molds” or “water molds”]

[10e] Despite their name, slime molds do [emphasize] not belong to this taxonomical kingdom under which most other molds are classified. This kingdom also contains yeasts and mushrooms.

ANSWER: Fungi [or funguses]

<Editors, Biology>

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Summary


Northern California	Main	Y	4	20.00	100%	100%	0%
Southern California	Main	Y	7	24.29	100%	100%	43%
Eastern Canada (1)	Main	Y	5	22.00	100%	100%	20%
Eastern Canada (2)	Main	Y	9	22.22	100%	89%	33%
Florida	Main	Y	4	17.50	100%	75%	0%
Great Lakes	Main	Y	11	23.64	100%	100%	36%
Lower Mid-Atlantic	Main	Y	9	17.78	100%	56%	22%
Upper Mid-Atlantic	Main	Y	12	21.67	100%	92%	25%
Midwest	Main	Y	9	25.56	100%	100%	56%
North	Main	Y	4	22.50	100%	100%	25%
Northeast	Main	Y	12	21.67	100%	92%	25%
Pacific	Main	Y	8	20.00	100%	75%	25%
South Central	Main	Y	7	22.86	100%	86%	43%
Southeast	Main	Y	13	23.08	100%	92%	39%
UK (North)	UK	Y	5	22.00	100%	100%	20%
UK (South)	UK	Y	8	25.00	100%	88%	63%
Upstate NY	Main	Y	5	26.00	100%	100%	60%

