$5^{\text {th }}$ $June$ is celebrated as
Water day
World environment day
Conservation day
World earth day
$5^{\text {th }}$ $June-$world environment day
$22^{\text {nd }}$ $April-$world earth day
Ultraviolet radiation from sunlight cause the reaction that produce
Concept of mimicry was given by …$A$…
Father of Indian Plant Ecology …$B$…
Term 'ecology' coined by …$C$…
Here $A, B$ and $C$ refers to
$Y-$ shaped energy flow model was given by
$A$ : Different ecotypes of a species despite being genotypically different are interfertile. $R$ : They are locally natural selections from a pool of genetic variations found in gene pool of a species.
When births are equal to deaths. It is called
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