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 Claremont Colleges	fall	Y	4	25.00	100%	100%	50%
2024 ACF Fall at Cornell	fall	Y	9	21.11	100%	89%	22%
2024 ACF Fall at Rutgers	fall	Y	7	18.57	100%	57%	29%
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	10	18.00	100%	50%	30%
2024 ACF Fall at North Carolina	fall	Y	9	15.56	89%	44%	22%

Data


UCLA C	Claremont C	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
Columbia J	Lehigh B	10	10	0	20
Penn A	Lehigh A	0	10	0	10
Maryland A	NYU B	10	10	10	30
NYU A	Rowan A	0	10	0	10
Princeton A	Penn B	10	10	0	20
Columbia A	Bard A	10	10	10	30
CWRU A	Michigan C	0	10	0	10
CWRU B	CWRU C	10	10	0	20
Miami C	West Virginia A	10	10	0	20
Columbia B	Rutgers B	0	10	0	10
Michigan B	Ohio State C	0	10	0	10
Michigan A	Michigan D	10	10	0	20
Jefferson County Scholars	Michigan State A	10	10	0	20
Ohio State B	Michigan State B	10	10	0	20
Miami A	West Virginia B	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
UBC A	UW Wrath	10	10	0	20
UW Sloth	Arizona State A	0	10	0	10
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
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
VCU	Appalachian State B	0	10	0	10
UNC B	Duke A	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