The first Mesozoic mammals were very distinctive from their ancestral reptiles. Indicate whether the statement is true or false
F
Environmental & Atmospheric Sciences
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Which of the following acts as a barrier to diffusion of ideas and/or cultural traits?
A. man-made laws B. the earth's topography C. distance D. all of these
Environmental & Atmospheric Sciences
To promote crop growth, a farmer is most likely to apply fertilizers to the soil that contain
A) nitrogen. B) nitrogen and phosphorus. C) carbon and phosphorus. D) carbon, hydrogen, and phosphorus.
Environmental & Atmospheric Sciences
Approximately how many stable isotopes have been identified?
A) 92 B) 118 C) 264 D) more than 300
Environmental & Atmospheric Sciences
Which of the following earth materials would you expect to have the lowest porosity?
A. Sandstone B. Clay C. Sand and gravel D. Fractured limestone E. Unfractured granite
Environmental & Atmospheric Sciences