a. Plants mature at various times.
b. The plot of land is left unmanaged for long periods of time.
c. Fertilizer use and water use are reduced.
d. Pesticides are rarely needed.
e. It produces higher yields than high-input monocultures.
B
We lose 5 to 7 million hectares of productive cropland per year to ________
Which method uses natural or genetically engineered plants to absorb, filter, and remove contaminants from soil and water?
A. phytoremediation B. physical methods C. bioremediation D. nanomagnets E. chemical methods
________ are responsible for the heat generated in the interior today
A) Meteorite impacts B) Magma plutons C) Short-lived radioactive isotopes D) Nuclear reactions
The jet stream has winds that blow up to ________, which can greatly influence the impact of weather patterns over a continent.
A. 300-310 kilometers per hour B. 80-100 kilometers per hour C. 120-240 kilometers per hour D. 260-280 kilometers per hour