7.
If the plant producer dies in the ecosystem, then the system is
Answer : A. Seriously affected
8.
Urea is fromed during
Answer : C. Ornithine cycle
9.
Air pollutants destroy the
Answer : D. Ozone layer
10.
The gases which are responsible for acid rain are
Answer : B. Nitrogen dioxide and Sulphur dioxide
11.
Which one of the following is correctly matched?
Answer : D. Decomposer - Bacteria
12.
The total organic matter present in an ecosystem is referred as
Answer : A. Biomass