Which plant category commonly requires vernalization?
B fits best: Winter annuals and biennials. Keep the VERNALIZATION & FLOWERING basics straight and Winter annuals and biennials stands out as the precise answer. Avoid: A) Summer annuals; C) Tropical plants; D) Aquatic plants. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.