Because there are so many HLA allele combinations, it is rare to find unrelated individuals with the same HLA
halplotypes.
a. True
b. False
True
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Which body region is protected by fatty acids, acidic pH, lactic acid, and a tough cell barrier with its own normal biota?
A. Skin B. Respiratory tract C. Urinary tract D. Digestive tract E. Eyes
The two nitrogen atoms in nitrogen gas (N2) share six electrons forming a ________.
A. double bond B. single covalent bond C. hydrogen bond D. triple covalent bond E. double covalent bond
A molecule of RNA (ribonucleic acid) contains the bases _______.
a. adenine, guanine, thymine, and uracil b. uracil, adenine, guanine, and adenosine c. thymine, adenine, guanine, and cytosine d. adenine, guanine, cytosine, and uracil
The four stages of biofilm formation are
a. attachment, colonization, development, and dispersal. b. adherence, biosynthesis, maturation, and release. c. attachment, biosynthesis, maturation, and dispersal. d. adherence, infection, development, and activity.