Question

Parachute mechanism of fruit and seed dispersal is common in Compositae is due to the structure called as

• A. Bracts
• B. Thorns
• C. Corolla
• D. Pappus

Answer 1

The correct option is D Pappus

Wind dispersal or anemochory, is one of the more primitive means of dispersal. Wind dispersal can take on one of two primary forms - seeds can float on the breeze or alternatively, they can flutter to the ground. The classic examples of these dispersal mechanisms include dandelions (Taraxacum sp., Asteraceae or Compositae), which have a feathery pappus attached to their seeds and can be dispersed long distances and maples (Sapindaceae), which have winged seeds and flutter to the ground. An important constraint on wind dispersal is the need for abundant seed production to maximize the likelihood of a seed landing in a site suitable for germination. So, parachute mechanism of fruit and seed dispersal is common in Compositae, due to the structure called as pappus and not because bracts, thorns and corolla.
Thus, the correct answer is option D.