Which of the following is a difference between plant cells and animal cells? a. animal cells undergo cell division; plant cells do not divide. b. plant cells have a rigid structure, while animal cells have have a more flexible structure c. animal cells carry out photosynthesis; plant cells do not. d. in plant cells, dna is stored in the mitochondria; in animal cells, the dna is stored in the nucleus.

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.