Which of the following increases the risk of permanent liver damage with hepatitis B infection?
A) coinfection with human herpesvirus 4
B) coinfection with hepatitis D virus
C) coinfection with HHV-6
D) coinfection with human herpesvirus 4 and hepatitis D virus
E) coinfection with hepatitis D virus and HHV-6
B
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A polar covalent bond would be most likely to form between
a. atoms with different electronegativities. b. cations and anions. c. atoms with ?+ and ?? charges. d. atoms with filled valence shells. e. atoms of the same element.
In the ball and stick view, the sticks (thick lines) represent ______________
a. atoms b. molecules c. bonds d. electrons
The most specific term usually used to describe a substance in a biological system that increases the rate of a reaction without being permanently changed by the reaction is a(n)
A. catalyzer. B. rate increaser. C. catalyst. D. enzyme.
In this diagram of the life cycle of a fern, which structure, A, B, C, or D, must swim through free water?
1.A
2.B
3.C
4.D