Question

Why do androecium and gynoecium of sunflower matches at different time?

Answer 1

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This is a method to avoid self pollination and promote cross pollination. The hybrid of two different genome(in case of cross pollination) can better adapt to its environment and have genetic recombination.

If the gynoecium mature early, this condition is known as progyny.

And if androcium mature early this condition is known as proandry.

Both progyny and proandry leads to cross pollination.

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Answer 2

This is a method to avoid self pollination and promote cross pollination. The hybrid of two different genome(in case of cross pollination) can better adapt to its environment and have genetic recombination.

If the gynoecium mature early, this condition is known as progyny.

And if androcium mature early this condition is known as proandry.

Both progyny and proandry leads to cross pollination.