Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourag

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Q 2655101064.     Make a list of any three outbreeding devices that flowering plants have developed
and explain how they help to encourage cross-pollination.
OR
Why angiosperm anthers are called dithecous? Describe the structure of its
microsporangium.
CBSE-12th 2014

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