The last one is C..............
Answer:
Explanation:
Water reacts with Carbon dioxide to form Carbonic acid, please see equation below:
H2O (water) + CO2 (carbon dioxide) ⇄ H2CO3 (carbonic acid)
Carbonic acid is a weak acid and some of it dissociates to Hydrogen ions and Hydrocarbonate ions, please see equation below:
H2CO3 (carbonic acid) ⇄ H+ (hydrogen ions) + HCO3-
A single undifferentiated cell. For example, in human, this was the embryo.
Like DNA, RNA is made up of nucleotides. There are two differences that distinguish DNA from RNA: (a) RNA contains the sugar ribose, while DNA contains the slightly different sugar deoxyribose (a type of ribose that lacks one oxygen atom), and (b) RNA has the nucleobase uracil while DNA contains thymine.
