Area where succession can take several thousands years to reach climax community is
Burnt and cut forest
Sand dunes
Flooded land
Abandoned farm lands
In an ecosystem the rate of production of organicmatter during photosynthesis is termed as
Why are nutrient cycles in nature called biogeochemical cycles ?
Vertical distribution of different species occupying different levels in a biotic community is known as
Savannah's are
$A$ : Successional process starts only in those areas, where no living organisms ever existed.
$R$ : These areas are not supported by physical environmental conditions.