Answer:
Muḥammad ibn Mūsā al-Khwārizmī
Explanation:
AKA: Al-Khwārizmī,
Muslim mathematician and astronomer whose major works introduced Hindu-Arabic numerals and the concepts of algebra into European mathematics.
The president of the U.S. Senate is the VP, he is leader of all congress and is deciding vote
The method that was used and developed only after Darwin's time and is today a widely used method is the method of DNA comparison. At the time of Darwin, people didn't know about DNA or how it was structured, this was changed in the 20th century with the discovery of the double helix.