As few as __________ Escherichia coli O157:H7
cells can cause disease.
a. 11
b. 100
c. 10
d. hundreds
e. thousands
Answer: c
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A monomer is to a polymer, as glucose is to
A. lipids. B. carboyhydrates. C. nucleic acids. D. proteins. E. None of the choices are correct.
Which of the following is not a part of the male genital (reproductive) system?
A. Epididymis B. Vas deferens C. Prostate D. Ureter
Plantlike protists have which of the following traits in common with plants?
A.) They both have chlorophyll B.) They are both heterotrophic C.) They are both motile D.) They are both decomposers
Which step in the evolution of life is the most complex and probably occurred last?
A. Formation of amino acids B. Formation of protein–RNA systems C. Formation of membrane-bound protocells D. Spontaneous formation of organic compounds under abiotic conditions E. Formation of ATP