Vernalization is done at

Analogy type questions:
$(1)$ Coconut milk : Zeatin : : $ABA$ : ...............
$(2)$ Phenolic acid : Seed dormancy : : Cold treatment : ...............

Importance of day length in flowering of plants was first shown in

Classify the following plants into Long Day Plants $(LDP)$, Short Day Plants $(SDP)$, and Day Neutral Plants $(DNP)$: Xanthium, Henbane $(Hyoscyamus \text{ } niger)$, Spinach, Rice, Strawberry, Bryophyllum, Sunflower, Tomato, Maize.

Chrysanthemum flowers in the winter season or in the evening because it is a:

Phytochrome occurs in two forms. In which form does it promote the germination of seeds of some species?