it separates the inside of the cell from the environment outside and it controls substances moving in and out of the cell (selectively permeable)
Answer:
C - Ammonia
Explanation:
Ammonia is a highly toxic compound that is detrimental to one’s body. This toxic compound is often, and must be transformed into urea (uric acid) before being excreted from the body.
A diet deficient in calcium can cause osteopenia. The deficiency of calcium may Cause a low bone density which is a condition caused in osteoporosis. Hence the correct answer is B osteopenia.
The breakdown of tertiary and quartinary structures in a protein, a change in the active site
