How can calcium-rich B horizons form in soils on top of calcium-poor rock in hot and arid regions?
What will be an ideal response?
The calcium is delivered by the wind as dust particles and in rainfall.
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Which of the following correctly describes the chemical reactivity of citrate and isocitrate?
A) Both citrate and isocitrate can be oxidized. B) Neither citrate nor isocitrate can be oxidized. C) Citrate can be oxidized, but isocitrate cannot. D) Isocitrate can be oxidized, but citrate cannot.
An inversion represents an extremely stable atmosphere because ____
A) air becomes cooler with height B) surface air becomes warmer than air aloft C) inversions act as a lid on vertical air motion D) inversions allow air pollutants to escape freely from surface air
Bolivia is the only country in Latin America with a majority (55%) ________ population
A) indigenous B) African C) Asian D) mestizo
In the Public Land Survey System, ____________________ defines a point east or west of a principal meridian and ____________________ defines a point north or south of a base line
Fill in the blank(s) with correct word