Deficiency of which of the following is associated with pellagra?
A) folic acid
B) nicotinic acid
C) riboflavin
D) thiamine
B
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An endangered species is any species that
A. can undergo alteration of its genetic traits. B. might become rare within the next century. C. has so few individuals it may soon becomes extinct. D. will eventually become threatened or rare. E. can be considered economically important, but is rare.
Haley's Comet visits Earth's atmosphere once every 76 years. What branch of the Earth sciences is the main group that studies these phenomena?
A) meteorology B) geology C) oceanography D) astronomy
In an Am climate, the m stands for ____________________
Fill in the blank(s) with correct word
An irregular coast with bays separated by headlands can be straightened by plate tectonic forces.
Answer the following statement true (T) or false (F)