Well, baby's start teething around 3-12 months old, so they should have a few teeth by then.
Endocytosis brings molecules in
Exocytosis takes molecules out
:)
Once a hypothesis is tested and confirmed, and then tested again and confirmed again by many others, it may provide the basis for, or become a part of, a scientific theory.
The human brain is the most complex organ in the human body
Https://www.britannica.com/place/North-America/Air-masses
