Annual weeds complete their life cycle in one year.

• A. False
• B. Sometimes
• C. Annual weeds take two years to complete their life cycle.
• D. Annual weeds complete their life cycle in one year.

Answer: (D)

Annual weeds are defined by completing their entire life cycle—from germination to seed production and death—within a single growing season, typically one year. This means they sprout, mature, flower, set seed, and die in one year, often within one warm season. Because the life cycle fits into one year, the statement that they complete their life cycle in one year is the correct description. If a plant needs two growing seasons to reach maturity and produce seeds, that would be a biennial, not annual. Saying it takes two years or that the timing is variable doesn’t match the standard definition of an annual weed.