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1.
Microbes that breakdown the complex organic matter into simple substances like carbon, nitrogen, water, etc., are
2.
Which one of the following is no used for construction of ecological pyramids?
3.
Which element is formed by the weathering of rocks and absorbed by plant from the soil?
4.
Given diagram represents a pyramid of biomass in an aquatic system
Identifies
of 
and select correct options
Identifies
of and select correct options
5.
This type represents"
6.
The process of breaking down complex organic matter into inorganic substances like 
, water and nutrient is called
, water and nutrient is called
7.
Series of changes in structure and comparition of communities on previously barren area is
8.
Energy transferred from on trophic level to another is
9.
When the two ecosystems overlap each other, the areas is called
10.
The total amount of nutrients like carbon, phosphorus, calcium, etc., present in soil at any time is called