11. They germinate and multiply into vegetative cells in the colon upon exposure to bile acids. 12. Some of the vegetative cells of " Ulothrix " are converted into thick walled akinetes. 13. Upon exposure to bile acids, they germinate and multiply into vegetative cells in the colon. 14. When the environment is favorable, the zygospore germinates, meiosis occurs, and haploid vegetative cells are released. 15. Endospores are resistant to most agents that would normally kill the vegetative cells they formed from. 16. The recombined haploid nuclei appear among vegetative cells , which differ genetically from those of the parent mycelium. 17. Sporulation is now complete, and the mature endospore will be released when the surrounding vegetative cell is degraded. 18. The copper alloys significantly reduced the viability of both " C . difficile " spores and vegetative cells . 19. Reproductive cells at first like the vegetative cells , later with a more massive chloroplast that eventually contains several pyrenoids. 20. The sexual program of Gonium is induced by nitrogen deprivation where each vegetative cell within the colony differentiates in gametes.
