00:10
00:09
00:08
00:07
00:06
00:05
00:04
00:03
00:02
00:01
| mode of organization; construction and arrangement of tissues, parts, or organs |
| the seas and atmosphere on earth before the existence of life, primarily containing a mixture of water, hydrogen, methane, ammonia, and carbon dioxide |
germ cell n.
An ovum or a sperm cell or one of their developmental precursors. Also called sex cell.
germ cell
|