Of all organisms, prokaryotes are the ____.
A. smallest
B. least abundant
C. least metabolically diverse
D. least widespread
E. most internally complex
Answer: A
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Which of the following best describes the hydrophilic component of cholesterol?
A. a hydroxyl group only B. a phosphate group only C. a phosphate group and a chemical group called choline D. a group of four planar rings and a hydroxyl group E. a single hydrocarbon tail
Phosphorus can be obtained from organic sources only.
Answer the following statement true (T) or false (F)
Which offspring in the illustration above are homozygous recessive for both traits?
a. PPTT b. ppTT c. PpTt d. pptt e. PPtt
All of the following are nonspecific defense mechanisms or barriers used by an animal except:a
acid secretions of the stomach. b. inflammation. c. antibodies. d. mucus in the respiratory tract. e. skin.