Which material, principle, or process enables absolute (numerical) age dating?
a. cross-cutting
b. fossils
c. radioactivity
d. inclusions
e. superposition
Answer : c. radioactivity
Environmental & Atmospheric Sciences
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Which of the following amino acids absorbs UV radiation at 280 nm?
A) phenylalanine B) tryptophan C) tyrosine D) all of these
Environmental & Atmospheric Sciences
Regional differences causing diversity within the same language, such as 'soda' versus 'pop', are known as:
A) Creoles B) Dialects C) Jargons D) Vernaculars
Environmental & Atmospheric Sciences
What is the distinction between marsupial and placental mammals? What will be an ideal response?
Environmental & Atmospheric Sciences
Genetic resistance to antibiotics has
a. increased the spread of AIDS b. been a factor in the development of MRSA c. been favored by overuse of antibiotics d. two of these answers are correct e. all of these answers
Environmental & Atmospheric Sciences