ATP is a source of energy
adenosine triphosphate
Adenine
Ribose
3 phosphate
Feathers are modified as scales. According to the history, birds which have feathers are the descendants of the dinosaurs which have scales.
That's why feathers are categorized as scales in the present record according to studies. <span />
The answer for this question would be letter A. Experimentation takes in by experimenting with your hypothesis, knowing what will happen and then gathering data from the outcome of the experiment. For your data, you create your analysis of what had happened then conclude.
Any formation in which groundwater rises on its own, under pressure, is called artesian well.
