| Numerous antherozoids are produced in the antheridia and they swim through the covering film of water to reach the archegonia, each of which contains a single egg cell. |
| Fern gametes are free-swimming and a thin film of water is required for the male gametes to travel from the antheridia into the neck of the archcgonia to fertilize the eggs. |
| Notwithstanding their general similarity, the archegonia of mosses differ externally from antheridia in having a longer neck and longer stalk. |
| Since the asexual gametophyte does not form antheridia or archegonia, crosses to confirm its genotype could not be performed. |
| Each antheridial chamber incorporates several antheridia, all of which are developed from one antheridial initial. |
| In the rotting tissues branches of the older mycelium similarly swell up and form antheridia and oogonia. |
