| the seas and atmosphere on earth before the existence of life, primarily containing a mixture of water, hydrogen, methane, ammonia, and carbon dioxide |
| reproduction in which the offspring resemble the parents and undergo the same cycle of development |
pigmentation pig·men·ta·tion (pĭg'mən-tā'shən)
n.
Coloration of tissues by pigment.
Deposition of pigment by cells.