How does an influenza virus cause symptoms of the flu to spread in the human body?
O A. The viral nucleic acid attaches to the DNA in a host cell and then
lies dormant.
O B. The new viruses formed inside one cell infect and quickly kill other
cells.
O C. The virus particles produce toxins that poison cells throughout the
body.
O D. The proteins of the viral capsids kill all the cells around an
infected cell.

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.