BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Examples of long day plants are spinach, lettuce, radish, sugar beet, etc. Thus, the correct answer is Spinacia oleracea (spinach).

Detailed explanation-2: -Many of our summer-blooming flowers and garden vegetables are long-day plants, such as asters, coneflowers, California poppies, lettuce, spinach and potatoes. These all bloom when the days are long, during our summers. And some plants form flowers regardless of day length. Botanists call these “day-neutral” plants.

Detailed explanation-3: -flower only when amount of daylight lasts longer than their critical threshold, typically in spring or early summer, before the equinox. Examples of these plants include: aster, hibiscus, coneflower, lettuce, spinach, radish, sugar beet, and potato.

Detailed explanation-4: -Note: From all the given options, Mirabilis, Glycine max, Mirabilis jalapa are not long day plants but spinach is a long day plant which requires more sunlight than short days due to which that becomes the correct option.

Detailed explanation-5: -Solution. Explanation: Photoperiodism is defined as a plant’s developmental response to the length of the light and dark periods. Short-day plants include Viola, Kalanchoe, and Onion.