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12 فبراير 2017

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هو مختلف التغيرات التي تطرأ على البذرة أثناء تحول الرشيم إلى نبتة.

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العلوم الطبيعية

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Marouan15 ديسمبر 2018 في 9:36 ص
هواستعادة الجنين الساكن لنشاطه ونموه يبدأ بتمزق غلاف الى بروز النبات الصغير منها ,وهو سلسلة من التغيرات التي تبدأ بامتصاص الماء وتمزق غلاف البذرة وبروز الجذير والمجموع الخضري.
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