Answer:
I think the passage is trying to tell the reader that they shouldn't lose faith in people/animals just because they are elderly/weak when they are loyal to you because it will hurt their self-esteem.
50% is new and the other 50% comes from the old original DNA.
Answer: carbohydrate
Carbohydrates are sugars. They store short term energy and make up cell walls. Plants produce glucose, a carbohydrate, during photosynthesis to carry out the above functions. Other carbohydrates include lactose and starches, and they can be found in foods such as fruits, vegetables, bread, and pasta.