Answer:
The periosteum is one source of precursor cells which develop into chondroblasts and osteoblasts that are essential to the healing of bone. Other sources of precursor cells are the bone marrow (when present), endosteum, small blood vessels, and fibroblasts.
A because a fossil is made of sediment and it takes a long time to make it.
<span>Mesozoic Era is the anwser</span>
Alleles on homologous chromosomes determine traits.
Mars element which can be at the room temperature and could also help be the same boiling point
