Which of the following is a benefit of stem cell use? A. Cancer treatment is limited.
B. Harvesting embryonic stem cells destroys the embryo.
C. Replacement of cells from injury can be generated from stem cells.
D. Stem cell differentiation is unattainable.

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.

Moving down the ramp from 6 meters to

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.