Relative dating arranges<span> geological events, the rocks they leave behind, in a sequence. </span>
Answer:
D. A product.
Explanation:
The water can't be an enzyme, catalyst or reactant because it was not present before or during the reaction. It was only present after the reaction, so it is a product.
Answer:
The research is unethical(fetal stem cells) since the blastocyst, an unimplanted human embryo at the sixth to eighth day of development, is destroyed during the stem cell extraction process.