Final answer:
Thick bark is an adaptation that helps plants survive frequent fires by protecting vital tissues. Other adaptations like underground rhizomes, rapid seed germination, and seed dormancy are also important in fire-prone biomes.
Step-by-step explanation:
The adaptation that helps plants live in a biome where frequent fires occur is developing thick bark. This adaptation provides protection against fire by insulating the vital tissues within the trunk and allowing the plant to survive and regenerate after a fire has passed. Additionally, plants in fire-prone areas may have adaptations such as underground rhizomes which can sprout new growth following a fire, or adaptations to ensure rapid seed germination after a fire to quickly reestablish the population. Some plants have seeds that remain dormant for long periods and only germinate in response to the specific conditions following a fire.
Other critical adaptations for terrestrial plant survival mentioned include the alternation of generations in the life cycle, apical meristem tissue growth, the evolution of a waxy cuticle to resist desiccation, and cell walls with lignin for structural support off the ground. These adaptations collectively facilitate the success of plants in diverse terrestrial environments.