Hel! M! Many scientists believe that stem cell research will one day lead to new treatments for diseases, but some people have ethical concerns about this research.

Which of the following characteristics of stem cell research is the most likely source of ethical controversy?

A. Stem cells naturally produce many different cell types.
B. Stem cell research requires specialized equipment.
C. Stem cells can replace damaged cells with healthy cells.
D. Stem cells are often extracted from human embryos.

D. Stem cells are often extracted from human embryos.

Explanation:

This is a major point of ethical concern and is also a root for many abortion conspiracy theories. The reason it is an ethical concern is because harvesting stem cells often times kills the embryo.

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

a

explanation: