Species a and species b share 80% of the same nucleotide sequences. species a and species c share 70%. is species a more closely related to species b or c? how do you know?

B. They have more a more similar nucleotide sequence.

The answer would be vitamin and mineral deficiencies.

The small intestine has a role in food digestion and absorption. Bypassing most of the small intestine will reduce the food transit time there, thus reducing the amount of substance that can be absorbed. 
These surgery supposed to help diabetes type 2 patient, not making it worse. It should be not related to kidney or muscle.