A. bond forms when two atoms share one or more pairs of electrons

Collin would like to use the data a coworker has entered in a database. the problem is the coworker's database software is different from collin's. collin should

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems

This is the nitrogenous base only found in rna