Question :
The coralloid root of cycas helps in
Option 1:
absorption of water
Option 2:
absorption of water and fixation of nitrogen
Option 3: anchorage
Option 4: transport of food
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Correct Answer:
absorption of water and fixation of nitrogen
Solution : The correct answer is the absorption of water and the fixation of nitrogen .
The coralloid roots of cycads are specialised structures that have a knobby appearance, resembling coral. The cyanobacteria live within specialised cells in the coralloid roots called "cyanobacterial chambers". In turn, the cyanobacteria provide the cycad with fixed nitrogen through a process called nitrogen fixation. Coralloid roots in cycas and other cycads also aid in water absorption.
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