Which of the following are effective treatments for some allergic reactions?
I) antihistamines
II) epinephrine
III) corticosteroids
A) only I and III
B) only II and III
C) only I and IIII
D) I, II, and III
Answer: D
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The yolk, which is in many animal eggs, is
composed of
a. a mixture of individual amino acids and nucleic acids. b. a mixture of proteins and lipids. c. a mixture of proteins and carbohydrates. d. a mixture of nucleic acids and proteins. e. a mixture of lipids and nucleic acids
Cells with two of each kind of chromosome are
described by the term a. polyploid. b. diploid. c. triploid. d. haploid. e. tetraploid.
Harmful introduced species usually come into an area by:
a. human beings. b. the species themselves. c. hurricanes. d. floods. e. parasites.
Both a base and a phosphate are attached ____ in a nucleotide.
A. to each other B. to a sugar C. to each other and to a sugar D. None of these answers is true because phosphate is not part of a nucleotide.