The Northern Hemisphere polar jet stream migrates southward in winter and northward in summer
Indicate whether the statement is true or false
TRUE
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The regions that need most help to achieve the 2015 Millennium Goal 1 of alleviating hunger are
A) Eastern Asia and Latin America/Caribbean. B) Northern Africa and Western Asia. C) Southern Asia, Oceania, and Sub-Saharan Africa. D) Southeastern and Western Asia.
________ pollutants are chemicals or particles that are directly emitted from identifiable sources
A) Tertiary B) Natural C) Man-made D) Secondary E) Primary
Which of the following describes the typical composition of a ribosome?
A) 100% protein B) 100% rRNA C) 65% protein and 35% rRNA D) 65% rRNA and 35% protein
The main reason that there are relatively few invertebrates categorized as endangered species is because
A. Worldwide, there are relatively few invertebrates when compared to plants B. It is extremely difficult to identify and count invertebrates C. Invertebrates are more numerous and the relative percentages are similar D. Since there are 532 invertebrates considered endangered, none of these is true E. We consider other groups, such as mammals, to be more interesting and desirable