Why is soil development critical to a soil's ability to support plant growth?
What will be an ideal response?
Plants typically cannot extract nutrients directly from the minerals in rocks or regolith. The parent material must undergo chemical weathering to make the chemical components available to plants.
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A martial arts woman breaks a board with a blow of 3000 N. The force that acts on her hand is
A. 3000 N. B. less than 3000 N. C. more than 3000 N. D. not enough information
The maximum sustainable yield is best defined as the ________.
A. the annual size of the catch that will balance natural death and predation B. highest catch that will pay the minimum cost of the fishing effort C. highest catch that can be taken without overfishing D. maximum fishing effort allowed after overfishing is reached E. minimum catch that will still allow the population to grow
Acidic rain, snow, fog, and cloud vapor typically have a pH of ____.
A. about 7.0 B. 5.7 to 6.2 C. less than 5.6 D. about 6.6 E. more than 7.6
Compared to Earth's atmosphere, the Martian atmosphere has surface pressures that are ________
A) 50 times those on Earth B) 32.1 times those on Earth C) 1.5 times those on Earth D) 0.1 times those on Earth