trilobites - 2024 ACF Fall

Question

These organisms’ eyes possessed calcite lenses and were some of the first examples of compound eyes. For 10 points each:

[10m] Identify this class of extinct ancient marine arthropods. They contain a hard exoskeleton and have a body divided into three sections.

ANSWER: trilobites [or Trilobita]

[10e] Trilobites first evolved during this geological period where most extant animal phyla emerged. This geological period saw the rapid diversification of life in its namesake “explosion.”

ANSWER: Cambrian period [accept the Cambrian explosion]

[10h] Because of their wide distribution and sudden appearance, trilobites are often used as these types of standard fossils. These fossils are contrasted with zone fossil, which help determine a fossil’s biozone.

ANSWER: index fossils [accept guide or indicator fossils]

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Summary


2024 ACF Fall at Cornell	fall	Y	9	21.11	100%	89%	22%
2024 ACF Fall at Ohio State	fall	Y	8	17.50	100%	75%	0%
2024 ACF Fall at Washington	fall	Y	6	16.67	100%	67%	0%
2024 ACF Fall at Georgia	fall	Y	11	19.09	100%	55%	36%
2024 ACF Fall at North Carolina	fall	Y	9	15.56	89%	44%	22%
2024 ACF Fall at Claremont Colleges	fall	Y	5	26.00	100%	100%	60%
2024 ACF Fall at Rutgers	fall	Y	8	17.50	100%	50%	25%

Data


CWRU A (UG)	Michigan C	0	10	0	10
CWRU B (DII)	CWRU C (UG)	10	10	0	20
VCU	Appalachian State B	0	10	0	10
UNC B	Duke A	10	10	0	20
Miami C (DII)	West Virginia A (UG)	10	10	0	20
Michigan B (UG)	Ohio State C (DII)	0	10	0	10
Michigan A (UG)	Michigan D (UG)	10	10	0	20
Jefferson County Scholars (DII)	Michigan State A	10	10	0	20
Ohio State B (DII)	Michigan State B	10	10	0	20
Miami A (UG)	West Virginia B (UG)	10	10	0	20
Arizona State B	Alberta	0	10	0	10
UW Gluttony	Boise State	10	10	0	20
UW Greed	UW Lust	10	10	0	20
UW Pride	UBC B	10	10	0	20
UW Sloth	Arizona State A	0	10	0	10
UBC A	UW Wrath	10	10	0	20
UNC D	James Madison B	0	10	0	10
Liberty A	Virginia Tech A	0	10	10	20
Liberty C	Tusculum	0	0	0	0
Virginia Tech B	NC State	10	10	0	20
UNC A	Duke B	10	10	0	20
UNC C	Appalachian State A	10	10	0	20
William & Mary	Virginia	0	10	10	20
UCLA C	Claremont C	10	10	10	30
UCLA A	UCLA E	10	10	10	30
Claremont A	UCLA B	10	10	0	20
UCLA D	UCSD	10	10	10	30
USC	Claremont B	10	10	0	20
Binghamton A	RIT C	10	10	0	20
Binghamton B	Cornell E	10	10	0	20
Cornell C	Binghamton C	10	10	10	30
Cornell A	Cornell D	0	10	0	10
RIT A	Cornell B	10	10	0	20
Penn State	Cornell F	10	10	0	20
Cornell G	ESF	10	10	10	30
Syracuse	U of Rochester A	10	10	0	20
RIT B	U of Rochester B	10	10	0	20
Vanderbilt A	Alabama A	0	10	0	10
Georgia Tech B	Auburn C	10	10	0	20
Emory Oxford	Emory A	10	10	0	20
Georgia Tech A	Furman	10	10	10	30
Georgia Tech C	Belmont	0	10	0	10
Georgia Tech D	Tennessee A	10	10	0	20
Missisippi State	Georgia Tech B	10	10	10	30
Mississippi State A	Georgia Tech E	0	10	0	10
South Carolina B	Southern	10	10	10	30
Clemson B	Tennessee B	0	10	10	20
Vanderbilt B	Auburn B	0	10	0	10
Columbia A (UG)	Bard A (UG)	10	10	10	30
Columbia B	Rutgers B	0	10	0	10
Columbia J (DII)	Lehigh B (DII)	10	10	0	20
Fordham A	Maryland B (DII)	0	10	0	10
Penn A (DII)	Lehigh A (UG)	0	10	0	10
Maryland A (DII)	NYU B	10	10	10	30
NYU A (UG)	Rowan A (DII)	0	10	0	10
Princeton A (UG)	Penn B (DII)	10	10	0	20