A variety of the cotton modified to resist pests without the use pesticides is
A. Bt cotton.
B. Pl cotton.
C. Pt cotton.
D. Bl cotton.
Answer: A. Bt cotton.
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Frontal wedging plays a major role in producing clouds and precipitation in the midwestern portion of the US.
Indicate whether the statement is true or false.
What allocates resources?
A) The economic system of supply and demand B) The amount of easily accessible resources C) The impact of mining operations on an ecosystem D) None of these choices
The ________ emits mainly ________ which is also called ________
A) Sun—shortwave radiation—radio waves B) Sun—longwave radiation—infrared C) Earth—shortwave radiation—infrared D) Earth—longwave radiation—thermal infrared E) Earth—longwave radiation—ultraviolet
As the solar system began forming, the first materials to condense into small particles were ________ and nickel
A) nitrogen B) carbon C) oxygen D) silicon E) none of these