Answer:
must be mined from underground
Please mark me as brainliest
Answer:
The correct order is:
4. Mesenchymal cells aggregate.
2. Osteoblasts differentiate within mesenchymal connective tissue.
1. Clusters of osteoblasts form osteoid that becomes mineralized.
3. Spicules of bone radiate out from the ossification centers.
Molecular clocks use rates of mutation to measure evolutionary time.Mutations add up at a fairly constant rate in the DNA of species that evolved from a common ancestor. The more mutations that happened in each lineage, the greater is the differences between these lineages.