asexual gemmae within gemma cup on thallus of liverwort (marchantiophyta), scotland - ploide video stock e b–roll00:13
evolution of vascular plants: the ferns - part 21 of 28. describes the evolution of vascular systems in land plants. the highly specialized structures that occur in vascular plants are shown through investigation of the fern. explains the adaptive advanta - ploide video stock e b–roll00:30