Answer:
cells - tissues - organs - organ systems - organisms
Internal state and environmental
Your body needs two key nutrients: calcium and vitamin D. Calcium is the mineral that strengthens bones and teeth, and vitamin D helps the body absorb calcium while improving bone growth. So stuff like <em>yogurt, milk, salmon, tuna, and spinach.</em>
<span>Genomic libraries can be constructed using phages. A phage, also called bacteriophage, is a virus which effects bacteria. There are more phages than any other organism in the world. Phages can be used for treatment of infections of the bacterial type.</span>
