The majority of Earth's volume is within the
A) inner core. B) crust. C) outer core. D) mantle.
D
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The rosy periwinkle flower produces chemicals that are important in the treatment of several types of cancer. This medically significant plant represents the potential of
A) bioengineering. B) genetic therapy. C) the fields of bioinformatics and agriculture. D) the fields of ethnobotany and bioprospecting.
The Younger Dryas period
A) occurred nearly 100,000 years ago. B) lasted only a couple of decades. C) was quite warm in the Northern Hemisphere. D) had nothing to do with oceans. E) was likely caused by melting ice sheets.
Where are most comets thought to reside? What eventually becomes of comets that orbit close to the Sun?
What will be an ideal response?
All of the following are true regarding the polar cell EXCEPT
A. surface winds from the east. B. weak Coriolis Effect. C. a high pressure at poles. D. westerly winds aloft.