$User->is_logged_in:  bool(false)
$User->user_info:  NULL
$User->check_post:  object(stdClass)#6976 (18) {
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$User->gift_id:  NULL

التطور التقاربي Convergent evolution

كائنان حيان أو أكثر لاتربطهما صلة، يعيشان في بيئةٍ متشابهة، ولهما ميزات متشابهة (مثل الجسم، والزعانف في القروش والدولفين). فمثلاً الدلافين من الثدييات والقروش من الأسماك، إلا أن الدلافين طورت نفس الصفات التى تملكها القروش لتستطيع التأقلم في البيئة المائية.

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