BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Many spring-and fall-flowering plants are short-day plants, including chrysanthemums, poinsettias and Christmas cactus. If these are exposed to more than 12 hours of light per day, bloom formation does not occur. Other plants require only a short night to flower. These are termed “long-day” plants.

Detailed explanation-2: -Short-day Plants Examples of short day plants include: chrysanthemum, rice, soybean, onion, violet, Christmas cactus, and poinsettia.

Detailed explanation-3: -A Poinsettia’s Inner Clock (Plants whose flowering is not dependent on the length of daylight are called day-neutral-they flower when the plant gets large enough or reaches a certain stage of development.)

Detailed explanation-4: -They only flower when the period of night is extended as they grow only in the dark. Complete answer: The short-day plants are those plants whose night time is extended more than their critical photoperiod for them to bloom and flower.

Detailed explanation-5: -The flowering is determined by the period of short night. Therefore, these plants are called ‘short night plants’. Example-Spinach.