MCQ
The soil organisms are
- AHarmful to the plants growing in the soil
- BUseful to plants growing in the soil
- CNeither harmful nor useful to plants growing in the soil
- ✓Both harmful as well as useful to plants growing in the soil
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$I.$ Species diversity increases as we move away from the equator towards the poles.
$II.$ Stellar's sea cow and passenger pigeon got extinct due to overexploitation by man.
$III.$ Lantana and Eichhornia are invasive weed in India.
$IV$. The historic convention on biological diversity was held in $1992 .$
Choose the option containing correct statements.
$(i)$ Avoid sex with unknown partners
$(ii)$ Use condoms during coitus
$(iii)$ Blood transfusion
$(iv)$ All of these