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Question

Which orientation or movement occurs in rhizome and runner

A
Ageotropic
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B
Negatively geotropic
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C
Diageotropic
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D
Phagotropic
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Solution

The correct option is C Diageotropic
Diageotropic movement is shown by some modified branches and roots. They tend to grow at right angles to the line of gravity. Rhizome and runner modifications of stem show such orientation.
-Rhizome: It is fleshy and horizontally stems found below in soil. Small nodes and internodes are found which are covered by scaly leaves. Ex- Ginger, Turmeric, Canna, Water lily, Banana.
-Runner: When stem grows and spread on the surface of the soil. Roots are developed at the lower side and leaves from the upper side from node Ex- Cynodon dactylon (Doob grass), Oxalis.
So, the correct answer is 'Option C- Diageotropic'.

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