Exam

*one of these is wrong & will not be able to see which until July 2nd at 12:30

Carl Woese is BEST known for discovering that ______________

Prokaryotes comprise two very different branches: Bacteria & Archaea

The minimum age of the LUCA (last unique common ancestor) is the age of the oldest fossils that can be identified with certainty as close relatives of present-day prokaryotes and eukaryotes. Such fossils are about ________.

3.8 billions

Which of these is NOT an evolutionary advantage of the first cell membranes?

Proteins carry out much of the biochemistry of life, including DNA replication, but DNA stores the information needed to build correct proteins. Early life forms would have needed both proteins and DNA, but neither can exist without the other. The RNA world hypothesis is an appealing solution to this problem, because it states that ________.

some RNA molecules both store information and catalyze chemical reactions

A famous experiment that generated organic molecules from a mixture of gases thought to resemble the early Earth's atmosphere was carried out in 1953 by ________.

Stanley Miller