When an organ is used it will develop and if it is not used, it weakens to become vestigial. Who could have said their theory
- ADarwin
- Bde Vries
- CLamarck
- DMendel
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- [AIPMT 2012]
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$R$ : Dairymen give antibiotics in the feed to the cattle and it becomes breeding grounds for the antibiotic resistant bacteria
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