C. Decreased death rate is the answer
I believe that it's Bilateral symmetry. Hope it's right. :)
the answer is the trophic level
Answer: Anesthesia
Explanation:
Anesthesia was used in 95% of Civil War surgeries. Sulfuric ether had been discovered in Europe in the 1830's and was first used as an anesthetic by William Morton in 1846. After a successful public demonstration it became widely used in surgery.
A virus is an infectious particle that reproduces by "commandeering" a host cell and using its machinery to make more viruses.
