The probability of tossing a coin and having it be heads or tails is
A. 1/4.
B. 2.
C. 0.
D. 1.
E. 1/2.
Answer: D
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A) ozone / UV radiation B) elemental sulfur / volcanism C) ferrous iron / hydroxylating radicals D) sulfate / hydrogen sulfide
Which of the following ligands would not have an intracellular receptor?
A) cortisol B) retinoic acid C) thyroxine D) epinephrine E) progesterone
Which statement is true?
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Chemical signals produced by leukocytes that affect other leukocytes are ____.
What will be an ideal response?