All of the following are true of human parvovirus B19, except
A. it may cross the placenta and cause severe damage to the fetus.
B. its genome consists of single-stranded DNA.
C. this virus can also cause severe disease in puppies.
D. this is one of the smallest human viruses.
E. it causes a disease known as fifth disease in young children.
Answer: C
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A. 75% B. 0% C. 100% D. 50% E. 25%
Mitogens are _____
(a) extracellular signals that stimulate cell division. (b) transcription factors important for cyclin production. (c) kinases that cause cells to grow in size. (d) produced by mitotic cells to keep nearby neighboring cells from dividing.
Which health issue is not caused by a nonenveloped virus?
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The California newt is found only in California. This is an example of a(n) ________ species
A) ubiquitous B) metapopulation C) endemic D) invasive