An adaptation that makes bipedalism possible is the need to get around. If your slithering on the ground, you could get diseases, or get hurt.
The skeletal system does not digest. That is the job of the digestive system. Hope this helps!
According to google. It is a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
The rungs are composed of hydrogen bonded paired Nitrogenous Bases. These pairings are Adenine to Thymine and Guanine to Cytosine.
Yes jaja why do you ask the questions