Which statement best differentiates annual weeds from perennial weeds?

• A. Annual weeds live more than two years and regrow from roots.
• B. Both annual and perennial weeds complete their life cycles in one year.
• C. Annual weeds complete their life cycle in one year; perennials live for more than two years and regrow from roots or crowns.
• D. Perennial weeds complete their life cycle in one year.

Answer: (C)

Annual weeds complete their entire life cycle in a single growing season, producing seeds to start the next generation and typically dying after that season. Perennial weeds, on the other hand, live for more than two years and can come back year after year because their root systems, crowns, or rhizomes store energy and sprout new growth even after the above-ground part is removed. This difference in lifespan and the ability to regrow from underground structures is what sets them apart and is why that statement is the best.

The other ideas mix up these facts: annuals do not live for multiple years, perennials do not complete their life cycle in one year, and not all perennials rely solely on seed to persist from year to year.