Nutrient uptake by plants acidifies soils because roots _____.
a. release sodium into the soil
b. absorb basic cations and desorb hydrogen
c. absorb acids and desorb bases
d. increase base saturation
Ans: b. absorb basic cations and desorb hydrogen
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La tolerancia de fabricación típica de una armadura en espiral es de _____.
a. ±1 ?4" b. ±1 ?2" c. ±3 ?4" d. ± 1"
What are the six groups of diseases that affect cats?
What will be an ideal response?
Technician A says that cutting coil springs is an acceptable method of properly lowering a vehicle. Technician B says that all leaf springs are made of steel. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
If the zener diode is replaced with a ____, the reference voltage can be set to any value desired.
a. voltage divider b. voltage inverter c. voltage rectifier d. voltage bridge