__________ are short sections of underground stem
encased by overlapping layers of thickened, modified
leaves called scales.
a. Stolons
b. Rhizomes
c. Bulbs
d. Corms
e. Tubers
Answer: c
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Nitrification and anammox both
A) create nitrogen gas, but nitrification is aerobic while anammox is anaerobic. B) oxidize ammonia, but nitrification uses O2 and anammox uses NO2- for electron acceptors. C) are aerobic processes, but nitrification produces NO3- and annamox produces N2 gas. D) occur in soils at neutral pH.
A truck driver is transporting a load of unripened bananas in an air-tight vehicle, and decides to stop and eat an apple
He also checks on his cargo, opening the back of his truck and walking around the unripened bananasâ€"all while still snacking on his apple. When he makes his final delivery, he opens the back of his truck to find that all of his bananas have ripened. Why? Select all correct choices. A. Opening the back of the truck exposed the bananas to oxygen. B. Exposure of the bananas to the apple (and its ethylene) instigated their ripening. C. The bananas would naturally ripen over time, even in an air-tight environment. D. Opening the back of the truck exposed the bananas to light of red wavelengths.
True or False: Only 10% of the nitrogen added to croplands ends up in food
A. true B. false
Which of the following is a difference between weak chemical bonds and covalent or ionic bonds?
A. Weak chemicals bonds are harder to break. B. Weak chemical bonds are shorter than covalent or ionic bonds. C. Weak chemical bonds are transient compared to covalent and ionic bonds. D. Weak chemical bonds are not particularly useful in biological systems. E. Weak chemical bonds require more energy to break than covalent and ionic bonds.