Which of the following terms describes plants that complete their life cycle in two years?

The term that describes plants which complete their life cycle in two years is "biennial." Biennial plants typically go through a two-year life cycle: in the first year, they grow vegetatively, producing leaves, stems, and roots, while in their second year, they flower, produce seeds, and complete their life cycle.

In contrast, annual plants complete their life cycle within a single growing season, typically germinating, flowering, and dying within one year. Perennial plants live for more than two years, often going through multiple cycles of growth and reproduction over several years. Understanding these definitions is crucial in plant science, as it helps in the study of plant behaviors, agricultural practices, and ecosystem dynamics.