Why and how does the skeletal system interact with the digestive system?

The skeletal System cannot produce its own calcium to strengthen itself. It depends on the digestive system. When we eat food that contains calcium and phosphorus, the body breaks the food down into smaller molecules that can be absorbed by the body into the bloodstream.. 

hope this helps

Covalent bond is the correct answer

This bacteria must be very strong as it has a large amount on antibiotic targeting it. this bacteria could be one of many different types and it is very hard to tell which one with out more information.