Biennials are plants with a two-year life cycle.

• A. They complete in one year
• B. They complete in two years
• C. They complete in three to four years
• D. They complete in four to five years

Answer: (B)

Biennials have a two-year life cycle. In the first year they germinate and grow, storing energy in leaves and stems. In the second year they use that stored energy to flower, produce seeds, and then die. That two-year pattern is what defines them, so the correct duration is two years. If a plant completes in one year, that’s an annual; three to four years or four to five years describe longer-lived growth patterns not typical of biennials. Examples include plants like carrots or foxglove that fit the two-year cycle under normal conditions.