Gene is the hereditary determinant
The electrons in these bonds carry energy. Within the power plants of the cell (mitochondria), energy is used to add one molecule of inorganic phosphate (P) to a molecule of adenosine diphosphate (ADP). The amount of energy stored is about 7,300 calories for every mole of ATP formed.
Flat face I believe is your answer
If two populations of birds stop interbreeding because of a difference in song patterns this would be described as behavioral isolation.
Answer:
Adenine nucleotides are added to the end of the RNA strand, forming a tail.