MCQ
Edaphic factor refers to:
- ARelative humidity.
- BSoil.
- CAltitude.
- DWater.
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$I.$ it contains human excreta and other organic waste
$II.$ it contains a number of pathogenic microbes
Which of the statement given above is/are correct?
$R$- The microspores are arranged in a cluster of four cells - the microscopic tetrad.