8.All of the following are simple machines except one. Please select the choice that is NOT a simple machine. A. Wheel and axel B. Screw C. Dish Washer D. Bike 9. We use simple matchines in our daily life. If i use a knife to cut my sandwitch for lunch,_ _ _ _ _ . A. I've used less force and done less work.
B. I've used more force and done more work.
C. I've used less force and done the same amount of work.
D. A knife is not an example of a simple machine.

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.