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12.Ecosystem
medium
$...A...$ is required for higher primary productivity. $...B...$ have the lowest primary productivity as the soil is deficient in moisture.
Choose the correct option for $\mathrm{A}$ and $\mathrm{B}$
A
$A-$Rain; $B-$desert
B
$A-$Heat; $B-$forest
C
$A-$Rain; $B-$forest
D
$A-$Forest; $B-$desert
Solution
Rain is required for higher primary productivity. Desert have the lowest primary productivity as the soil is deficient in moisture
Standard 12
Biology
