Answer:
Adenine and guanine are purines, while thymine, cytosine and uracil are pyrimidines.
Hope this helps! Sorry no one answered your question sooner :(
Although nitrogen gas makes up 78% of the atmosphere, we can't use it because nitrogen atoms must be broken apart first before. This nitrogen is very much packed and bonded with its atoms and would be useless to use since it can't be used for plants.
Glycolysis produces two molecules of pyruvic acid that undergoes a process allowing it to enter the kreb (citric acid) cycle that eventually produces ATP molecules from the electron transport chain
Keratinized, <span>stratified columnar, </span>
