Choose a letter:

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U
V - W - X - Y - Z

Glossary Terms for letter: U

uniformitarianism The theory that processes that occurred in the geologic past are still at work today.

Upper Paleolithic Refers to the most recent part of the Old Stone Age, associated with early modern Homo sapiens and characterized by finely crafted stone and other types of tools with various functions.

uracil One of four nitrogen bases that make up RNA; it pairs with adenine.

» Return to top of page

 

Section Menu

Organize

Learn

Connect

Norton Gradebook

Instructors now have an easy way to collect students’ online quizzes with the Norton Gradebook without flooding their inboxes with e-mails.

Students can track their online quiz scores by setting up their own Student Gradebook.