A 2-year-old girl is suspected of having a rotavirus infection. The specimen of choice to collect to identify the agent is:
a. stool.
b. blood.
c. urine.
d. throat.
A
Stool and rectal swabs of fecal specimens are used to detect rotavirus, enteric adenoviruses (se-rotypes 40 and 41), and enteroviruses.
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Climate is the ____
a. average weather conditions an area receives over a short interval b. average weather conditions an area receives over a long interval c. annual amount of sunlight an area receives
d. annual amount of rainfall an area receives e. annual amount of total precipitation that occurs in an area
Plants that have a distinct haploid stage and diploid stage exhibit:
a. parthenocarpy. b. binary generations. c. alternation of generations. d. asexual and sexual generations. e. mitotic and meiotic generations.
Which hypothesis states that the synthesis of DNA or RNA from the small molecules in the ocean would have come after the evolution of the plasma membrane and enzymes?
A. clay-catalyst hypothesis B. protein-first hypothesis C. chloroplast D. RNA-first hypothesis
Both base substitution and frameshift mutations can result in the formation of premature stop codons
Indicate whether the statement is true or false