Question
Paleontologists can determine this trait based on the presence of calcium-rich medullary bone in the legs of extinct reptiles. For 10 points each:
[10h] Name this trait, which is also indicated by a baculum. This trait is easily identifiable in Confuciusornis fossils because enough of them remain to allow for population-level study.
ANSWER: sex [accept whether the fossil is male OR female; prompt on gender] (Medullary bone is a source of calcium during egg-laying.)
[10e] Due to their lack of sex-determining features, they/them pronouns are used to refer to Sue, the most complete fossil of this dinosaur. This large, stubby-armed dino preyed on Triceratops during the Cretaceous period.
ANSWER: Tyrannosaurus rex [or T-Rex]
[10m] Male and female dinosaurs can also have differently sized chevron bones, which connect the ventral sides of these bones in the tail. In humans, that group of these bones is fused in the coccyx (“COCK-six”).
ANSWER: vertebrae [prompt on spine or spinal column]
<KT, Biology>
Summary
| 2024 ARCADIA at BU | 2024-12-06 | Y | 7 | 14.29 | 100% | 14% | 29% |
| 2024 ARCADIA at Duke | 2024-12-06 | Y | 2 | 15.00 | 100% | 0% | 50% |
| 2024 ARCADIA at Missouri S&T | 2024-12-06 | Y | 2 | 20.00 | 100% | 100% | 0% |
| 2024 ARCADIA Online | 2025-05-17 | Y | 5 | 18.00 | 100% | 60% | 20% |
| 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% | 50% | 0% |
| 2024 ARCADIA at UC Berkeley | 2024-12-06 | Y | 3 | 23.33 | 100% | 67% | 67% |
| 2024 ARCADIA at Waterloo | 2024-11-09 | Y | 6 | 13.33 | 100% | 17% | 17% |
| 2024 ARCADIA at GT | 2024-12-06 | Y | 5 | 14.00 | 80% | 40% | 20% |
| 2024 ARCADIA at Illinois | 2024-11-09 | Y | 4 | 20.00 | 100% | 50% | 50% |
| 2024 ARCADIA at Warwick | 2024-12-06 | Y | 5 | 16.00 | 80% | 80% | 0% |
| 2024 ARCADIA at Claremont | 2024-11-02 | Y | 3 | 26.67 | 100% | 100% | 67% |
Data
| Milton | Georgia Tech C | 10 | 0 | 0 | 10 |
| Georgia Tech D | Georgia Tech A | 0 | 10 | 0 | 10 |
| Innovation Academy A | Mississippi State | 0 | 10 | 0 | 10 |
| Innovation Academy B | Innovation Academy C | 0 | 10 | 10 | 20 |
| Johns Creek | Georgia Tech B | 0 | 10 | 10 | 20 |