The Sun belongs to this class of stars

A) red giant B) white dwarf
C) black hole D) main-sequence star


D

Environmental & Atmospheric Sciences

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Seed banks are important for ________

A) loans to developing countries to promote organic agriculture B) providing farmers with the current year's GM crops C) agricultural investments in developing countries D) protecting genetic diversity E) protecting monoculture productivity

Environmental & Atmospheric Sciences

Any diver who loses consciousness immediately following a dive should be assumed to have experienced:

A) barotrauma. B) nitrogen narcosis. C) an air embolism. D) decompression sickness.

Environmental & Atmospheric Sciences

The refraction of sound is due to changes in wave

A. speed. B. frequency. C. direction. D. all of the above

Environmental & Atmospheric Sciences

The southern part of the Sahara, subject to major droughts especially under conditions of global warming, is called the __________________.

Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences