Which is the most likely reason that stem cell research is controversial?
-stem cell research could lead to the development of human clones
-many people assume that all human stem cells come from embryos.
-research by using stem cells results in high-priced treatments for disease.
-information that is obtained from stem cell research is considered unreliable.

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

The combining form leuk/o means red true or false

How far down have geologists drilled holes ? (science) a: 3.8 km b: 12 km c: 100 m d: 1200 km