Data


Berkeley Archer Queen	Berkeley Boss Bandit	10	0	10	20
Stanford B	Berkeley Mighty Miner	10	0	10	20
Berkeley Skeleton King	Stanford A	10	0	10	20
Berkeley Little Prince	UCSC	10	0	10	20
UCLA B	Claremont A	10	10	10	30
UC Irvine	UCLA E	10	0	10	20
UCSD A	UCLA A	10	10	10	30
UCLA D	UCSD B	10	10	10	30
Claremont B	USC A	10	0	10	20
UCLA F	UC Santa Barbara	10	0	10	20
USC B	Claremont C	10	0	10	20
McGill A	Ottawa A	10	0	10	20
McGill B	McGill C	10	0	10	20
Carleton B	McGill E	10	10	10	30
Ottawa D	Ottawa B	10	0	10	20
Ottawa C	Carleton A	10	0	10	20
Toronto I	Brock A	0	0	10	10
Guelph A	McMaster B	10	10	10	30
Queen's A	McMaster C	10	0	10	20
Toronto B	Toronto D	10	0	10	20
Toronto G	Waterloo C	10	0	10	20
Toronto F	Toronto H	10	0	10	20
Waterloo A	Toronto C	10	0	10	20
Waterloo B	Toronto E	10	10	10	30
Toronto A	McMaster A	10	10	10	30
South Florida A	ERAU Daytona A	10	0	10	20
Florida Tech A	Florida A	10	0	10	20
UCF A	Florida B	0	0	10	10
Florida Tech B	Florida State A	10	0	10	20
CWRU A	Michigan D	10	0	10	20
CWRU B	CWRU C	10	10	10	30
Michigan State D	Kentucky	10	0	10	20
Louisville A	Louisville B	10	0	10	20
Ohio State D	Louisville D	10	0	10	20
Michigan C	Louisville C	10	10	10	30
Michigan State B	Ohio State C	10	0	10	20
Michigan A	Michigan State C	10	10	10	30
Ohio State B	Pittsburgh	10	0	10	20
Ohio State A	WVU B	10	10	10	30
CWRU D	Michigan State A	10	0	10	20
Duke A	William & Mary B	0	0	10	10
Liberty C	JMU B	10	0	10	20
NCSU A	Virginia Tech B	10	10	10	30
William & Mary A	UNC A	0	0	10	10
UNC C	UNC D	0	0	10	10
VCU A	Virginia Tech C	10	10	10	30
Virginia Tech A	Virginia A	10	0	10	20
JMU A	William & Mary C	10	0	10	20
NCSU B	Tusculum A	0	0	10	10
George Mason C	Stony Brook	10	0	10	20
Columbia A	Johns Hopkins	10	0	10	20
Lehigh B	NYU C	10	0	10	20
Lehigh A	Maryland C	10	0	10	20
NYU A	George Mason B	10	10	10	30
Penn	Vassar B	10	0	10	20
Princeton	Maryland A	10	10	10	30
Rowan	Columbia B	10	0	10	20
Vassar A	Rutgers A	10	0	10	20
Maryland B	Rutgers B	10	0	10	20
Rutgers C	NYU B	0	0	10	10
George Mason A	Rutgers D	10	10	10	30
WashU Grizzlers	Chicago B	10	10	10	30
Illinois Canada	Illinois Blue	10	10	10	30
Illinois Champaign	William Woods University A	10	10	10	30
Purdue C	Illinois Orange	10	10	10	30
Iowa A	Illinois Urbana	10	10	10	30
Purdue B	Indiana A	10	0	10	20
Indiana B	Chicago A	10	0	10	20
Iowa B	Purdue D	10	0	10	20
Rose-Hulman A	WashU Grolars	10	0	10	20
Michigan Tech	Minnesota	10	0	10	20
Iowa State	St. Thomas	10	0	10	20
Wisconsin A	Macalester	10	10	10	30
Wisconsin C	Wisconsin B	10	0	10	20
Amherst A	Williams B	10	0	10	20
Tufts B	Boston College A	10	10	10	30
Vermont A	Boston College B	10	10	10	30
Brandeis Beethoven	Boston University B	0	0	10	10
Vermont B	Brandeis Mozart	10	0	10	20
Tufts C	Brown A	10	0	10	20
Dartmouth A	Amherst B	10	0	10	20
Boston University A	Dartmouth B	10	0	10	20
Dartmouth C	MIT B	10	0	10	20
Tufts A	UConn A	10	0	10	20
Williams A	Southern Connecticut State University A	10	0	10	20
Williams C	Brandeis Bach	10	10	10	30
Arizona State A	British Columbia C	10	0	10	20
Boise State	Washington Sockeye	0	0	10	10
British Columbia A	Washington Atlantic	10	0	10	20
British Columbia B	Alberta A	10	0	10	20
Texas	Arizona State B	10	0	10	20
Washington Chinook	Washington Coho	10	0	10	20
Alberta B	Washington Masu	10	10	10	30
Washington Pink	Washington State	0	10	10	20
Central Oklahoma B	Rose State	10	0	10	20
Harding	Kansas State A	10	0	10	20
Tulsa B	Kansas State B	10	10	10	30
Murray State College B	Nebraska A	10	10	10	30
Murray State College A	Nebraska B	0	0	10	10
Nebraska C	Tulsa A	10	0	10	20
Oklahoma	Central Oklahoma A	10	10	10	30
Alabama A	Clemson A	0	0	10	10
Auburn B	Tennessee Tech	10	10	10	30
Vanderbilt B	Auburn C	10	10	10	30
Tennessee B	Clemson B	10	10	10	30
Clemson C	Montevallo	10	0	10	20
Georgia Tech F	Emory A	10	0	10	20
Georgia Tech E	Georgia A	10	10	10	30
Georgia Tech A	South Carolina A	10	0	10	20
Georgia Tech B	Auburn A	10	10	10	30
Sewanne	Georgia Tech D	10	0	10	20
Georgia Tech C	Tennessee A	10	0	10	20
Vanderbilt A	Chipola College	10	0	10	20
Vanderbilt C	Mississippi State A	10	0	10	20
Durham A	Durham B	10	10	10	30
Edinburgh A	Durham C	10	0	10	20
Durham D	Sheffield A	10	0	10	20
Edinburgh C	Sheffield B	10	0	10	20
York	Edinburgh B	10	0	10	20
Cardiff	Bristol	10	10	10	30
Cambridge A	Southampton	10	0	10	20
Birmingham	Cambridge C	0	0	10	10
Oxford	Cambridge E	10	10	10	30
Cambridge D	Imperial A	10	10	10	30
Cambridge B	Imperial C	10	10	10	30
Imperial B	Imperial D	10	10	10	30
Warwick	LSE	10	0	10	20
Binghamton A	Cornell D	10	0	10	20
Cornell B	Binghamton B	10	10	10	30
Cornell A	Cornell C	10	0	10	20
RIT B	ESF	10	10	10	30
RIT A	Rochester	10	10	10	30