Which of the following best explains why RNA, rather than DNA, is thought to have been the first genetic material in early cells? A. RNA is more stable than DNA and can survive harsh conditions B. RNA is double-stranded, which makes it better at storing genetic information C. RNA can both store genetic information and catalyze chemical reactions D. DNA could not exist until proteins were present to help build it

Which of the following elements has valence electrons that occupy a 3p sublevel? 

Ty recently hired Samuel and is now beginning to train him. Ty made Samuel feel at ease, showed him what to do a few times while explaining the task, and then gave him the names of some employees he can contact in case he has any questions. Ty then proceeded to monitor Samuel’s work to ensure quality standards are met. Considering the job instructional training method, what step did Ty miss?

(04.04 MC) Which is the equation of a parabola with a directrix at y = 2 and a focus at (5, 0).

(04.04 MC) Which is the equation of a parabola with a directrix at y = −3 and a focus at (5, 3)?

Chemistry is 

Convert 0.0000028 to scientific notation

How many valence electrons does a neutral atom of selenium (Se) contain? 

Quand leur mère est arrivée, ils ______ de la musique française. (écouter)

Considering a company’s organization chart, the vertical lines show who reports to whom.