What term is used to describe plants that require two years to complete their life cycle?

The term used to describe plants that require two years to complete their life cycle is biennial plants. Biennial plants typically germinate and grow in the first year, then store energy and undergo vegetative growth. In their second year, they flower, produce seeds, and complete the cycle by dying. This distinguishes them from other types of plants such as annuals, which complete their life cycle in one year, and perennials, which live for several years and can return each growing season. Deciduous refers to trees and shrubs that lose their leaves seasonally and is not related to the lifespan of the plants in the context of life cycles. Therefore, the correct identification of biennial plants is essential for understanding plant life cycles in agriculture and gardening.