Which of the following viruses is an RNA virus that causes many cases of transfusion hepatitis?
A. Cytomegalovirus (CMV)
B. Epstein Barr Virus (EBV)
C. Adenovirus
D. Hepatitis C virus (HCV)
E. Hepatitis B virus (HBV)
Answer: D
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Summarize the arguments, both for and against, for the hypothesis that Abraham Lincoln had Marfan syndrome
What will be an ideal response?
Each DNA strand serves as a _____during DNA synthesis
a. replicate b. substitute c. template d. source of nucleotides e. primer
When a female has low levels of estrogen and progesterone, ________
A) she is ovulating B) her uterus is ready to accept an embryo C) she is pregnant D) she is menstruating
Both mosses and ferns must have freestanding water present (e.g., water droplets) in order to fulfill their requirements for fertilization. Which of the following is the most likely explanation for this?
a. Both mosses and ferns have gametes that require the plant to take in a lot of water in order to fulfill their photosynthetic requirements. b. Both mosses and ferns have motile male and motile female gametes that come together in water to fertilize. c. Both mosses and ferns have motile female gametes that require water to travel to the male gametes. d. Both mosses and ferns have motile male gametes that require water to travel to the female gametes. e. None of the above is a good explanation for why this occurs.