Question

Pivot Bio sells microbes that allow cereal crops to benefit from this process. For 10 points each:
[10m] Name this process which only occurs naturally in bacteria living on dicots (“DIE-cots”). Ongoing efforts to get it to work on monocots like corn aim to expand the colonization of di·azo·trophs or to express rhizobial (“rye-ZOH-bee-uhl”) genes in chloroplasts.
ANSWER: biological nitrogen fixation [or fixing nitrogen; or BNF; accept biological production of ammonia; prompt on fixation]
[10e] Slow-growing rhizobia (“RYE-zoh-bee-uh”) can only live on legumes because they form symbiotic nodules with these plant organs, allowing them to outcompete other microbes in the soil.
ANSWER: lateral roots
[10h] Rhizobia can be tricked into colonizing cereal roots if the crops secrete activators of this process of density-dependent signaling in bacteria. This process regulates bio·luminescence through the lux operon.
ANSWER: quorum sensing [or QS; or quorum signaling]
<Adam Silverman, Science - Biology&gt; ~20876~ &lt;Editor: Adam Silverman>

Back to bonuses

Summary

2023 PACE NSC06/10/2023Y3518.0097%54%29%

Data

Thomas Jefferson BBarrington B1010020
Canyon CrestMaggie Walker C1010020
Rockford Auburn ACarbondale1010020
Chattahoochee AWinston Churchill B0101020
Chattahoochee BWilliam Fremd1010020
Choate Rosemary HallMoberly010010
DunbarCincinnati Hills Christian10101030
Dallas CountyRockford Auburn B1010020
WinnebagoDetroit Country Day010010
HeightsStevenson B010010
Hunter AWashington10101030
PlymouthInnovation Academy B10101030
NormanIrvington A0000
Maggie Walker AJohn Adams A1010020
Hoover BJohns Creek A010010
Johns Creek BElkhorn North1010020
BelmontLake Highland1010020
Thomas Jefferson ALincoln-Way East1010020
KinkaidMaggie Walker B10101030
Detroit Catholic Central BMexico010010
Mercer CountyMira Loma1010020
NorrisMidtown010010
Detroit Catholic Central CNorthmont A010010
Northmont BInnovation Academy A010010
Parkway WestSaint Joseph010010
Richard MontgomeryHunter B010010
SolonStevenson A1010020
St. Mark'sBelvidere10101030
TroyHinsdale Central0101020
University LabThomas Jefferson D1010020
Detroit Catholic Central AWalter Payton010010
Thomas Jefferson CWaukee1010020
Barrington AWest Point10101030
Winston Churchill ANew Brighton0101020
WoodlandJohn Adams B0101020