Which floral organ is modified into pappus in the family Asteraceae?
In Asteraceae, the calyx is modified into a pappus, which aids in seed dispersal.
Ref: NCERT Class 11 Biology chapter - Morphology of flowering plants
#floral organs
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Loss of APETALA2 results in floral organs:
Ca-St-St-Ca (B) is correct here. This is core PSS-Sec-E-Sensory biology: once you know the definition or pathway step, Ca-St-St-Ca is the clear fit. The wrong ones are A) Se-Pe-St-Ca; C) Se-Se-Ca-Ca; D) Pe-Pe-St-St. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
