Sperms of both Funaria and Pteris/Dryopteris of Pteris/Dryopteris. Only its sperms enter the archegonia as

Sperm enters the egg from

Sperm enters the egg from

Sperm enters the egg from

Antherozoids of both funaria and pteris were released togetehr near the archegonia of pteris. Only its sperms enter the archegonia as

Antherozoids of both funaria and pteris were released together near the archegonia of pteris. Only its sperms enter the archegonia as

Antherozoids of both funaria and pteris were released together near the archegonia of pteris. Only its sperms enter the archegonia as

Antherozoids of both funaria and pteris were released together near the archegonia of pteris. Only its sperms enter the archegonia as

When sperms of Funaria and Pteris and placed near archegonium of Pteris only sperms of Pteris reach egg because