Acid rain is caused by several toxins in the atmosphere seeping into condensation inside clouds, so when the rain falls, it carries the toxins with it. Due to the small size of rain drops, they are not poisonous, however over time acid rain can cause damage such as decomposing statues.
rRNA is a component of ribosomes. Its name is ribosomal RNA
The next bone healing stage is called the hard callus<span> stage.This transformation occurs when bone forming cells called osteoblasts travel across the </span><span>soft callus.</span>
