Answer:
A balance between Osteoblasts and osteoclasts maintain bone tissue.
Explanation:
Osteoblasts are bone making cells, osteoclasts resorb or break down bone, and osteocytes are mature bone cells.
Answer:sponge is one answer.
Explanation:
<span>A. the same DNA molecule is expressed differently.</span>
Answer:
E,D
Fossil fuels are used in cars that make smoke
