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The ability of an organism to change its characteristics in response to environmental variations is known as "Phenotypic Plasticity" and is the key driving factor in the evolution of a species. eg; If a Holly finds its leaves are being eaten by herbivores it switches genes on to make them spiky when they regrow. So on taller Holly trees the upper leaves which are out of reach have smooth edges, while the lower leaves which where previously eaten and have regrown are prickly.

In holly, it was found that the DNA of prickly leaves was significantly less methylated than prickless leaves, and from this it was inferred that methylation changes are ultimately responsible for leaf shape changes.

کچھوے اور خرگوش دونوں نے اپنے مشترکہ بیان میں کہا ہے کہ:
"کٸی صدیوں سے سناٸی جانے والی ہمارے درمیان دوڑ کے مقابلے کی کہانی من گهڑت، حقاٸق کے برعکس اور جھوٹ پر مبنی ہے۔ ہم نے اس قسم کا کوٸی مقابلہ نہ تو ماضی میں کیا ہےاور نہ مستقبل میں کرنے کا کوٸی ارادہ رکھتے ہیں۔"

Deep message ❤️

Do not find logic in the words of every old person because fools also grew older.

Point to be noted

دنیا کا سب سے بڑا اور عظیم الشان لیڈرصرف-
حضرت محمدؐ ہیں-