Question
Similar to autotoxicity, the accumulation of this phenomenon’s remnants contributes to “replant disease” or the inability of new plants like apples to establish themselves in soil once inhabited by a related species. For 10 points each:
[10h] Give this term, classically exemplified by the black walnut tree, which sees a plant’s roots or leaf litter release biotoxins like juglone to inhibit the growth and reproductive potential of a competing organism.
ANSWER: negative allelopathy
[10m] Toxic allelochemicals can be released into the soil through the decay of leaf litter into humus in this horizon, which surmounts the A horizon.
ANSWER: O horizon [prompt on horizon; prompt on topsoil]
[10e] The production of momilactone B in this crop underlies its potential use as a weed-killing allelopathic agent. The genus Oryza contains this crop, whose “golden” strain gets its color from beta-carotene, a precursor to Vitamin A.
ANSWER: rice
<KT, Biology>
Summary
| 2023 ARCADIA at UC Berkeley | Premiere | Y | 2 | 20.00 | 100% | 100% | 0% |
| 2023 ARCADIA at Carleton University | Premiere | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA at Claremont Colleges | Premiere | Y | 1 | 10.00 | 100% | 0% | 0% |
| 2023 ARCADIA at Indiana | Premiere | Y | 5 | 8.00 | 40% | 40% | 0% |
| 2023 ARCADIA at RIT | Premiere | Y | 2 | 20.00 | 100% | 100% | 0% |
| 2023 ARCADIA at WUSTL | Premiere | Y | 3 | 13.33 | 33% | 100% | 0% |
Data
| Stanford A | Berkeley A | 0 | 10 | 10 | 20 |
| Berkeley B | Berkeley C | 0 | 10 | 10 | 20 |