Durham city: Minute male capsules on the prothallus burst open, releasing sperm with whiplash tails that swim frantically towards the egg cells Since humans first began to pile stone upon stone to ...

This is a preview. Log in through your library . Abstract Ascospore germination, thallus initiation, and areole and prothallus development in the lichen Rhizocarpon lecanorinum Anders were examined ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

1. The genus Widdringtonia is quite distinct from Callitris and should be kept as a distinct genus, excluding Tetraclinis. 2. A fixing agent not generally employed in cytological work has been found ...

FOR more than a hundred years there have been conflicting statements regarding sex-determination in Equisetum. In the earliest accounts, the prothalli were described as unisexual. Later, it became ...