Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Biology Ecology & Environment
High concentration of DDT due to biomagnification in birds causes the following effects, except
1
Change in calcium metabolism
2
Thickening of egg shell
3
Premature breaking of egg shell
4
More than one of the above
5
None of the above