Which of the following is needed to start the Kreb
Cycle?

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

What could happen if two base pairs on a strand of dna or switched

Does anyone know what the schooling version of sos mean? example