Answer:
Oxygen 46%, silicon 28%, aluminum 8.3%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium 2.0%, and titanium 0.61% everything else is less than 0.15%
Answer:
The cornea is the only part of a human body that has no blood supply but gets oxygen directly from air
it's d, they're lysosomes.
To identify organisms and determine how groups are related