Lightning is one of the natural mechanisms by which atmospheric nitrogen fixation is accomplished
Indicate whether the statement is true or false
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We should never assume that any aspect of culture has diffused unless we can demonstrate the path of diffusion from one culture to another
Indicate whether the statement is true or false.
An igneous rock in which large mineral grains called ____________________ are suspended in a
finely crystalline groundmass is called a(n) ____________________. Fill in the blank(s) with the appropriate word(s).
The state of matter of the material in Earth's inner core is ____________________
Fill in the blank(s) with correct word
You are hired by a pesticide company to determine whether its new pesticide ("Zap-em") is effective at controlling soybean aphids, an invasive species that costs American farmers millions of dollars a year in crop damage and control costs
Describe an experiment you would perform to test the effectiveness of Zap-em.