Dr. Soult is studying the use of undifferentiated embryonic stem cells in the fight to cure leukemia. Which is a practical and ethical source for these building block cells? A. Aborted fetuses
B. Blood taken from newborns
C. Pay women to donate fetuses for research
D. Umbilical cord blood taken just after birth from the placenta

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

not only is it colder, it also becomes darker, less salty, and more dense.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.