Bonus
According to recapitulation theory, the growth of this biological structure resembles the successive adult stages of an animal’s remote ancestors. For 10 points each:
[10e] Name this multicellular structure formed from a dividing zygote after a sperm fertilizes the egg. In humans, this structure implants itself in the endometrial lining and becomes a fetus nine weeks after conception.
ANSWER: embryos [prompt on blastocysts or blastulas or morulas or blastomeres]
[10m] Anatomical structures with similar embryonic origins may have this property if they share a common ancestor, despite serving different purposes. Primate arms and bat wings have this property, contrasted with analogy.
ANSWER: homology [accept homologous structures]
[10h] This subfield of biology with a rhyming name studies deep homology to explain how dissimilar organs are controlled by highly-conserved genes like PAX6 (“packs-six”), which is part of this subfield’s “gene toolkit.”
ANSWER: evo-devo [or evolutionary developmental biology; accept evo-devo gene toolkit; prompt on evolutionary biology or developmental biology]
<Editors, Biology>
| Editions | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|
| 2 | 118 | 13.81 | 74% | 53% | 12% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| Claremont A | UCSD B | 10 | 10 | 10 | 30 | EMH |
| Claremont C | UCLA A | 10 | 10 | 0 | 20 | EM |
| UC Irvine | USC B | 10 | 10 | 0 | 20 | EM |
| UC Santa Barbara | UCLA B | 10 | 10 | 0 | 20 | EM |
| UCLA C | Claremont B | 10 | 10 | 0 | 20 | EM |
| UCLA D | UCSD A | 10 | 10 | 0 | 20 | EM |
| UCLA F | UCLA E | 10 | 0 | 0 | 10 | E |
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| UK (North) | UK | Y | 5 | 14.00 | 100% | 20% | 20% |
| UK (South) | UK | Y | 8 | 10.00 | 88% | 13% | 0% |
| Northern California | US | Y | 1 | 20.00 | 100% | 100% | 0% |
| Southern California | US | Y | 7 | 20.00 | 100% | 86% | 14% |
| Eastern Canada (1) | US | Y | 5 | 12.00 | 60% | 40% | 20% |
| Eastern Canada (2) | US | Y | 9 | 11.11 | 78% | 33% | 0% |
| Florida | US | Y | 1 | 10.00 | 100% | 0% | 0% |
| Great Lakes | US | Y | 12 | 11.67 | 58% | 58% | 0% |
| Lower Mid-Atlantic | US | Y | 9 | 14.44 | 67% | 56% | 22% |
| Upper Mid-Atlantic | US | Y | 12 | 14.17 | 75% | 58% | 8% |
| Midwest | US | Y | 9 | 13.33 | 67% | 44% | 22% |
| North | US | Y | 1 | 20.00 | 100% | 100% | 0% |
| Northeast | US | Y | 12 | 19.17 | 83% | 83% | 25% |
| Pacific | US | Y | 9 | 8.89 | 44% | 44% | 0% |
| Southeast | US | Y | 13 | 13.08 | 62% | 54% | 15% |
| Upstate NY | US | Y | 5 | 18.00 | 100% | 60% | 20% |