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12.Ecosystem
normal
The phosphates remain outside the natural cycle for a long time
A
When they form compounds with metals
B
When they are incorporated in bone and teeth
C
When the bodies of the organisms excrete and decompose
D
Both $(a)$ and $(b)$
Solution
The phosphate remain outside the natural cycle for a long time when they form compounds with metals and are incorporated in bone and teeth.
Standard 12
Biology