In order to provide more strength and resilience, the human vertebral column normally has how many curvatures?

A. one
B. two
C. three
D. four


Ans: D. four

Biology & Microbiology

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How does position effect influence gene expression?

A. Point mutations in promoters frequently occur by this mechanism B. Translocations may result in a promoter that is normally used for one gene now controlling an entirely different gene C. Since this mechanism relies on recombination it relies on the positioning of one allele so that it is under the control of the other allele. D. Translocations always result in a gene being recombined into an area of heterochromatin.

Biology & Microbiology

What type of bonds form from the unequal sharing of electrons?

A. hydrogen. B. ionic. C. polar covalent. D. nonpolar covalent. E. electrostatic.

Biology & Microbiology

Multiple effects of a single gene is known as

a. expressivity. b. penetrance. c. codominance. d. pleiotropy. e. multiple alleles.

Biology & Microbiology

How is DNA acquired during conjugation?

a. from the environment b. from bacteriophage c. from other bacteria d. all of the above e. none of the above

Biology & Microbiology