(vi) Fruits of which of the following plants are hairy and get blown off with the wind?
(1) Xanthium
(2) Drumstick
(3) Urena
(4) Sunflower
Answers
Answer:
(4) Sunflower
Explanation:
The sunflower's fruit is hairy.
Answer:
Option (2) Drumstick and Option (4) Sunflower
Explanation:
Sunflower seeds are very hairy and is dispersed by the mode of wind dispersion. The seeds are light due to their hairy nature and gets flown to other places during the time when wind blows.
Drumstick seeds too are very hairy and their mode of dispersion is also through wind. These seeds are also light and can get carried away to a considerable distance.
Exploring the other options:
(1) Xanthium
Xanthium seeds have hook like structures on their outer surface. This helps them to get attached to various surfaces such as clothes, fur etc. and gets dispersed to other places.
(3) Urena
Urena also has hook like structures that help them attach to animals, humans etc. and get carried away and dispersed to other places.
→ Other Modes of Dispersion:
✳ Dispersion through water
Those sees that have a spongy and husky outer covering are dispersed by means of water. For example coconuts.
✳ Bursting
Some specific species of plants such as castor and balsam burst and disperse innumerable seeds through the energy of the bursting.