lamarck theory states giraffes long necks evolved from stretching to reach high leaves

inheritance development educational vertebrates stretching lamarckism scientific morphology pliohippus biological organisms stretched offspring education evolution darwinism giraffes suggests lamarcks wildlife homology compared sciences lamarck evolved passing african savanna science homolog zoology biology animals analogy anatomy giraffe theory states leaves traits organs mammal africa animal darwin nature analog necks reach adapt trait limbs fauna long high tall neck life use ani