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    4. what is photoperiodism?
    what is photoperiodism?

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    0  Views: 584 Answers: 1 Posted: 13 years ago
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      many angiosperms flower at about the same time even though there occurance period is different.the flowering is response to changing lenght of days and night as the season progresses...this is photoperiodism.it promotes cross pollination.

      13 years ago. Rating: 0
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