The geologic time scale organizes the history of the earth. which division in the geologic time scale is the shortest length of time? a. period b. eon c. epochd. era

The correct answer is option C, that is, epoch.  

An epoch refers to a time unit. An epoch in geological time scale refers to a subdivision, which is lengthier than an age but briefer in comparison to a period. The present epoch is the Holocene epoch of the Quaternary period.  

The two or more periods form a geological era, two or more eras form an eon and is the largest division of the geologic time.  

i believe the answer is c

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.