MCQ
Analogous organs are:
- ADifferent in origin but perform similar functions.
- BCommon in origin and perform common functions.
- CCommon in origin but perform different functions.
- DDifferent in origin and perform different functions.
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$1.$ primary treatment of sewage
$2.$ secondary treatment of sewage
$3.$ anaerobic sludge digester
$4.$ production of bioactive molecules