Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Parachute mechanism occurs in (1) Sonchus (2) Helianthus (2) Antirrhinum (4) CarthamusA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: B
Solution :
Parachute mechanism is shown by the cypsela fruits of family-Asteraceae, which possess persistent calyx (sepals) modified into hairy structures called pappus. At maturity, the fruit opens like an umbrella and floats in air currents. Pappus, being hygroscopic, absorbs moisture and becomes heavy. Thus, the fruit comes down just like parachute landing on the ground. eg, Sonchus, Helianthus, Tagetes, etc. Antirrhinum shows censor mechanism of dispersal while in Carthamus oxycantha, trumble seeds are found.
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