Saturday, 26 March 2011

2.80

Describe the geotropic responses to roots and stems

Geotropism: Geo – gravity, Tropism – growth response
When the embroic root grows downwards, it is called a positive geotropism.
When the shoot grows upwards through the surface it is called negative geotropism.
If you rotate the seed around instead of continuing to grow on the right and the left, it will either grow upwards or downwards (negative and positive geotropism).

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