A climate proxy provides indirect evidence for historical changes in climate.
Answer the following statement true (T) or false (F)
True
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Which of the following phenomena appears as a ring of light encircling the sun or moon?
A. either a halo or a sundog B. either a halo or a corona C. either a rainbow or a halo D. either a sundog or a crepuscular ray
A SNP is
A) a mutation that affects eggs or sperm. B) a location in the human genome where the nucleotide sequence differs among individuals. C) almost always a recessive allele. D) a repeat sequence in the human genome.
Which of the following is true of the monomeric units which react to form Kevlar?
A) They are both 1,4-disubstituted benzene derivatives. B) They are both 1,3-disubstituted benzene derivatives. C) They are both 1,2-disubstituted benzene derivatives. D) None of the above is true.
A perennial river that begins in a humid region but flows across an arid region is a(n) ____________________ river
Fill in the blank(s) with correct word