Plants with a two-year life cycle are called:

• A. Biennials
• B. Monocarpics
• C. Perennials
• D. Two-year life cycle plants

Answer: (D)

The main idea here is identifying the standard term for plants that complete their life cycle over two growing seasons. Those plants are called biennials. In the first year they usually grow vegetative tissues and store energy, often forming a rosette, and in the second year they flower, set seeds, and then die. This distinguishes them from annuals, which finish in one year, and from perennials, which live for many years and can flower multiple times.

The descriptive phrase “two-year life cycle plants” isn’t the formal label. Biennial is the precise botanical term. Monocarpic describes plants that flower only once in their lifetime (which includes many annuals and biennials), but isn’t the specific term for the two-year life cycle itself.