MCQ
Biofertilizers
- AKill pests
- BPrevent pest growth
- ✓Retain soil fertility
- DAll the above
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Reason : Injecting the microbes intentionally during immunisation or infectious organisms gaining access into body during natural infection induces active immunity.
Select the right options for $A, B, C$ and $D$ to the complete the given statement
| Column$-I$ | Column$-II$ |
| $(a)$. Limulus | $(i)$ Tusk shell |
| $(b)$. Ophiura | $(ii)$ Tapeworm |
| $(c)$. Taenia | $(iii)$ Brain coral |
| $(d)$. Meandrina | $(iv)$ King crab |
| $(e)$. Dentalium | $(v)$ Brittle star |
$I.$ $PCT$ $II.$ $DCT$
$III.$ Loop of Henle $IV.$ Collecting duct
Which contributes most in maintaining $pH$ of blood?