MCQ
Seminiferous tubules are found in
- ✓Testis
- BOvary
- CKidney
- DLung
Wall of each seminiferous tubules is formed of a single layered germinal epithelium.
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$I.$ sponges $II.$ Coelenterates $III.$ Flatworms
Select the correct option to complete the given statement
Reason : Injecting the microbes intentionally during immunisation or infectious organisms gaining access into body during natural infection induces active immunity.