To insure accuracy transcription only occurs one time at any given gene location on a strand of dna. true or false?

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?

What is the difference between a meteoroid and a meteor?